CN111799384A - Display panel, preparation method thereof and display device - Google Patents
Display panel, preparation method thereof and display device Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000000758 substrate Substances 0.000 claims abstract description 110
- 239000002346 layers by function Substances 0.000 claims abstract description 58
- 239000010410 layer Substances 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 21
- 239000003086 colorant Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000151 deposition Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000000605 extraction Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000010405 anode material Substances 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- 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
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/17—Carrier injection layers
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0002—Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping
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- 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
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
- H10K50/15—Hole transporting layers
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- 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
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
- H10K50/16—Electron transporting layers
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- 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
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/17—Carrier injection layers
- H10K50/171—Electron injection layers
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- 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
- H10K50/805—Electrodes
- H10K50/81—Anodes
- H10K50/813—Anodes characterised by their shape
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- 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
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/822—Cathodes characterised by their shape
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- H—ELECTRICITY
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- 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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
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- 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
Abstract
The application discloses a display panel, a preparation method thereof and a display device, which are used for improving the light emitting efficiency of the display panel. An embodiment of the present application provides a display panel, display panel includes: a substrate base plate; the display panel is provided with a plurality of sub-pixels; the sub-pixel includes: an anode, a light-emitting functional layer and a cathode which are sequentially stacked on the substrate; a first contact surface is arranged between the light-emitting functional layer and the anode, and a second contact surface is arranged between the light-emitting functional layer and the cathode; in the sub-pixel, the first contact surface and the second contact surface each have a protrusion.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel, a preparation method of the display panel and a display device.
Background
Organic Light-Emitting Diode (OLED) Display products have been widely used in mobile phone Display screens and television panels due to their excellent features of high contrast, short response time, high color intensity, thinness, and flexibility, and are known as the next generation Display technology that is most likely to replace Liquid Crystal Display (LCD).
In the prior art, the surface plasma elementary effect is easily generated on the interface between the electrode of the OLED and other media, and the surface plasma elementary effect causes a large amount of light loss, resulting in low light extraction efficiency of the OLED.
Disclosure of Invention
The embodiment of the application provides a display panel, a preparation method thereof and a display device, which are used for improving the light emitting efficiency of the display panel.
An embodiment of the present application provides a display panel, display panel includes: a substrate base plate; the display panel is provided with a plurality of sub-pixels; the sub-pixel includes: an anode, a light-emitting functional layer and a cathode which are sequentially stacked on the substrate;
a first contact surface is arranged between the light-emitting functional layer and the anode, and a second contact surface is arranged between the light-emitting functional layer and the cathode; in the sub-pixel, the first contact surface and the second contact surface each have a protrusion.
According to the display panel provided by the embodiment of the application, the interface between the anode and the luminous functional layer and the interface between the cathode and the luminous functional layer are both provided with the bulges, so that the surface plasma element effect between the electrode and the luminous functional layer can be reduced, the light loss is reduced, and the light extraction efficiency of the display panel is improved.
Optionally, in each of the sub-pixels, the protrusion of the first contact surface and the protrusion of the second contact surface each include: and the curved surface at one side deviating from the substrate base plate is protruded.
Optionally, in each of the sub-pixels, the protrusion of the first contact surface and the protrusion of the second contact surface each include: the curved surface on one side facing the substrate base plate is convex.
Optionally, in each of the sub-pixels, the protrusion of the first contact surface and the protrusion of the second contact surface each include: the curved surface bulge is connected with the curved surface bulge which is deviated from one side of the substrate base plate and faces one side of the substrate base plate.
Optionally, in the sub-pixels with different colors, the maximum thicknesses of the protrusions are the same in a direction perpendicular to the substrate base plate, and the maximum widths of the protrusions are different in a direction parallel to a plane of the substrate base plate.
According to the display panel provided by the embodiment of the application, in the direction perpendicular to the substrate base plate, under the condition that the maximum thickness of the protrusions is the same, the maximum width of the protrusions is specifically arranged in the direction parallel to the plane of the substrate base plate according to the different light emitting colors of the sub-pixels, and the light emitting efficiency of each sub-pixel can be improved to the maximum extent.
Optionally, the sub-pixel comprises: a red sub-pixel, a blue sub-pixel, and a green sub-pixel;
in a direction parallel to the plane of the substrate, the maximum width of the protrusion in the red sub-pixel is greater than the maximum width of the protrusion in the green sub-pixel, and the maximum width of the protrusion in the green sub-pixel is greater than the maximum width of the protrusion in the blue sub-pixel.
Optionally, in the sub-pixels with different colors, the maximum thicknesses of the protrusions are different in a direction perpendicular to the substrate base plate, and the maximum widths of the protrusions are the same in a direction parallel to a plane of the substrate base plate.
According to the display panel provided by the embodiment of the application, in the direction parallel to the plane of the substrate base plate, under the condition that the maximum width of the protrusions is the same, the maximum thickness of the protrusions is specifically arranged in the direction perpendicular to the substrate base plate according to the different light emitting colors of the sub-pixels, and the light emitting efficiency of each sub-pixel can be improved to the maximum extent.
Optionally, between the substrate base plate and the anode, the display panel further includes: a planarization layer;
the surface of the planarization layer on one side close to the anode is provided with bulges corresponding to the sub-pixels one by one, and the bulges of the planarization layer comprise: the curved surface of the side of the substrate base plate is deviated from the curved surface of the side of the substrate base plate and/or the curved surface of the side of the substrate base plate is faced to the curved surface of the side of the substrate base plate.
The display panel provided by the embodiment of the application forms the bulge on the planarization layer, and then forms the anode, the light-emitting functional layer and the cathode on the planarization layer, so that the first contact surface and the second contact surface can have the bulge with the same shape and curvature as the planarization layer, the complex process for the anode and the light-emitting functional layer is not needed, the interface between the anode and the light-emitting functional layer and the interface between the cathode and the light-emitting functional layer can have the bulge, and the improvement of the light-emitting efficiency of the display panel can be realized under the condition that the process difficulty is not increased.
An embodiment of the present application further provides a manufacturing method of the display panel, where the method includes:
providing a substrate base plate;
an anode, a light-emitting functional layer and a cathode are sequentially formed on the substrate, wherein a first contact surface is arranged between the light-emitting functional layer and the anode, a second contact surface is arranged between the light-emitting functional layer and the cathode, and the first contact surface and the second contact surface are both provided with bulges.
According to the preparation method of the display panel, the bulges are formed on the interface between the anode and the luminous functional layer and the interface between the cathode and the luminous functional layer, so that the surface plasma element effect between the electrode and the luminous functional layer can be reduced, the light loss is reduced, and the light extraction efficiency of the display panel is improved.
Optionally, before forming an anode, a light-emitting functional layer, and a cathode in sequence on the base substrate, the method further includes:
depositing a planarization layer material on the substrate base plate, and forming a curved surface bulge facing one side of the substrate base plate and/or a curved surface bulge facing away from one side of the substrate base plate on the surface of the planarization layer facing away from one side of the substrate base plate by adopting a nano-imprinting process.
The method for manufacturing the display panel, provided by the embodiment of the application, adopts a nanoimprint technology to form the bulge facing to or deviating from one side of the substrate on the planarization layer, the technology is simple and easy to implement, and under the condition that the bulge is formed on the planarization layer, the anode, the light-emitting functional layer and the cathode are formed on the planarization layer subsequently, so that the first contact surface and the second contact surface can be provided with the bulges with the same shape and curvature as the planarization layer, the complex technology for the anode and the light-emitting functional layer is not needed, the interface between the anode and the light-emitting functional layer and the interface between the cathode and the light-emitting functional layer can be provided with the bulges, and the improvement of the light-emitting efficiency of the display panel can be realized under the condition that the difficulty of the.
The embodiment of the application provides a display device, and the display device comprises the display panel provided by the embodiment of the application.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another display panel provided in the embodiment of the present application;
fig. 3 is a schematic structural diagram of another display panel provided in the embodiment of the present application;
fig. 4 is a schematic structural diagram of another display panel provided in the embodiment of the present application;
fig. 5 to 7 are graphs showing the relationship between the light intensity and the wavelength corresponding to different maximum widths of protrusions in each sub-pixel when the display panel provided in the embodiment of the present application includes curved protrusions deviating from the substrate;
fig. 8 to 10 are graphs showing the relationship between the light-emitting intensity and the wavelength corresponding to different maximum widths of the protrusions in each sub-pixel when the display panel provided in the embodiment of the present application includes a curved protrusion facing the substrate;
fig. 11 to 13 are graphs showing the relationship between the light intensity and the wavelength corresponding to different maximum widths of protrusions in each sub-pixel when the display panel provided in the embodiment of the present application includes a curved protrusion away from the substrate base and a curved protrusion facing the substrate base;
fig. 14 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
fig. 15 is a schematic view of a manufacturing method of a display panel according to an embodiment of the present application.
Detailed Description
An embodiment of the present application provides a display panel, as shown in fig. 1, the display panel includes: a base substrate 1; the display panel has a plurality of sub-pixels 2; the sub-pixel 2 includes: an anode 3, a light-emitting functional layer 4 and a cathode 5 which are sequentially stacked on the substrate 1;
a first contact surface 6 is arranged between the light-emitting functional layer 4 and the anode 3, and a second contact surface 7 is arranged between the light-emitting functional layer 4 and the cathode 5; in the sub-pixel, the first contact surface 6 and the second contact surface 7 each have a protrusion.
According to the display panel provided by the embodiment of the application, the interface between the anode and the luminous functional layer and the interface between the cathode and the luminous functional layer are both provided with the bulges, so that the surface plasma element effect between the electrode and the luminous functional layer can be reduced, the light loss is reduced, and the light extraction efficiency of the display panel is improved.
Optionally, as shown in fig. 1, in each of the sub-pixels 2, the protrusion of the first contact surface 6 and the protrusion of the second contact surface 7 each include: and the curved surface of one side departing from the substrate base plate 1 is convex.
In fig. 1, the first contact surface and the second contact surface are illustrated as including a curved protrusion facing away from the substrate base, and in practical implementation, the first contact surface and the second contact surface may also include a plurality of curved protrusions facing away from the substrate base.
Or, optionally, as shown in fig. 2, in each of the sub-pixels 2, the protrusion of the first contact surface 6 and the protrusion of the second contact surface 7 each include: a curved surface bulge facing one side of the substrate base plate 1.
In fig. 2, the first contact surface and the second contact surface are illustrated as including a curved protrusion facing a side of the substrate base plate, and in practical implementation, the first contact surface and the second contact surface may also include a plurality of curved protrusions facing a side of the substrate base plate.
Or, optionally, as shown in fig. 3, in each of the sub-pixels 2, the protrusion of the first contact surface 6 and the protrusion of the second contact surface 7 each include: the curved surface of the side of the substrate base plate 1 is connected with the curved surface of the side of the substrate base plate 1, and the curved surface of the side of the substrate base plate 1 is connected with the curved surface of the side of the substrate base plate 1.
In fig. 3, the first contact surface and the second contact surface each include: the curved surface protrusion facing away from the substrate base and the curved surface protrusion facing towards the substrate base are exemplified, and in specific implementation, the first contact surface and the second contact surface may also include a plurality of curved surface protrusions facing towards the substrate base and a plurality of curved surface protrusions facing away from the substrate base.
In specific implementation, as shown in fig. 1 to 3, the curvatures of the curved protrusions included in the first contact surface and the second contact surface are the same.
Alternatively, as shown in fig. 1 to 3, between the substrate base plate 1 and the anode 3, the display panel further includes: a planarization layer 8;
the surface of the planarization layer 8 close to the anode 3 has protrusions corresponding to the sub-pixels 2 one by one, and the protrusions of the planarization layer 8 include: the curved surface of the side departing from the substrate base plate 1 and/or the curved surface of the side facing the substrate base plate 1.
As shown in fig. 1, the protrusions of the planarization layer 8 include curved protrusions on the side facing away from the substrate base plate. As shown in fig. 2, the projections of the planarizing layer 8 include curved projections on the side facing the substrate base plate. As shown in fig. 3, the projections of the planarization layer 8 include: the curved surface bulge is connected with the curved surface bulge which is deviated from one side of the substrate base plate 1 and faces one side of the substrate base plate 1. The curvatures of the protrusion of the planarization layer, the protrusion of the first contact surface, and the protrusion of the second contact surface are the same.
The display panel provided by the embodiment of the application forms the bulge on the planarization layer, and then forms the anode, the light-emitting functional layer and the cathode on the planarization layer, so that the first contact surface and the second contact surface can have the bulge with the same shape and curvature as the planarization layer, the complex process for the anode and the light-emitting functional layer is not needed, the interface between the anode and the light-emitting functional layer and the interface between the cathode and the light-emitting functional layer can have the bulge, and the improvement of the light-emitting efficiency of the display panel can be realized under the condition that the process difficulty is not increased.
Optionally, as shown in fig. 1 to fig. 3, the display panel provided in the embodiment of the present application further includes: a pixel definition layer 9 defining the area of the sub-pixels 2.
In specific implementation, the light-emitting functional layer includes an organic light-emitting layer, and may include a hole injection layer, a hole transport layer, an electron injection layer, and other film layers.
Optionally, a maximum thickness of the protrusion in a direction perpendicular to the substrate base is greater than 0 nanometer (nm) and equal to or less than 300 nm.
In a specific implementation, for the sub-pixels with different colors, the maximum thickness of the protrusion in the direction perpendicular to the substrate base plate and the maximum width of the protrusion in the direction parallel to the plane of the substrate base plate can be set in the following two ways.
The first method is as follows:
as shown in fig. 4, in the sub-pixels 2 with different colors, the maximum thickness h of the protrusion is the same in the direction perpendicular to the substrate 1, and the maximum width P of the protrusion is different in the direction parallel to the plane of the substrate 1.
Alternatively, as shown in fig. 4, the sub-pixel 2 includes: red subpixel R, blue subpixel B, and green subpixel G;
in a direction parallel to the plane of the substrate base plate 1, the maximum width P1 of the protrusion in the red sub-pixel R is greater than the maximum width P2 of the protrusion in the green sub-pixel G, and the maximum width P2 of the protrusion in the green sub-pixel G is greater than the maximum width P3 of the protrusion in the blue sub-pixel B.
According to the display panel provided by the embodiment of the application, in the direction perpendicular to the substrate base plate, under the condition that the maximum thickness of the protrusions is the same, the maximum width of the protrusions is specifically arranged in the direction parallel to the plane of the substrate base plate according to the different light emitting colors of the sub-pixels, and the light emitting efficiency of each sub-pixel can be improved to the maximum extent.
It should be noted that, in fig. 4, the example that the protrusions in different sub-pixels are all curved protrusions on a side away from the substrate base plate is taken as an example for illustration, and in a specific implementation, the protrusions in different sub-pixels may also be protrusions as shown in fig. 2 and fig. 3, and are not described herein again. In fig. 4, the maximum thicknesses h of the protrusions corresponding to different sub-pixels are the same, and the maximum widths P of the protrusions corresponding to different sub-pixels are different. In fig. 4, only the maximum thickness of the first contact surface protrusion in the direction perpendicular to the substrate base plate is labeled for illustration, and in fig. 4, the maximum width of the first contact surface protrusion and the maximum width of the second contact surface protrusion are the same in the same sub-pixel.
Next, the simulation results of the light extraction efficiency of the electroluminescent device having the protrusions will be described.
When the protrusions of the first contact surface and the protrusions of the second contact surface comprise curved protrusions departing from the substrate base plate, the maximum thickness h of the protrusions is 200 nm. For the red sub-pixel R, the relationship graph of the light intensity versus the wavelength corresponding to different maximum widths P1 is shown in fig. 5, and when P1 is 410nm, the light extraction efficiency of the red sub-pixel R is the highest. For the green sub-pixel G, the light intensity-wavelength relationship graph corresponding to different maximum widths P2 is shown in fig. 6, and when P2 is 310nm, the light extraction efficiency of the green sub-pixel G is the highest. Fig. 7 shows a graph of the intensity of light emitted from the blue sub-pixel B with different maximum widths P3, where when P3 is 230nm, the light emitting efficiency of the blue sub-pixel B is the highest.
When the protrusions of the first contact surface and the protrusions of the second contact surface comprise curved protrusions facing the substrate base plate, the maximum thickness h of the protrusions is 200nm, for the red sub-pixel R, a graph of the relationship between the light intensity and the wavelength corresponding to different maximum widths P1 is shown in fig. 8, and when P1 is 500nm, the light extraction efficiency of the red sub-pixel R is the highest. For the green sub-pixel G, the light intensity-wavelength relationship graph corresponding to different maximum widths P2 is shown in fig. 9, and when P2 is 300nm, the light extraction efficiency of the green sub-pixel G is the highest. Fig. 10 shows a graph of the intensity of light emitted from the blue sub-pixel B with different maximum widths P3, where when P3 is 230nm, the light emitting efficiency of the blue sub-pixel B is the highest.
The protrusions of the first contact surface and the protrusions of the second contact surface comprise: when the curved surface of the substrate base plate protrudes and the curved surface of the substrate base plate protrudes, the maximum thickness h of the protrusion is 200nm, for the red sub-pixel R, a graph of the relationship between the light intensity and the wavelength corresponding to different maximum widths P1 is shown in fig. 11, and when P1 is 600nm, the light extraction efficiency of the red sub-pixel R is the highest. For the green sub-pixel G, the light intensity-wavelength relationship graph corresponding to different maximum widths P2 is shown in fig. 12, and when P2 is 490nm, the light extraction efficiency of the green sub-pixel G is the highest. Fig. 13 shows a graph of the intensity of light emitted from the blue sub-pixel B with different maximum widths P3, where when P3 is 320nm, the light emitting efficiency of the blue sub-pixel B is the highest.
In specific implementation, the maximum width P1 of the protrusion in the red sub-pixel R may be, for example, 500 ± 100nm, the maximum width P2 of the protrusion in the green sub-pixel G may be, for example, 310 ± 100nm, and the maximum width P3 of the protrusion in the blue sub-pixel B may be, for example, 230 ± 100 nm.
The second method comprises the following steps:
as shown in fig. 14, in the sub-pixels of different colors, the maximum thickness h of the protrusions is different in the direction perpendicular to the substrate 1, and the maximum width P of the protrusions is the same in the direction parallel to the plane of the substrate 1.
According to the display panel provided by the embodiment of the application, in the direction parallel to the plane of the substrate base plate, under the condition that the maximum width of the protrusions is the same, the maximum thickness of the protrusions is specifically arranged in the direction perpendicular to the substrate base plate according to the different light emitting colors of the sub-pixels, and the light emitting efficiency of each sub-pixel can be improved to the maximum extent.
It should be noted that, in fig. 14, the example that the protrusions in different sub-pixels are all curved protrusions on a side away from the substrate base plate is taken as an example for illustration, and in a specific implementation, the protrusions in different sub-pixels may also be protrusions as shown in fig. 2 and fig. 3, and are not described herein again.
In fig. 14, the sub-pixel includes: the red sub-pixel R, the blue sub-pixel B and the green sub-pixel G are arranged in such a way that the maximum thickness h3 of the protrusions in the blue sub-pixel B is larger than the maximum thickness h1 of the protrusions in the red sub-pixel R in a direction perpendicular to the substrate base plate 1, the maximum thickness h1 of the protrusions in the red sub-pixel R is larger than the maximum thickness h2 of the protrusions in the green sub-pixel G, and the maximum widths P of the protrusions in the sub-pixels are the same in a direction parallel to the plane of the substrate base plate 1. In fig. 14, taking h3> h1> h2 as an example, in the specific implementation, when the maximum width P of the protrusion is determined, the maximum thickness of the protrusion in each sub-pixel can be selected according to actual needs, so as to improve the light extraction efficiency of each sub-pixel to the maximum extent. In fig. 14, only the maximum thickness of the first contact surface protrusion in the direction perpendicular to the substrate base plate is labeled for illustration, and in fig. 14, the maximum width of the first contact surface protrusion and the maximum width of the second contact surface protrusion are the same in the same sub-pixel.
Based on the same inventive concept, an embodiment of the present application further provides a method for manufacturing the display panel, as shown in fig. 15, the method includes:
s101, providing a substrate base plate;
s102, sequentially forming an anode, a light-emitting functional layer and a cathode on the substrate, wherein a first contact surface is arranged between the light-emitting functional layer and the anode, a second contact surface is arranged between the light-emitting functional layer and the cathode, and the first contact surface and the second contact surface are both provided with bulges.
According to the preparation method of the display panel, the bulges are formed on the interface between the anode and the luminous functional layer and the interface between the cathode and the luminous functional layer, so that the surface plasma element effect between the electrode and the luminous functional layer can be reduced, the light loss is reduced, and the light extraction efficiency of the display panel is improved.
Optionally, before forming an anode, a light-emitting functional layer, and a cathode in sequence on the base substrate, the method further includes:
depositing a planarization layer material on the substrate base plate, and forming a curved surface bulge facing one side of the substrate base plate and/or a curved surface bulge facing away from one side of the substrate base plate on the surface of the planarization layer facing away from one side of the substrate base plate by adopting a nano-imprinting process.
The method for manufacturing the display panel, provided by the embodiment of the application, adopts a nanoimprint technology to form the bulge facing to or deviating from one side of the substrate on the planarization layer, the technology is simple and easy to implement, and under the condition that the bulge is formed on the planarization layer, the anode, the light-emitting functional layer and the cathode are formed on the planarization layer subsequently, so that the first contact surface and the second contact surface can be provided with the bulges with the same shape and curvature as the planarization layer, the complex technology for the anode and the light-emitting functional layer is not needed, the interface between the anode and the light-emitting functional layer and the interface between the cathode and the light-emitting functional layer can be provided with the bulges, and the improvement of the light-emitting efficiency of the display panel can be realized under the condition that the difficulty of the.
Optionally, after forming the planarization layer, forming an anode, a light-emitting functional layer, and a cathode, including:
depositing an anode material on the planarization layer, and forming a pattern of an anode by using a patterning process;
evaporating a luminescent material on the anode to form a luminescent functional layer;
and evaporating a cathode material on the light-emitting functional layer to form a cathode.
The embodiment of the application also provides a display device which comprises the display panel provided by the embodiment of the application.
The display device provided in the embodiment of the present application may be, for example: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the present application. The display device can be implemented by referring to the above embodiments of the display panel, and repeated descriptions are omitted.
In summary, in the display panel and the manufacturing method thereof provided by the embodiment of the application, the display device has the protrusions on the interface between the anode and the light emitting functional layer and the interface between the cathode and the light emitting functional layer, so that the surface plasma element effect between the electrode and the light emitting functional layer can be reduced, the light loss is reduced, and the light extraction efficiency of the display panel is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (11)
1. A display panel, comprising: a substrate base plate; the display panel is provided with a plurality of sub-pixels; the sub-pixel includes: an anode, a light-emitting functional layer and a cathode which are sequentially stacked on the substrate;
a first contact surface is arranged between the light-emitting functional layer and the anode, and a second contact surface is arranged between the light-emitting functional layer and the cathode; in the sub-pixel, the first contact surface and the second contact surface each have a protrusion.
2. The display panel according to claim 1, wherein the protrusions of the first contact surface and the protrusions of the second contact surface in each of the sub-pixels comprise: and the curved surface at one side deviating from the substrate base plate is protruded.
3. The display panel according to claim 1, wherein the protrusions of the first contact surface and the protrusions of the second contact surface in each of the sub-pixels comprise: the curved surface on one side facing the substrate base plate is convex.
4. The display panel according to claim 1, wherein the protrusions of the first contact surface and the protrusions of the second contact surface in each of the sub-pixels comprise: the curved surface bulge is connected with the curved surface bulge which is deviated from one side of the substrate base plate and faces one side of the substrate base plate.
5. The display panel according to any one of claims 2 to 4, wherein the maximum thickness of the protrusions in the sub-pixels of different colors is the same in a direction perpendicular to the substrate base plate, and the maximum width of the protrusions is different in a direction parallel to the plane of the substrate base plate.
6. The display panel of claim 5, wherein the sub-pixels comprise: a red sub-pixel, a blue sub-pixel, and a green sub-pixel;
in a direction parallel to the plane of the substrate, the maximum width of the protrusion in the red sub-pixel is greater than the maximum width of the protrusion in the green sub-pixel, and the maximum width of the protrusion in the green sub-pixel is greater than the maximum width of the protrusion in the blue sub-pixel.
7. The display panel according to any one of claims 2 to 4, wherein the maximum thickness of the protrusions in the sub-pixels of different colors is different in a direction perpendicular to the substrate base plate, and the maximum width of the protrusions in a direction parallel to the plane of the substrate base plate is the same.
8. The display panel according to any one of claims 2 to 4, wherein between the substrate base plate and the anode, the display panel further comprises: a planarization layer;
the surface of the planarization layer on one side close to the anode is provided with bulges corresponding to the sub-pixels one by one, and the bulges of the planarization layer comprise: the curved surface of the side of the substrate base plate is deviated from the curved surface of the side of the substrate base plate and/or the curved surface of the side of the substrate base plate is faced to the curved surface of the side of the substrate base plate.
9. A method for manufacturing a display panel according to any one of claims 1 to 8, the method comprising:
providing a substrate base plate;
an anode, a light-emitting functional layer and a cathode are sequentially formed on the substrate, wherein a first contact surface is arranged between the light-emitting functional layer and the anode, a second contact surface is arranged between the light-emitting functional layer and the cathode, and the first contact surface and the second contact surface are both provided with bulges.
10. The method according to claim 9, wherein before sequentially forming an anode, a light-emitting function layer, and a cathode over the base substrate, the method further comprises:
depositing a planarization layer material on the substrate base plate, and forming a curved surface bulge facing one side of the substrate base plate and/or a curved surface bulge facing away from one side of the substrate base plate on the surface of the planarization layer facing away from one side of the substrate base plate by adopting a nano-imprinting process.
11. A display device comprising the display panel according to any one of claims 1 to 8.
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