CN111244312A - Display panel and manufacturing method thereof - Google Patents
Display panel and manufacturing method thereof Download PDFInfo
- Publication number
- CN111244312A CN111244312A CN202010061035.1A CN202010061035A CN111244312A CN 111244312 A CN111244312 A CN 111244312A CN 202010061035 A CN202010061035 A CN 202010061035A CN 111244312 A CN111244312 A CN 111244312A
- Authority
- CN
- China
- Prior art keywords
- layer
- graphene
- display panel
- graphene oxide
- substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 97
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 346
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 343
- 239000000758 substrate Substances 0.000 claims abstract description 247
- 239000002131 composite material Substances 0.000 claims abstract description 85
- 150000007530 organic bases Chemical class 0.000 claims abstract description 56
- 238000004806 packaging method and process Methods 0.000 claims abstract description 25
- 239000010410 layer Substances 0.000 claims description 490
- 238000000034 method Methods 0.000 claims description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 239000011248 coating agent Substances 0.000 claims description 29
- 238000000576 coating method Methods 0.000 claims description 29
- 229910002804 graphite Inorganic materials 0.000 claims description 20
- 239000010439 graphite Substances 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 16
- 238000004381 surface treatment Methods 0.000 claims description 15
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 14
- 238000011946 reduction process Methods 0.000 claims description 13
- YTAHJIFKAKIKAV-XNMGPUDCSA-N [(1R)-3-morpholin-4-yl-1-phenylpropyl] N-[(3S)-2-oxo-5-phenyl-1,3-dihydro-1,4-benzodiazepin-3-yl]carbamate Chemical compound O=C1[C@H](N=C(C2=C(N1)C=CC=C2)C1=CC=CC=C1)NC(O[C@H](CCN1CCOCC1)C1=CC=CC=C1)=O YTAHJIFKAKIKAV-XNMGPUDCSA-N 0.000 claims description 11
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 10
- 239000012044 organic layer Substances 0.000 claims description 10
- 230000003647 oxidation Effects 0.000 claims description 10
- 238000007254 oxidation reaction Methods 0.000 claims description 10
- 238000005538 encapsulation Methods 0.000 claims description 9
- 238000001291 vacuum drying Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- 238000013329 compounding Methods 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 238000011282 treatment Methods 0.000 claims description 3
- 238000013532 laser treatment Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 49
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 27
- 229910052760 oxygen Inorganic materials 0.000 description 27
- 239000001301 oxygen Substances 0.000 description 27
- -1 graphite alkene Chemical class 0.000 description 20
- 230000008569 process Effects 0.000 description 14
- 238000000926 separation method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000002035 prolonged effect Effects 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229920000620 organic polymer Polymers 0.000 description 5
- 239000002356 single layer Substances 0.000 description 5
- 239000004642 Polyimide Substances 0.000 description 4
- 229920001721 polyimide Polymers 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000001338 self-assembly Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 238000004528 spin coating Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 210000000438 stratum basale Anatomy 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 125000001033 ether group Chemical group 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/80—Manufacture or treatment specially adapted for the organic devices covered by this subclass using temporary substrates
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The embodiment of the invention provides a display panel and a manufacturing method thereof. The display panel includes: at least one graphene composite substrate, the graphene composite substrate comprising an organic base layer and at least one graphene layer; an array layer located over the graphene composite substrate, the array layer including a plurality of transistors; the display layer is positioned on one side, away from the graphene composite substrate, of the array layer, the display layer comprises a plurality of light-emitting devices, and the light-emitting devices comprise a first electrode, a light-emitting layer and a second electrode which are sequentially stacked on the array layer; and the packaging structure is positioned on one side of the display layer, which is far away from the graphene composite substrate. The invention can prolong the service life of the light-emitting device in the display panel and can improve the temperature resistance and the antistatic capability of the display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a manufacturing method thereof.
Background
An OLED (Organic Light-Emitting Diode) is also called an Organic electroluminescent display or an Organic Light-Emitting semiconductor. The OLED display panel is thinner and lighter than an LCD (liquid crystal display panel), has high brightness, low power consumption, fast response, high definition, good flexibility and high light emitting efficiency, can meet new requirements of consumers on display technologies, and gradually becomes a hotspot of research of various manufacturers.
At present, the service life of the OLED device is still one of the key problems troubling the development of the OLED industry, and the analysis of the needed research results shows that the existence of water vapor in the OLED device is a main factor influencing the service life of the OLED device. Therefore, how to effectively isolate water and oxygen to prolong the service life of the OLED device is a technical problem to be solved.
Disclosure of Invention
The embodiment of the invention provides a display panel and a manufacturing method thereof, and aims to solve the technical problem of effectively isolating water and oxygen and prolonging the service life of an OLED device.
In a first aspect, an embodiment of the present invention provides a display panel, including:
at least one graphene composite substrate, the graphene composite substrate comprising an organic base layer and at least one graphene layer;
an array layer located over the graphene composite substrate, the array layer including a plurality of transistors;
the display layer is positioned on one side, away from the graphene composite substrate, of the array layer, the display layer comprises a plurality of light-emitting devices, and the light-emitting devices comprise a first electrode, a light-emitting layer and a second electrode which are sequentially stacked on the array layer;
and the packaging structure is positioned on one side of the display layer, which is far away from the graphene composite substrate.
Based on the same inventive concept, in a second aspect, an embodiment of the present invention provides a method for manufacturing a display panel, including:
manufacturing a graphene composite substrate on a rigid substrate, wherein the graphene composite substrate comprises an organic base layer and at least one graphene layer;
sequentially manufacturing an array layer, a display layer and a packaging structure on the graphene composite substrate;
after the manufacturing of the packaging structure is finished, the method further comprises the following steps: and separating the graphene composite substrate from the rigid substrate.
Based on the same inventive concept, in a third aspect, an embodiment of the present invention provides a method for manufacturing a display panel, including:
an organic base layer is fabricated on a rigid substrate,
sequentially manufacturing an array layer, a display layer and a packaging structure on the organic substrate layer;
after the manufacturing of the packaging structure is finished, the method further comprises the following steps: separating the organic base layer from the rigid substrate;
carrying out surface treatment on one side of the organic substrate layer, which is far away from the array layer, by using a graphene oxide solution, and compounding a graphene oxide layer on the surface of the organic substrate layer, which is far away from the array layer;
and reducing the graphene oxide layer by adopting a reduction process to obtain the display panel comprising the graphene composite substrate, wherein the graphene composite substrate comprises an organic base layer and at least one graphene layer.
The display panel and the manufacturing method thereof provided by the embodiment of the invention have the following beneficial effects:
display panel is including being located array layer, display layer and the packaging structure on the compound substrate of graphite alkene in proper order, and packaging structure can play the effect of separation water oxygen in the light-emitting side of display layer, avoids water oxygen to luminescent device's infringement, has promoted luminescent device's life. In addition, the graphene composite substrate comprises an organic base layer and at least one graphene layer, the graphene molecules in the graphene layer are stable in structure and have excellent water repellency, the separation of water and oxygen on one side of the display panel substrate (namely, the light emitting side departing from the display layer) can be realized, and further, the service life of the light emitting device is prolonged. Meanwhile, the graphene layer also has good temperature resistance, excellent heat conductivity and conductivity, and the temperature resistance and the antistatic capability of the display panel can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a film structure of an alternative embodiment of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a film structure of an alternative embodiment of a display panel according to an embodiment of the invention;
fig. 3 is a schematic diagram of a film structure of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another alternative embodiment of a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another alternative embodiment of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic flow chart of an alternative implementation of a manufacturing method of a display panel according to an embodiment of the present invention;
fig. 7 is a flowchart of another alternative embodiment of a method for manufacturing a display panel according to an embodiment of the present invention;
fig. 8 is a flowchart of another alternative embodiment of a method for manufacturing a display panel according to an embodiment of the present invention;
fig. 9 is a flowchart of another alternative embodiment of a method for manufacturing a display panel according to an embodiment of the present invention;
fig. 10 is a flowchart of manufacturing a graphene oxide solution according to an embodiment of the present invention;
fig. 11 is a schematic flow chart illustrating another alternative implementation of a manufacturing method of a display panel according to an embodiment of the present invention;
fig. 12 is a flowchart of another alternative embodiment of a method for manufacturing a display panel according to an embodiment of the present invention;
fig. 13 is a flowchart of another alternative embodiment of a method for manufacturing a display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
In the related art display panel, an organic light emitting device is fabricated on a base layer made of an organic polymer. The organic polymer material is easy to form hydrogen bond action with water molecules, so that the organic polymer material does not have the characteristic of water and oil resistance, and the effect of blocking water vapor is difficult to achieve, so that the service life of the OLED device is greatly reduced. In order to improve the service life of the OLED device, one solution in the related art is to deposit a layer of inorganic nano-oxide on a substrate layer made of organic polymer to form a water-oxygen barrier film. However, due to the size effect of the inorganic nano oxide, the inorganic nano oxide is difficult to uniformly disperse and easy to agglomerate, and the nano oxide falls off in the preparation treatment process, so that the formed water vapor barrier film has the defect of a plurality of microns. Therefore, the organic polymer substrate layer modified by the inorganic oxide is difficult to play a role in prolonging the service life of the OLED device.
Based on the problems in the related art, the embodiment of the invention provides a display panel and a manufacturing method thereof. Meanwhile, the graphene layer has good temperature resistance, excellent heat conductivity and conductivity, and the temperature resistance and the antistatic capability of the display panel can be improved.
Fig. 1 is a schematic diagram of a film structure of an alternative embodiment of a display panel according to an embodiment of the present invention. Fig. 2 is a schematic diagram of a film structure of an alternative embodiment of a display panel according to an embodiment of the present invention.
As shown in fig. 1, the display panel includes:
at least one graphene composite substrate 101, the graphene composite substrate 101 comprising an organic base layer 1011 and at least one graphene layer 1012; optionally, the organic substrate layer 1011 is made of any one of Polyimide (PI) and polyethylene terephthalate (PET). Fig. 1 is only illustrated with the graphene composite substrate 101 including one graphene layer 1012. Optionally, the graphene composite substrate 101 includes two graphene layers 1012 on the organic base layer 1011, or the graphene composite substrate 101 includes three graphene layers 1012 on the organic base layer 1011. The number of graphene layers 1012 in the graphene composite substrate 101 may be designed according to specific needs.
As illustrated in fig. 1, the graphene layer 1012 is located on a side of the organic substrate layer 1011 close to the array layer 102, and in another embodiment, the graphene layer 1012 may also be located on a side of the organic substrate layer 1011 away from the array layer 102. In the embodiment of the present invention, one graphene layer 1012 is a single graphene layer, that is, a monoatomic carbon layer formed by combining carbon atoms through sp2 hybridization, and has a very stable structure, excellent mechanical properties, excellent electrical conductivity, good thermal properties, and a light transmittance of up to 93%, and at the same time, the graphene layer has very good self-lubricity. Since the graphene molecules are composed of segments such as-C-, -C ═ C-, and the like, the graphene has excellent water repellency, and the graphene layer 1012 has a good water vapor barrier effect due to the honeycomb-shaped network structure of the graphene.
Continuing to refer to fig. 1, an array layer 102 located on the graphene composite substrate 101, the array layer 102 including a plurality of transistors T; the structure of the transistor T is only schematically shown in the figure, and in another embodiment, the transistor T may also be of a bottom-gate structure.
And a display layer 103 located on a side of the array layer 102 away from the graphene composite substrate 101, wherein the display layer 103 includes a plurality of light emitting devices P and a pixel defining layer PDL for spacing the adjacent light emitting devices P. The light emitting device P includes a first electrode a, a light emitting layer b, and a second electrode c sequentially stacked on the array layer 102; optionally, the first electrode a is a reflective anode, the second electrode c is a transparent cathode, when a voltage is applied to the first electrode a and the second electrode c, the light-emitting layer b is excited to generate light, the light emitted to the second electrode c directly penetrates through the second electrode c to be emitted, and the light emitted to the first electrode a penetrates through the second electrode c to be emitted after being reflected by the first electrode a. Schematically, the transistor T in the array layer 102 is electrically connected to the first electrode a.
And the packaging structure 104 is positioned on the side of the display layer 103 far away from the graphene composite substrate 101. As illustrated in fig. 1, the encapsulation structure 104 includes one organic layer 104j and two inorganic layers 104w, wherein the organic layer 104j is located between the two inorganic layers 104 w. In another embodiment, as shown in fig. 2, the package structure 104 includes a package cover plate 104b and a sealant J, the package cover plate 104b is fixed to the array layer 102 by the sealant J, and optionally, the package cover plate 104b is a glass cover plate. In the embodiment of the present invention, the encapsulation structure 104 covers and surrounds the display layer 103, so that the light emitting device P can be encapsulated and protected on the light emitting side of the light emitting device P.
The display panel provided by the embodiment of the invention comprises the array layer, the display layer and the packaging structure which are sequentially arranged on the graphene composite substrate, wherein the packaging structure can play a role in blocking water and oxygen on the light emergent side of the display layer, so that the damage of the water and oxygen to the light-emitting device is avoided, and the service life of the light-emitting device is prolonged. In addition, the graphene composite substrate comprises an organic base layer and at least one graphene layer, the graphene molecules in the graphene layer are stable in structure and have excellent water repellency, the separation of water and oxygen on one side of the display panel substrate (namely, the light emitting side departing from the display layer) can be realized, and further, the service life of the light emitting device is prolonged. Meanwhile, the graphene layer also has good temperature resistance, excellent heat conductivity and conductivity, and the temperature resistance and the antistatic capability of the display panel can be improved.
In an embodiment, fig. 3 is a schematic diagram of a film structure of another alternative implementation of a display panel according to an embodiment of the present invention, as shown in fig. 3, in a graphene composite substrate 101, organic base layers 1011 and graphene layers 1012 are alternately stacked and arranged. The figure only illustrates that two organic substrate layers 1011 are separated by a graphene layer 1012, and optionally, a plurality of graphene layers 1012 are separated between the two organic substrate layers 1011. In this embodiment, the alternating stacking arrangement of the organic substrate layers and the graphene layers is similar to the packaging structure of the alternating stacking arrangement of the organic layers and the inorganic layers, and has a stronger water and oxygen blocking capability. In such an embodiment, each organic substrate layer can be made relatively thin, such that the alternating stack achieves effective water and oxygen barrier without increasing the thickness of the panel.
In another embodiment, in the graphene composite substrate, the organic base layers and the graphene layers are alternately stacked, and the graphene layer is on the outer surface of the graphene composite substrate on the side away from the display surface of the display panel. Which are not illustrated in the drawings. Utilize organic stratum basale and graphite alkene layer to pile up the range structure in turn and realize effectively separating the life that water oxygen promoted light emitting device among this embodiment, simultaneously, the graphite alkene layer in the outside has very good self-lubricating performance, can promote the wearability of display panel substrate.
As illustrated in fig. 1, in the graphene composite substrate 101, the graphene layer 1012 is located on the side of the organic base layer 1011 near the array layer 102. In the panel manufacturing process, firstly, a graphene composite substrate is manufactured on a rigid substrate; then sequentially manufacturing an array layer, a display layer and a packaging structure on the graphene composite substrate; and finally, separating the manufactured display panel from the rigid substrate. The electrostatic charges generated during the panel manufacturing process, especially when the panel is separated from the rigid substrate, may damage the devices in the array layer, which may affect the yield of the product. The graphene layer in the graphene composite substrate has good conductivity, can play a role in electrostatic protection on the display panel, and can reduce the risk that the display panel is damaged by electrostatic charges in the manufacturing process, so that the product yield is improved. The following description of the embodiments of the manufacturing method of the display panel can be referred to.
With continued reference to fig. 1 or fig. 3, the display panel further includes an insulating layer 105, the insulating layer 105 being located between the graphene layer 1012 and the array layer 102. The insulating layer 105 is made of any one of silicon oxide and silicon nitride, fig. 1 illustrates that the display panel includes a graphene composite substrate 101, wherein the graphene layer 1012 is located on one side of the organic substrate layer 1011 close to the array layer 102, and the insulating layer 105 is disposed between the graphene layer 1012 and the array layer 102. As illustrated in fig. 3, in the graphene composite substrate 101, the graphene layers 1012 and the organic base layers 1011 are alternately stacked, and the insulating layer 105 is disposed between the graphene layer 1012 closest to the array layer 102 and the array layer 102. In this embodiment, an insulating layer is disposed between the graphene layer and the array layer, that is, when the display panel is manufactured, the insulating layer is first manufactured on the graphene layer of the graphene composite substrate, and then the array layer is manufactured on the insulating layer. Because the graphene layer has good conductivity, the graphene layer can be prevented from being in direct contact with a transistor device in the array layer through the arrangement of the insulating layer, and the stability of the switching performance of the transistor is influenced.
In one embodiment, the encapsulation structure includes at least one organic layer and at least one inorganic layer stacked on each other. Can refer to the above illustration in fig. 1, organic layer and inorganic layer alternate setting in packaging structure, and wherein, the compactness height of inorganic layer can realize the effect of fine separation water oxygen, and organic layer has fine pliability, can promote packaging structure's anti bending property, adopts this kind of packaging structure can realize making flexible display panel.
In an embodiment, fig. 4 is a schematic diagram of another alternative implementation of the display panel according to the embodiment of the present disclosure. As shown in fig. 4, the graphene layer 1012 is on the side of the organic substrate layer 1011 away from the array layer 102. In the manufacturing of the display panel, an organic base layer may be first formed on a rigid substrate, then an array layer, a display layer and an encapsulation structure are sequentially formed on the organic base layer, then the organic base layer is separated from the rigid substrate, and finally a graphene layer is formed on the side of the organic base layer away from the array layer, so as to form the display panel including the graphene composite substrate. Graphene layer can restore the damage that organic substrate layer caused when separating with the rigid substrate, in addition, because graphite alkene has very good self-lubricating property to can promote the wearability of display panel substrate. Meanwhile, the graphene layer can be used for separating water and oxygen on one side of the display panel substrate, and the service life of the light-emitting device is prolonged. The graphene layer also has good temperature resistance, excellent heat conductivity and conductivity, and the temperature resistance and the antistatic capability of the display panel can be improved.
As shown in fig. 4, an insulating layer 106 is further disposed between the graphene composite substrate 101 and the array layer 102, that is, the insulating layer 106 is disposed between the organic base layer 1011 and the array layer 102, and a material for fabricating the insulating layer 106 includes any one of silicon oxide or silicon nitride, which can increase stability of bonding between the array layer and the substrate.
In an embodiment, fig. 5 is a schematic diagram of another alternative implementation of the display panel according to the embodiment of the present disclosure. As shown in FIG. 5, the graphene composite substrate 101 includes n graphene layers 1011 stacked layer by layer, where n is greater than or equal to 2 and less than or equal to 5, and n is an integer. When preparation individual layer graphite alkene layer, because the problem of production technology, individual layer graphite alkene layer may have the defect, including multilayer graphite alkene layer in the graphite alkene composite substrate in this embodiment, can reduce the risk that graphite alkene layer has the defect through preparation multilayer graphite alkene layer, realize effectual separation water oxygen in display panel substrate one side to and the realization is to display panel's electrostatic protection effect. When the number of graphene layers is too large, the effect of increasing the number of graphene layers to make up for defects is not obvious any more, and the complexity of the panel manufacturing process can be increased. In the embodiment, the number of graphene layers in one graphene composite substrate is controlled between 2 and 5 (including end values), so that water and oxygen separation and electrostatic protection can be effectively realized, and the process difficulty can be reduced.
The embodiments of fig. 4 and 5 are merely illustrated with the encapsulation structure including at least one organic layer and at least one inorganic layer. Alternatively, the above embodiments are also applicable to other types of package structures, and are not illustrated in the drawings.
Based on the same inventive concept, the embodiment of the present invention further provides a manufacturing method of a display panel, which can be used for manufacturing the display panel provided by the above embodiment, and the embodiments of the display panel and the manufacturing method of the display panel can be understood by referring to each other.
Fig. 6 is a schematic flow chart of an alternative implementation of a manufacturing method of a display panel according to an embodiment of the present invention, and as shown in fig. 6, the manufacturing method includes:
step S101: manufacturing a graphene composite substrate 101 on a rigid substrate B, wherein the graphene composite substrate 101 comprises an organic base layer 1011 and at least one graphene layer 1012; fig. 6 illustrates only one graphene layer 1012. Optionally, the organic substrate layer is made of any one of polyimide and polyethylene terephthalate. In this step, in one embodiment, one graphene layer is fabricated on top of the organic substrate layer at the time of fabrication. In another embodiment, two or more graphene layers are fabricated sequentially on top of an organic substrate layer. In addition, in some embodiments, one graphene composite substrate is fabricated on top of a rigid substrate. In other embodiments, two or more graphene composite substrates stacked on top of each other are sequentially fabricated on a rigid substrate.
Step S102: sequentially manufacturing an array layer 102, a display layer 103 and a packaging structure 104 on a graphene composite substrate 101; the array layer 102, the display layer 103 and the package structure 104 are shown for simplicity, and for the specific structure, reference may be made to the description of the display panel embodiment.
Step S103: after completing the fabrication of the package structure 104, the method further includes: the graphene composite substrate 101 and the rigid substrate B are separated.
By adopting the manufacturing method provided by the embodiment of the invention, the array layer, the display layer and the packaging structure are manufactured on the graphene composite substrate. The graphene composite substrate comprises at least one graphene layer, the graphene layer has good conductivity, and the risk that the display panel is damaged by static charges in the manufacturing process can be reduced, so that the product yield is improved. Meanwhile, the graphene molecules in the graphene layer are stable in structure and have excellent water repellency, so that water and oxygen can be blocked on one side of the display panel substrate, and the service life of the light-emitting device is prolonged.
Optionally, the manufacturing method further includes: a coating separation layer is manufactured on a rigid substrate, and then a graphene composite substrate is manufactured on the separation layer. The separating layer can ensure that the graphene composite substrate is completely separated from the rigid base plate when the graphene composite substrate and the rigid base plate are separated, and damage to the graphene composite substrate caused by a separation process is avoided.
Further, fig. 7 is a flowchart of another alternative implementation of the manufacturing method of the display panel according to the embodiment of the present invention. As shown in fig. 7, the step S101 of manufacturing a graphene composite substrate on a rigid substrate specifically includes:
step S1011: coating an organic base layer on a rigid substrate;
step S1012: and carrying out surface treatment on the organic base layer by adopting a graphene oxide solution to obtain the rigid substrate with the graphene oxide layer compounded on the surface of the organic base layer.
Step S1013: and reducing the graphene oxide layer by adopting a reduction process to form the graphene composite substrate.
Firstly, carrying out surface treatment on an organic basal layer by adopting a graphene oxide solution, forming a graphene oxide layer on the surface of the organic basal layer, then reducing the graphene oxide layer into a graphene layer by using a reduction process, and forming the graphene layer on the surface of the organic basal layer, thereby combining the graphene layer with the organic basal layer to form a graphene composite substrate. And then sequentially manufacturing an array layer, a display layer, a packaging structure and the like on the graphene composite substrate. The graphene composite substrate in the embodiment is simple and easy to manufacture, and the graphene layer has good conductivity, so that the risk that the display panel is damaged by static charges in the manufacturing process can be reduced, and the product yield is improved. Simultaneously, the graphene molecule structure in the graphene layer is stable, and the graphene layer has excellent water repellency, and the graphene layer can separate water and oxygen on one side of the substrate of the display panel by adopting the display panel manufactured by the embodiment, so that the service life of the light-emitting device is prolonged.
Further, fig. 8 is a flowchart of another alternative implementation of the manufacturing method of the display panel according to the embodiment of the present invention. As shown in fig. 8, the surface treatment of the organic substrate layer with the graphene oxide solution in step S1012 includes:
step a: coating a graphene oxide solution on the surface of the organic base layer to obtain a rigid substrate coated with the graphene oxide solution on the surface of the organic base layer; in this step, the organic base layer may be surface-treated by any one of a spray coating method, a spin coating method, and a dipping method. The graphene oxide solution may be a graphene oxide aqueous solution, and the graphene oxide solution contains a large amount of hydrophilic groups (-OH, -COOH) and oxygen groups (ether groups), and is easy to form hydrogen bonds with structures in the organic substrate layer (for example, hydrogen bonds with amino groups in a polyimide structure), so that the graphene oxide is easy to be adsorbed on the surface of the organic substrate layer to form a single layer of graphene oxide.
Step b: and c, placing the rigid substrate obtained in the step a at 80 ℃, and drying for 6h in vacuum to obtain the rigid substrate with the graphene oxide layer compounded on the surface of the organic substrate layer. In this step, free water molecules in the graphene oxide solution can be removed, so that a graphene oxide layer is formed on the surface of the organic substrate layer.
After the organic substrate layer is subjected to surface treatment by the processes of the step a and the step b, a monolayer graphene oxide layer can be formed on the surface of the organic substrate layer, and the thickness of the graphene oxide layer is less than or equal to 1 μm. And c, after the step b, reducing the graphene oxide into graphene by adopting a reduction process, so that a monolayer graphene layer is formed on the surface of the organic substrate layer.
The process is simple to manufacture, the flexibility is high, and when the multilayer graphene oxide layer needs to be manufactured, the process of simply coating the graphene oxide solution repeatedly and performing vacuum drying can be used for manufacturing the multilayer graphene oxide on the organic substrate layer.
Further, an embodiment of the present invention further provides a method for manufacturing a graphene composite substrate including multiple graphene layers, and fig. 9 is a flowchart of another alternative implementation manner of the method for manufacturing a display panel according to the embodiment of the present invention. As shown in fig. 9, the manufacturing method includes:
step c: coating a graphene oxide solution on the surface of a graphene oxide layer of a rigid substrate with m graphene oxide layers compounded on the surface of an organic substrate layer, wherein m is a positive integer greater than or equal to 1;
step d: c, placing the rigid substrate obtained in the step c at 80 ℃, and drying in vacuum for 6h to obtain the rigid substrate with the m +1 graphene oxide layers compounded on the surface of the organic substrate layer;
step e: and d, placing the rigid substrate obtained in the step d under the pressure of 1-2MPa for processing for 2-3 s. Because the surface of the graphene oxide contains a large amount of-OH and-COOH groups, in the step e process, stronger hydrogen bond acting force can be formed between the layers of the two adjacent graphene oxide layers, so that the graphene oxide layers and the graphene oxide layers are subjected to composite self-assembly.
When m is 1, two graphene oxide layers are formed on the organic substrate layer after the above steps c, d and e. When m is 2, after the above steps c, d and e, a tri-layer graphene oxide layer is formed on the organic substrate layer. And so on. In the embodiment, the rigid substrate comprising two or more layers of graphene oxide is treated under the negative pressure condition, so that the graphene oxide layer and the graphene oxide layer are subjected to composite self-assembly, and the interlayer bonding force between the graphene oxide layer and the graphene oxide layer is strong and the bonding is firm. Meanwhile, two or more layers of graphene oxide can correspondingly form two or more layers of graphene layers after a subsequent reduction process, the risk that the graphene layers have defects can be reduced, effective water and oxygen separation is realized on one side of a display panel substrate, and the electrostatic protection effect on the display panel is realized.
In one embodiment, before the step e, the method further comprises: repeating the steps c and d at least once in sequence. And c, repeating the step c and the step d one time in sequence, and correspondingly adding a graphene oxide layer on the organic substrate layer. The fabrication of a multi-layered graphene oxide layer on top of an organic substrate layer can be achieved by repeating steps c and d. In practice, the number of times of repeating the steps c and d can be selected according to the requirement of the number of graphene layers in the graphene composite substrate of the display panel. The display panel illustrated in fig. 5 can be manufactured according to this embodiment.
Further, before the step S1012 of performing the surface treatment on the organic substrate layer by using the graphene oxide solution, the method further includes: a graphene oxide solution is prepared, and fig. 10 is a flowchart of preparing the graphene oxide solution according to the embodiment of the present invention. As shown in fig. 10, the method specifically includes:
step S10121: carrying out oxidation treatment on graphite to obtain graphene oxide;
step S10122: dissolving graphene oxide in water, and carrying out ultrasonic treatment for 3 hours, wherein the power of ultrasonic equipment is 80-100W, so as to obtain a graphene oxide solution; wherein the concentration of the graphene oxide solution is 0.1-1 mg/ml.
This embodiment provides a method for preparing a graphene oxide solution, which can uniformly disperse graphene oxide in water after ultrasonic treatment, thereby achieving uniform coating when the graphene oxide solution is coated on an organic substrate layer. Meanwhile, the prepared graphene oxide solution meets a certain concentration range, the situation that the concentration is too high and is not beneficial to the realization of processes such as spraying, dipping or spin-coating is avoided, and the situation that after one layer of graphene oxide solution is coated due to too low concentration, a complete graphene oxide layer cannot be formed after water molecules are evaporated is also avoided, so that the prepared single-layer graphene oxide layer has defects. By adopting the method, the risk that the graphene layer manufactured subsequently has defects can be reduced.
Further, in step S1013, the reduction process is used to reduce the graphene oxide layer, and specifically includes: and carrying out infrared laser treatment on the rigid substrate with the graphene oxide layer compounded on the surface of the organic substrate layer, wherein the power of a laser emitting infrared laser is 60-90W, and the scanning speed of the laser is 40-60 cm/min. Infrared laser can penetrate two layers or more than two layers of graphene oxide layers stacked in sequence, and graphene oxide layers are reduced to graphene. The infrared laser reduction process does not introduce other reducing agents to influence the performance of the graphene, the power and the scanning speed of a laser in the reduction method can be used for efficiently reducing the graphene oxide layer into the graphene, and the process is simple and easy to implement.
Further, another manufacturing method is provided in an embodiment of the present invention, in the display panel manufactured by the manufacturing method, the organic substrate layers and the graphene layers in the graphene composite substrate are alternately stacked and arranged.
Specifically, in one embodiment, the manufacturing method comprises the following steps of:
step a: coating a graphene oxide solution on the surface of the organic base layer to obtain a rigid substrate coated with the graphene oxide solution on the surface of the organic base layer;
step b: and c, placing the rigid substrate obtained in the step a at 80 ℃, and drying for 6h in vacuum to obtain the rigid substrate with the graphene oxide layer compounded on the surface of the organic substrate layer.
Step q: continuously coating an organic substrate layer on the surface of the graphene oxide layer;
step a: continuously coating the graphene oxide solution on the surface of the organic substrate layer;
step b: and c, placing the rigid substrate obtained in the step a at 80 ℃, and drying for 6h in vacuum.
In this embodiment, after completion of step q, steps a and b are repeated at least once in sequence.
Specifically, in another embodiment, the manufacturing method comprises the following steps of:
step c: coating a graphene oxide solution on the surface of a graphene oxide layer of a rigid substrate with the graphene oxide layer compounded on the surface of an organic base layer;
step d: c, placing the rigid substrate obtained in the step c at 80 ℃, and drying for 6 hours in vacuum;
step e: and d, placing the rigid substrate obtained in the step d under the pressure of 1-2MPa for processing for 2-3 s.
Step q: continuously coating the organic base layer on the surface of the graphene oxide layer of the rigid substrate obtained in the step e;
step a: coating a graphene oxide solution on the surface of the organic substrate layer;
step b: and c, placing the rigid substrate obtained in the step a at 80 ℃, and drying for 6h in vacuum.
Step c: coating a graphene oxide solution on the surface of a graphene oxide layer of a rigid substrate with the graphene oxide layer compounded on the surface of an organic base layer;
step d: c, placing the rigid substrate obtained in the step c at 80 ℃, and drying for 6 hours in vacuum;
step e: and d, placing the rigid substrate obtained in the step d under the pressure of 1-2MPa for processing for 2-3 s.
In this embodiment, after completion of step q, step a, step b, step c, step d and step e are repeated at least once in this order.
In the manufacturing method provided by the two embodiments, the organic base layer and the graphene oxide layer are alternately stacked and arranged on the rigid substrate, and a structure in which the organic base layer and the graphene oxide layer are alternately stacked and arranged is formed after the graphene oxide is reduced subsequently, the structure is similar to an encapsulation structure in which the organic layer and the inorganic layer are alternately stacked and arranged, and the water and oxygen blocking capability of the encapsulation structure is stronger. In such an embodiment, each organic substrate layer can be made relatively thin, such that the alternating stack achieves effective water and oxygen barrier without increasing the thickness of the panel. In addition, the manufacturing method can better prevent water and oxygen from entering in the manufacturing process, and can form a very flat substrate surface, and the surface flatness of the display structure manufactured on the graphene composite substrate is high.
Based on the same inventive concept, an embodiment of the present invention further provides a method for manufacturing a display panel, and fig. 11 is a schematic flow chart of another alternative implementation manner of the method for manufacturing a display panel according to the embodiment of the present invention. As shown in fig. 11, the manufacturing method includes:
step S201: an organic base layer 1011 is fabricated on a rigid substrate B,
step S202: sequentially manufacturing an array layer 102, a display layer 103 and an encapsulation structure 104 on an organic substrate layer 1011; the array layer 102, the display layer 103 and the package structure 104 are shown for simplicity, and for the specific structure, reference may be made to the description of the display panel embodiment.
Step S203: after completing the fabrication of the package structure 104, the method further includes: separating the organic base layer 1011 from the rigid substrate B;
step S204: carrying out surface treatment on one side of the organic substrate layer 1011, which is far away from the array layer 102, by using a graphene oxide solution, and compounding a graphene oxide layer X1012 on the surface of the organic substrate layer 1011, which is far away from the array layer 102;
step S205: the graphene oxide layer X1012 is reduced by a reduction process to obtain a display panel including the graphene composite substrate 101, where the graphene composite substrate 101 includes an organic base layer 1011 and at least one graphene layer 1012. Fig. 11 is only an illustration of fabricating a graphene layer on the side of the organic substrate layer away from the array layer. Optionally, two or more graphene layers are fabricated on the side of the organic substrate layer away from the array layer.
Optionally, the graphene oxide is reduced by using infrared laser, wherein the power of a laser emitting the infrared laser is 60-90W, and the scanning rate of the laser is 40-60 cm/min.
The display panel manufactured by the embodiment has the advantages that the graphene layer can repair damage caused by the separation of the organic base layer from the rigid substrate, and in addition, the graphene has very good self-lubricating performance, so that the wear resistance of the substrate of the display panel can be improved. Meanwhile, the graphene layer can be used for separating water and oxygen on one side of the display panel substrate, and further the service life of the light-emitting device is prolonged. The graphene layer also has good temperature resistance, excellent heat conductivity and conductivity, and the temperature resistance and the antistatic capability of the display panel can be improved.
Further, fig. 12 is a flowchart of another alternative implementation of the manufacturing method of the display panel according to the embodiment of the present invention. As shown in fig. 12, in step S204, the surface treatment is performed on the side of the organic substrate layer away from the array layer by using the graphene oxide solution, and the method includes:
step f: coating a graphene oxide solution on the surface of the organic substrate layer, which is far away from the array layer; the graphene oxide solution may be applied to the surface of the organic substrate layer by a spray coating method or a spin coating method. The process of preparing the graphene oxide solution can refer to the description in the above embodiments.
Step g: and f, placing the display panel obtained in the step f at 80 ℃, and drying in vacuum for 6h to obtain the display panel with the graphene oxide layer compounded on the surface of the organic substrate layer. In this step, free water molecules in the graphene oxide solution can be removed, so that a graphene oxide layer is formed on the surface of the organic substrate layer.
After the organic substrate layer is subjected to surface treatment by the processes of the step f and the step g, a monolayer graphene oxide layer can be formed on the surface of the organic substrate layer, and the thickness of the graphene oxide layer is less than or equal to 1 μm. And g, reducing the graphene oxide into graphene by adopting a reduction process, so that a graphene layer of a monomolecular layer is formed on the surface, far away from the array layer, of the organic substrate layer.
Above-mentioned process simple manufacture, the flexibility ratio is high, and when needs preparation multilayer oxidation graphite alkene layer, simple repeated coating oxidation graphite alkene solution and vacuum drying's process can realize making multilayer oxidation graphite alkene on the surface of keeping away from the array layer on organic stratum basale promptly.
Further, fig. 13 is a flowchart of another alternative implementation of the manufacturing method of the display panel according to the embodiment of the present invention. As shown in fig. 13, the manufacturing method includes:
step h: coating a graphene oxide solution on the surface of a graphene oxide layer of a display panel with a p-layer graphene oxide layer compounded on the surface of an organic substrate layer, wherein p is a positive integer greater than or equal to 1;
step i: placing the display panel obtained in the step h at 80 ℃, and performing vacuum drying for 6h to obtain the display panel with the p +1 graphene oxide layer compounded on the surface of the organic substrate layer; the vacuum drying temperature in the step can effectively remove moisture in the graphene oxide solution, and meanwhile, the degradation influence on a transistor device in the array layer and a light-emitting device in the display layer is avoided.
Step j: and (e) placing the display panel obtained in the step i under the pressure of 1-2MPa for 2-3 s. Because the surface of the graphene oxide contains a large number of-OH and-COOH groups, in the process of step j, stronger hydrogen bond acting force can be formed between the layers of two adjacent graphene oxide layers, so that the graphene oxide layers and the graphene oxide layers are subjected to composite self-assembly.
When p is 1, after the steps h, i and j, two graphene oxide layers are formed on the side of the organic substrate layer away from the array layer. When p is 2, after the steps h, i and j, a three-layer graphene oxide layer is formed on the side of the organic substrate layer far away from the array layer. And so on. Through handling the display panel including two-layer or two-layer above oxidation graphite alkene under the negative pressure condition in this embodiment, realize carrying out compound self assembly between oxidation graphite alkene layer and the oxidation graphite alkene layer, then the cohesion between oxidation graphite alkene layer and the oxidation graphite alkene layer is strong, combines firmly. Meanwhile, two or more layers of graphene oxide can correspondingly form two or more layers of graphene layers after a subsequent reduction process, the risk that the graphene layers have defects can be reduced, effective water and oxygen separation is realized on one side of a display panel substrate, and the electrostatic protection effect on the display panel is realized.
Further, before step j, the method further comprises: repeating the step h and the step i at least once in sequence. And e, repeating the step h and the step i one time in sequence, and correspondingly adding a graphene oxide layer on the side, far away from the array layer, of the organic substrate layer. And (e) repeating the step h and the step i to manufacture the multilayer graphene oxide layer on the surface of the organic substrate layer. In practice, the number of times of repeating the step h and the step i can be selected according to the requirement of the number of graphene layers in the graphene composite substrate of the display panel. The multilayer graphene layer can reduce the risk that the graphene layer generates defects, realizes effective separation of water and oxygen on one side of the display panel substrate, prolongs the service life of a light-emitting device, repairs the damage caused by the organic base layer when the organic base layer is separated from the rigid base plate, and in addition, the graphene has very good self-lubricating performance, so that the wear resistance of the display panel substrate can be improved.
Further, another manufacturing method is provided in an embodiment of the present invention, in the display panel manufactured by the manufacturing method, the organic substrate layers and the graphene layers in the graphene composite substrate are alternately stacked and arranged.
Specifically, in one embodiment, the manufacturing method comprises the following steps of:
step f: and coating a graphene oxide solution on the surface of the organic substrate layer on the side far away from the array layer.
Step g: and f, placing the display panel obtained in the step f at 80 ℃, and drying in vacuum for 6h to obtain the display panel with the graphene oxide layer compounded on the surface of the organic substrate layer.
Step s: continuously coating an organic substrate layer on the surface of the graphene oxide layer;
step f: and coating a graphene oxide solution on the surface of the organic substrate layer on the side far away from the array layer.
Step g: and f, placing the display panel obtained in the step f at 80 ℃, and drying for 6 hours in vacuum.
In this embodiment, after completion of step s, steps f and g are repeated at least once in sequence.
Specifically, in another embodiment, the manufacturing method comprises the following steps of:
step h: coating a graphene oxide solution on the surface of a graphene oxide layer of a display panel with the graphene oxide layer compounded on the surface of an organic substrate layer;
step i: and (5) placing the display panel obtained in the step h at 80 ℃, and drying in vacuum for 6 h.
Step j: and (e) placing the display panel obtained in the step i under the pressure of 1-2MPa for 2-3 s.
Step s: continuing to coat the organic substrate layer on the surface of the graphene oxide layer of the display panel obtained in the step j;
step f: and coating a graphene oxide solution on the surface of the organic substrate layer on the side far away from the array layer.
Step g: and f, placing the display panel obtained in the step f at 80 ℃, and drying for 6 hours in vacuum.
Step h: coating a graphene oxide solution on the surface of a graphene oxide layer of a display panel with the graphene oxide layer compounded on the surface of an organic substrate layer;
step i: and (5) placing the display panel obtained in the step h at 80 ℃, and drying in vacuum for 6 h.
Step j: and (e) placing the display panel obtained in the step i under the pressure of 1-2MPa for 2-3 s.
In this embodiment, after completion of step s, step f, step g, step h, step i, and step j are repeated at least once in this order.
In the manufacturing method provided by the two embodiments, after the display panel is separated from the rigid substrate, the graphene oxide layer is manufactured on one side of the organic base layer of the display panel, which is far away from the array layer, and then the organic base layer is continuously coated on the graphene oxide layer, and finally the organic base layer and the graphene oxide layer which are alternately stacked and arranged are formed on one side of the substrate of the display panel, and then the graphene oxide is reduced by a subsequent process to form a structure in which the organic base layer and the graphene oxide layer are alternately stacked and arranged. The structure of the organic substrate layer and the graphene layer which are alternately stacked is similar to the packaging structure of the organic layer and the inorganic layer which are alternately stacked, and has strong water and oxygen blocking capacity. In such an embodiment, each organic substrate layer can be made thinner, so that the alternating stacking method can effectively block water and oxygen without increasing the thickness of the panel.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (20)
1. A display panel, comprising:
at least one graphene composite substrate comprising an organic base layer and at least one graphene layer;
an array layer over the graphene composite substrate, the array layer comprising a plurality of transistors;
the display layer is positioned on one side, away from the graphene composite substrate, of the array layer and comprises a plurality of light-emitting devices, and each light-emitting device comprises a first electrode, a light-emitting layer and a second electrode which are sequentially stacked on the array layer;
and the packaging structure is positioned on one side of the display layer, which is far away from the graphene composite substrate.
2. The display panel according to claim 1,
the graphene layer is located on one side of the organic substrate layer close to the array layer.
3. The display panel according to claim 2,
the graphene array further comprises an insulating layer, wherein the insulating layer is located between the graphene layer and the array layer.
4. The display panel according to claim 1,
the graphene layer is located on one side of the organic substrate layer, which is far away from the array layer.
5. The display panel according to claim 1,
the encapsulation structure includes at least one organic layer and at least one inorganic layer stacked on each other.
6. The display panel according to claim 1,
the graphene composite substrate comprises n graphene layers which are stacked layer by layer, wherein n is more than or equal to 2 and less than or equal to 5, and n is an integer.
7. The display panel according to claim 1,
in the graphene composite substrate, the organic base layers and the graphene layers are alternately stacked and arranged.
8. A method for manufacturing a display panel is characterized by comprising the following steps:
manufacturing a graphene composite substrate on a rigid substrate, wherein the graphene composite substrate comprises an organic base layer and at least one graphene layer;
sequentially manufacturing an array layer, a display layer and a packaging structure on the graphene composite substrate;
after the manufacturing of the packaging structure is completed, the method further comprises the following steps: and separating the graphene composite substrate from the rigid base plate.
9. The method for manufacturing a display panel according to claim 8,
the method for manufacturing the graphene composite substrate on the rigid substrate specifically comprises the following steps:
coating an organic base layer over the rigid substrate;
carrying out surface treatment on the organic base layer by using a graphene oxide solution to obtain a rigid substrate of which the surface of the organic base layer is compounded with a graphene oxide layer;
and reducing the graphene oxide layer by adopting a reduction process to form the graphene composite substrate.
10. The method for manufacturing a display panel according to claim 9,
performing surface treatment on the organic substrate layer with a graphene oxide solution includes:
step a: coating a graphene oxide solution on the surface of the organic base layer to obtain a rigid substrate coated with the graphene oxide solution on the surface of the organic base layer;
step b: and c, placing the rigid substrate obtained in the step a at 80 ℃, and drying for 6h in vacuum to obtain the rigid substrate with the graphene oxide layer compounded on the surface of the organic substrate layer.
11. The method for manufacturing a display panel according to claim 10,
step c: coating a graphene oxide solution on the surface of a graphene oxide layer of a rigid substrate with m graphene oxide layers compounded on the surface of the organic substrate layer, wherein m is a positive integer greater than or equal to 1;
step d: c, placing the rigid substrate obtained in the step c at 80 ℃, and drying in vacuum for 6h to obtain the rigid substrate with the m +1 graphene oxide layers compounded on the surface of the organic substrate layer;
step e: and d, placing the rigid substrate obtained in the step d under the pressure of 1-2MPa for processing for 2-3 s.
12. The method for manufacturing a display panel according to claim 11,
before step e, further comprising: repeating the steps c and d at least once in sequence.
13. The method for manufacturing a display panel according to claim 10 or 11, wherein the method for manufacturing further comprises the step q: continuously coating an organic substrate layer on the surface of the graphene oxide layer;
step q is carried out after step b is finished, and step a and step b are repeated at least once in sequence after step q is finished;
alternatively, step q is performed after step e is completed, and step a, step b, step c, step d, and step e are repeated at least once in order after step q is completed.
14. The method for manufacturing a display panel according to claim 9,
before the surface treatment of the organic substrate layer by using the graphene oxide solution, the method further comprises the following steps:
preparing a graphene oxide solution, specifically comprising:
carrying out oxidation treatment on graphite to obtain graphene oxide;
dissolving graphene oxide in water, and carrying out ultrasonic treatment for 3 hours, wherein the power of ultrasonic equipment is 80-100W, so as to obtain a graphene oxide solution; wherein the concentration of the graphene oxide solution is 0.1-1 mg/ml.
15. The method for manufacturing a display panel according to claim 9,
the method for reducing the graphene oxide layer by adopting the reduction process specifically comprises the following steps:
and carrying out infrared laser treatment on the rigid substrate with the graphene oxide layer compounded on the surface of the organic base layer, wherein the power of a laser emitting infrared laser is 60-90W, and the scanning speed of the laser is 40-60 cm/min.
16. A method for manufacturing a display panel is characterized by comprising the following steps:
an organic base layer is fabricated on a rigid substrate,
sequentially manufacturing an array layer, a display layer and a packaging structure on the organic substrate layer;
after the manufacturing of the packaging structure is completed, the method further comprises the following steps: separating the organic base layer and the rigid substrate;
carrying out surface treatment on one side of the organic substrate layer, which is far away from the array layer, by using a graphene oxide solution, and compounding a graphene oxide layer on the surface of the organic substrate layer, which is far away from the array layer;
and reducing the graphene oxide layer by adopting a reduction process to obtain the display panel comprising the graphene composite substrate, wherein the graphene composite substrate comprises an organic base layer and at least one graphene layer.
17. The method for manufacturing a display panel according to claim 16,
carrying out surface treatment on one side of the organic substrate layer far away from the array layer by adopting a graphene oxide solution, wherein the surface treatment comprises the following steps:
step f: coating a graphene oxide solution on the surface of the organic substrate layer, which is far away from the array layer;
step g: and f, placing the display panel obtained in the step f at 80 ℃, and drying in vacuum for 6h to obtain the display panel with the graphene oxide layer compounded on the surface of the organic substrate layer.
18. The method for manufacturing a display panel according to claim 17,
step h: coating a graphene oxide solution on the surface of a graphene oxide layer of a display panel with a p-layer graphene oxide layer compounded on the surface of the organic substrate layer, wherein p is a positive integer greater than or equal to 1;
step i: placing the display panel obtained in the step h at 80 ℃, and performing vacuum drying for 6h to obtain the display panel with the p +1 graphene oxide layer compounded on the surface of the organic substrate layer;
step j: and (e) placing the display panel obtained in the step i under the pressure of 1-2MPa for 2-3 s.
19. The method for manufacturing a display panel according to claim 18,
before step j, further comprising: repeating the step h and the step i at least once in sequence.
20. The method for manufacturing a display panel according to claim 17 or 18,
the manufacturing method further comprises the following steps: continuously coating an organic substrate layer on the surface of the graphene oxide layer;
step s is performed after step g is completed, and step f and step g are repeated at least once in sequence after step s is completed;
or, after completing the step j, performing the step s, and after completing the step s, repeating the step f, the step g, the step h, the step i and the step j at least once in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010061035.1A CN111244312A (en) | 2020-01-19 | 2020-01-19 | Display panel and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010061035.1A CN111244312A (en) | 2020-01-19 | 2020-01-19 | Display panel and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111244312A true CN111244312A (en) | 2020-06-05 |
Family
ID=70868668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010061035.1A Pending CN111244312A (en) | 2020-01-19 | 2020-01-19 | Display panel and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111244312A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114121383A (en) * | 2021-12-02 | 2022-03-01 | 上海大学 | Flexible electrode and preparation method and application thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627003A (en) * | 2012-02-13 | 2012-08-08 | 京东方科技集团股份有限公司 | Electrostatic protective film, display device and preparation method of electrostatic protective film |
| US20120282419A1 (en) * | 2010-01-15 | 2012-11-08 | Jonghyun Ahn | Graphene protective film serving as a gas and moisture barrier, method for forming same, and use thereof |
| US20130059155A1 (en) * | 2011-09-01 | 2013-03-07 | Industry-University Cooperation Foundation Hanyang University | Gas barrier thin film, electronic device including the same, and method of preparing gas barrier thin film |
| CN103337478A (en) * | 2013-06-26 | 2013-10-02 | 青岛海信电器股份有限公司 | Fabrication method of flexible organic electroluminescence diode display |
| CN104347820A (en) * | 2014-10-10 | 2015-02-11 | 信利（惠州）智能显示有限公司 | AMOLED (Active Matrix Organic Light Emitting Diode) device and preparation method |
| US20160315227A1 (en) * | 2015-04-21 | 2016-10-27 | Samsung Display Co., Ltd. | Display device and method of manufacturing the same |
| CN106206982A (en) * | 2016-08-11 | 2016-12-07 | 上海大学 | A kind of structure improving flexible substrates water and oxygen barrier property and preparation method thereof |
| CN106373986A (en) * | 2016-11-10 | 2017-02-01 | 上海天马微电子有限公司 | Display panel |
| CN206293441U (en) * | 2016-10-31 | 2017-06-30 | 上海天马有机发光显示技术有限公司 | Organic EL display panel and display device |
| CN109166881A (en) * | 2018-07-25 | 2019-01-08 | 深圳市华星光电半导体显示技术有限公司 | Flexible display apparatus and preparation method thereof |
-
2020
- 2020-01-19 CN CN202010061035.1A patent/CN111244312A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120282419A1 (en) * | 2010-01-15 | 2012-11-08 | Jonghyun Ahn | Graphene protective film serving as a gas and moisture barrier, method for forming same, and use thereof |
| US20130059155A1 (en) * | 2011-09-01 | 2013-03-07 | Industry-University Cooperation Foundation Hanyang University | Gas barrier thin film, electronic device including the same, and method of preparing gas barrier thin film |
| CN102627003A (en) * | 2012-02-13 | 2012-08-08 | 京东方科技集团股份有限公司 | Electrostatic protective film, display device and preparation method of electrostatic protective film |
| CN103337478A (en) * | 2013-06-26 | 2013-10-02 | 青岛海信电器股份有限公司 | Fabrication method of flexible organic electroluminescence diode display |
| CN104347820A (en) * | 2014-10-10 | 2015-02-11 | 信利（惠州）智能显示有限公司 | AMOLED (Active Matrix Organic Light Emitting Diode) device and preparation method |
| US20160315227A1 (en) * | 2015-04-21 | 2016-10-27 | Samsung Display Co., Ltd. | Display device and method of manufacturing the same |
| CN106206982A (en) * | 2016-08-11 | 2016-12-07 | 上海大学 | A kind of structure improving flexible substrates water and oxygen barrier property and preparation method thereof |
| CN206293441U (en) * | 2016-10-31 | 2017-06-30 | 上海天马有机发光显示技术有限公司 | Organic EL display panel and display device |
| CN106373986A (en) * | 2016-11-10 | 2017-02-01 | 上海天马微电子有限公司 | Display panel |
| CN109166881A (en) * | 2018-07-25 | 2019-01-08 | 深圳市华星光电半导体显示技术有限公司 | Flexible display apparatus and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114121383A (en) * | 2021-12-02 | 2022-03-01 | 上海大学 | Flexible electrode and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4856313B2 (en) | Environmental barrier material for organic light emitting device and method of manufacturing the same | |
| KR101345344B1 (en) | Organic led device | |
| US20200168839A1 (en) | Oled packaging method and oled packaging structure | |
| US6624568B2 (en) | Multilayer barrier region containing moisture- and oxygen-absorbing material for optoelectronic devices | |
| JP4896729B2 (en) | Electronic device with protective barrier stack | |
| WO2018157449A1 (en) | Organic electroluminescent display device and manufacturing method therefor | |
| RU2672102C2 (en) | Organic electroluminescent device | |
| JP5679565B2 (en) | Transparent conductive film, substrate with transparent conductive film, and organic electroluminescence device using the same | |
| WO2017096709A1 (en) | Groove structure for film-printing process and manufacturing method therefor | |
| CN106450035A (en) | A display panel and a manufacturing method thereof | |
| WO2004014644A1 (en) | Laminate having adherent layer and laminate having protective film | |
| TW200810587A (en) | Moisture barrier coatings for organic light emitting diode devices | |
| KR20120054021A (en) | Encapsulated optoelectronic device and method for making the same | |
| US20160365478A1 (en) | Nanostructure material stack-transfer methods and devices | |
| CN110571347B (en) | Display panel and preparation method thereof | |
| CN109088006B (en) | Flexible substrate and display panel | |
| US10217955B2 (en) | Method for manufacturing display panel, and display device | |
| KR20190010746A (en) | Light-emitting device and production method for light-emitting device | |
| CN112071998A (en) | Light-emitting device and display device | |
| CN111244312A (en) | Display panel and manufacturing method thereof | |
| CN109599496B (en) | Electroluminescent device, preparation method thereof and nanocrystalline ink | |
| EP3598502B1 (en) | Package structure, display panel and display device | |
| KR101405112B1 (en) | Organic light emitting diode device including graphene layer and graphene supporting layer | |
| WO2020228491A1 (en) | Oled display screen, display panel and preparation method therefor | |
| KR102188235B1 (en) | Manufacturing method of the organic light emitting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200605 |
|
| RJ01 | Rejection of invention patent application after publication |