CN108346747B - Print OLED device and its preparation method and application - Google Patents
Print OLED device and its preparation method and application Download PDFInfo
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- CN108346747B CN108346747B CN201710651649.3A CN201710651649A CN108346747B CN 108346747 B CN108346747 B CN 108346747B CN 201710651649 A CN201710651649 A CN 201710651649A CN 108346747 B CN108346747 B CN 108346747B
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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]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
-
- 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
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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
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
-
- 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
- H10K71/10—Deposition of organic active material
- H10K71/191—Deposition of organic active material characterised by provisions for the orientation or alignment of the layer to be deposited
Abstract
The present invention discloses a kind of preparation method for printing OLED device, comprising the following steps: S1, provides a substrate, the substrate is equipped with pixel defining layer, and the pixel defining layer is cheated with pixel corresponding with pixel；S2, organic functions Heisui River, dry organic functions film layer are deposited in the pixel is cheated using printing technology；S3, the substrate with the organic functions film layer is placed under electric field and is toasted；S4, step S2 and S3 are repeated, production forms multiple organic functions film layers；S5, top electrode is made according to a conventional method and is encapsulated to get printing OLED device.The method of the present invention passes through while high temperature bake, it is formed using the molecular dipole moment inside the organic functions film layer of electric field induction printing technology preparation horizontally arranged, to effectively improve the light extraction efficiency of device, and then effectively improve the performance of the OLED device of printing technology preparation, this method is simple and effective, easily operated.
Description
Technical field
The present invention relates to technical field of flat panel display, and in particular to a kind of printing OLED device and preparation method thereof.
Background technique
It is also known as organic due to Organic Light Emitting Diode (Organic Light Emitting Eiode, abbreviation OLED)
Electroluminance display has self-luminous (being not necessarily to backlight module) characteristic, OLED display screen is enabled to accomplish more frivolous, reaction
Faster, visual angle is wide, brightness is high, energy consumption is low, therefore OLED display screen is the Main way of current display technology research.
In recent years, printed electronic industry development is rapid, printing technology be considered as realize display panel large scale and it is low at
The effective way of this production.But in OLED device, about 80% light can be limited in device go out light and damage
Consumption, about only 20% light can be emitted to outside OLED device, and then cause light extraction efficiency not high；It can be seen that routine OLED
The light extraction efficiency of device is lower (about 20%), seriously constrains the development and application of OLED.So how to effectively improve OLED
The light extraction efficiency of device has become current industry key technology, but is only capable of limited raising from current process technological means
The light extraction efficiency of OLED device.
Therefore, the prior art remains to be further improved and develops.
Summary of the invention
Based on this, it is necessary to provide a kind of method for improving printing OLED display panel performance, it is aobvious to be mainly based upon OLED
It is horizontally arranged to show that the molecular dipole moment inside panel organic functions film layer is formed under the induction of horizontal component of electric field, improves OLED device
In interior lights extraction efficiency, thus effectively improve printing technology preparation OLED device performance.
A kind of preparation method for printing OLED device, comprising the following steps:
S1, a substrate is provided, the substrate is equipped with pixel defining layer, and the pixel defining layer has corresponding with pixel
Pixel hole；
S2, using printing technology in the pixel is cheated the organic functional ink of deposition, dry organic functions film layer；
S3, the substrate with the organic functions film layer is placed in progress bake (baking) under electric field；
S4, step S2 and S3 are repeated, production forms multiple organic functions film layers；
S5, top electrode is made according to a conventional method and is encapsulated to get the printing OLED device.
The above method is placed in progress high temperature bake, bake under strong electrical field by the organic functions film layer for making printing technology
Organic molecule handles relaxed state in the process, horizontally arranged so as to form molecular dipole moment under the induction of electric field, due to
Horizontally arranged molecular dipole moment can effectively improve the interior lights extraction efficiency in OLED device, to effectively improve printer
The OLED device performance of skill preparation.
Organic material in temperature T >=organic function layer of bake in the step S3 in one of the embodiments,
Glass transition temperature Tg；And in the temperature T of the baking < organic function layer organic material fusion temperature Tm.Preferably,
The range of the baking temperature T is Tg~Tg+10 DEG C.
Glass transition temperature refers to that high polymer is changed into the temperature of glassy state by elastomeric state, refer to amorphous polymer (including knot
Non-crystallized part in crystal form polymer) from glassy state to elastomeric state or from the latter to the former transition temperature, and without fixed
The minimum temperature of type polymer macromolecule segment free movement.
The time toasted in the step S3 in one of the embodiments, is 10min~60min.
Electric field is oriented parallel to the substrate in the step S3 in one of the embodiments, and the electric field is even
Strong electrical field.Preferably, direction of an electric field is horizontal direction in the step S3.
The electric field strength in the step S3 is 0.5kV/cm~5.0kV/cm in one of the embodiments,；Preferably,
The electric field strength is 1.5kV/cm~3kV/cm.
The organic functions ink is selected from hole injection layer material ink, hole transmission layer in one of the embodiments,
One of material ink, emitting layer material ink, electron transport layer materials ink, electron injecting layer material ink.
The printing technology in the step S2 is ink jet printing or silk-screen printing in one of the embodiments,.
The multiple organic functions film layer includes hole injection layer, hole transmission layer, shines in one of the embodiments,
At least two layers in layer, electron transfer layer or electron injecting layer.
The present invention also provides a kind of printing OLED device being prepared by the above method, in the printing OLED device
Organic functions film layer inside molecular dipole moment arrange in horizontal direction.
It is still a further object of the present invention is to provide a kind of display panel, the display panel includes printing of the present invention
OLED device；And the display device including display panel of the present invention.
Inventor is by numerous studies discovery, the main original for causing the light extraction efficiency of printing OLED device low in the prior art
Because being: the arrangement of the organic functions film layer interior molecules made by printing technology is mixed and disorderly unordered, and this mixed and disorderly nothing
The molecules align of sequence is unfavorable for the taking-up of the light inside OLED device；However when the molecules align in organic functions film layer exists centainly
Order when, i.e., when interior molecules form face-to-face pi-pi accumulation structure, this aspectant pi-pi accumulation structure is easy to form
Molecular dipole moment horizontally toward so that the light for being conducive to device inside takes out, and then improves the performance of entire device.
Therefore, inventor is dried after depositing each layer of organic functions ink, removes molten in organic functions ink
Agent forms organic functional film layer, is then placed in and carries out high temperature in the strong electrical field in substrate-parallel direction organic functions film layer
Bake guarantees that the bake temperature of every layer of organic functions film layer is not less than used organic function when preparing the organic functions film layer
The glass transition temperature of energy material, when the molecule in organic functions film layer is on glass transition temperature, strand or chain
Section is in transitory state, can carry out componental movement, and organic functional material master, the dipole moment on side chain are in horizontal strong electrical field at this time
Induction under carry out horizontal direction arrangement so that dipole moment in organic functions film layer forms the orderly row of horizontal direction
Column since the dipole moment of horizontal direction arrangement can effectively improve the light extraction efficiency inside OLED device, and then improve OLED
The performance of device.
Detailed description of the invention
Fig. 1 be an embodiment of the present invention print OLED device in the production process baking procedure when structural schematic diagram；
Wherein: 10 be heating device, and 21 be substrate, and 22 be pixel electrode, and 23 be pixel defining layer, and 24 be organic functions film
Layer, 30 be electric field generation device, and 40 be the electric field of horizontal direction；
Fig. 2 is the process flow chart that an embodiment of the present invention prints OLED device preparation method.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough
Comprehensively.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
As shown in Fig. 1~2, a kind of preparation method for printing OLED device includes the following steps:
S1, a substrate 21 is provided, the substrate 21 is equipped with pixel defining layer 23, and the pixel defining layer 23 has and picture
The corresponding pixel hole of element；
S2, using printing technology in pixel is cheated the organic functional ink of deposition, dry organic functions film layer 24；
S3, the substrate 21 with organic functions film layer is placed under the electric field 40 of horizontal direction and is toasted, electric field it is strong
Degree is 0.5kV/cm~5.0kV/cm；
S4, step S2 and S3 are repeated, production forms multiple organic functions film layers 24；
S5, top electrode is made according to a conventional method and is encapsulated to get printing OLED device.
In step S1, the substrate 21 provided has multiple pixel electrodes 22, and multiple pixel electrodes 22 constitute pixel electrode battle array
Column, the substrate 21 are equipped with pixel defining layer 23, and the pixel defining layer 23 is cheated with pixel corresponding with pixel, the picture
Expose the pixel electrode 22 in the bottom in element hole.
In step S2, the interior organic functional ink of injection is cheated toward the pixel using ink-jet printing technology, obtains liquid film；Its
Middle organic functions ink includes solvent and the organic functional material that is dissolved in solvent；Then using vacuum drying process to institute
It is dry into shape to state liquid film, obtains cured organic functions film layer.
Wherein organic functions ink be selected from HIL (hole injection layer) material ink, HTL (hole transmission layer) material ink,
One of EML (luminescent layer) material ink, ETL (electron transfer layer) EIL (electron injecting layer) material ink；Recycle vacuum
Dry method makes organic functions ink form a film, and obtains dry organic functions film layer.The selection of organic functions ink is basis
The organic function layer of required deposition is selected, selection hole injection layer material ink when such as printing hole injection layer.
It is appreciated that the method for printing OLED organic function layer can be the conventional methods such as ink jet printing or silk-screen printing.
Due to containing solvent in organic functions ink, so need the solvent removal in ink, therefore it is preferred that it is dry in heating
It is vacuum-treated while dry to remove the solvent in ink.It is appreciated that as long as organic functions ink can effectively be made to form a film
While other techniques for removing solvent therein can also be used.
In step S3, organic functions film layer is set 24 in the lower progress high-temperature baking of electric field 40 of horizontal direction, electric field strength
Range is 0.5kV/cm~5.0kV/cm, organic material in baking temperature T >=organic function layer of organic functions film layer 24
Glass transition temperature Tg；And in the temperature T of the baking < organic function layer organic material fusion temperature Tm.
Electric field in the present embodiment is provided by electric field generation device 30, and the electric field that electric field generation device 30 provides is level side
To electric field 40, electric field strength 2.0kV/cm；High-temperature baking is carried out by heating device 10, baking temperature range is 150 DEG C
~220 DEG C, baking time is 15min~30min.
It should be understood that organic functional material in the organic functions film layer that baking temperature and baking time toast as needed
Glass transition temperature (Tg) be configured, preferably the baking temperature range of organic functions film layer 24 is Tg~Tg+10
DEG C, baking time range is 10min~60min；Further, when baking preferably electric field strength range be 1.5kV/cm~
3kV/cm。
It is understood that direction of an electric field only needs satisfaction parallel with organic functions film layer, but wherein most preferred
Direction of an electric field is horizontal direction.
In step S4, S2 and S3 is repeated, makes and forms multiple organic functions film layers 24, in the present embodiment, multiple organic function
Energy film layer includes: HIL (hole injection layer), HTL (hole transmission layer), EML (luminescent layer) and ETL (electron transfer layer)；Preparation
When each layer of organic functions film layer, each layer function material ink is both needed to be dried by vacuum drying process, each organic
The baking temperature of functional film layer is not less than the glass transition temperature for preparing the organic functional material of the organic functions film layer, this
Field technical staff can carry out the setting of baking temperature according to the glass transition temperature of organic functional material, meanwhile, it is multiple
Which layer is organic functions film layer, which specifically include, to be determined according to the actual situation, may include such as HIL, HTL, EML, ETL
With one or more layers in EIL.
In step S5, after the deposition that above-mentioned steps complete each functional film layer of OLED, the deposition of top electrode is carried out, finally will
OLED device is packaged, and packaging technology can be selected from thin-film packages such as conventional cover board encapsulation or face encapsulation.
The embodiment of the present invention also provides a kind of printing OLED device being made using the above method, and including the print
The display panel and display device of brush OLED device.
As shown in Figure 1, the method for the present embodiment is the strong electrical field that horizontal direction is introduced in the process for carrying out high temperature bake,
When molecule is on glass transition temperature, strand or segment are not at stationary state, can be carried out componental movement, at this time
Dipole moment on organic functional material interior molecules master, side chain can carry out horizontal direction arrangement under the induction of horizontal strong electrical field,
So that the dipole moment in organic functions film layer forms the ordered arrangement of horizontal direction, due to the dipole moment of horizontal direction arrangement
Direction can effectively improve the light extraction efficiency inside final OLED device, and then improve the performance of entire printing OLED device.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. a kind of preparation method for printing OLED device, which comprises the steps of:
S1, a substrate is provided, the substrate is equipped with pixel defining layer, and the pixel defining layer has pixel corresponding with pixel
Hole；
S2, organic functional ink is deposited in the pixel is cheated using printing technology, is dried to obtain organic functions film layer；
S3, the substrate with the organic functions film layer is placed under electric field and is toasted；The electric field is oriented parallel to institute
Substrate is stated, temperature T >=organic functions of baking described in the fusion temperature Tm > of organic material in the organic functions film layer
The glass transition temperature Tg of organic material in film layer, the intensity of the electric field are 0.5kV/cm~5.0kV/cm, the baking when
Between be 10min~60min；
S4, step S2 and S3 are repeated, production forms multiple organic functions film layers；
S5, production top electrode simultaneously encapsulate to get the printing OLED device.
2. the preparation method of printing OLED device as described in claim 1, which is characterized in that temperature T≤institute of the baking
Tg+10 DEG C of glass transition temperature for stating organic material in organic functions film layer.
3. the preparation method of printing OLED device as described in claim 1, which is characterized in that the electric field is uniform electric field.
4. the preparation method of printing OLED device as described in claim 1, which is characterized in that the intensity of the electric field is
1.5kV/cm~3kV/cm.
5. the preparation method of the printing OLED device as described in Claims 1 to 4 is any, which is characterized in that in the step S2
Printing technology be ink jet printing or silk-screen printing.
6. the preparation method of the printing OLED device as described in Claims 1 to 4 is any, which is characterized in that the multiple organic
Functional film layer includes at least two layers in hole injection layer, hole transmission layer, luminescent layer, electron transfer layer or electron injecting layer.
7. a kind of printing OLED device, which is characterized in that the printing OLED device is any described by claim 1~6
What preparation method obtained.
8. a kind of display panel, which is characterized in that including printing OLED device as claimed in claim 7.
9. a kind of display device, which is characterized in that including display panel according to any one of claims 8.
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| CN201710651649.3A CN108346747B (en) | 2017-08-02 | 2017-08-02 | Print OLED device and its preparation method and application |
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| CN201710651649.3A CN108346747B (en) | 2017-08-02 | 2017-08-02 | Print OLED device and its preparation method and application |
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| CN108346747B true CN108346747B (en) | 2019-06-11 |
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| CN113410419A (en) * | 2021-08-18 | 2021-09-17 | 深圳市华星光电半导体显示技术有限公司 | Manufacturing method of display panel and drying equipment |
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| CN1876760A (en) * | 2005-06-08 | 2006-12-13 | 富士胶片株式会社 | Composition for nonlinear optical material, optical element, nonlinear optical material, and process for producing the same |
| CN101383401A (en) * | 2008-10-13 | 2009-03-11 | 彩虹集团公司 | Preparation of polymer organic LED |
| CN104744896A (en) * | 2013-12-30 | 2015-07-01 | 中国科学院理化技术研究所 | Double chromophore complex system and synthetic method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080204966A1 (en) * | 2004-09-21 | 2008-08-28 | The Johns Hopkins University | Controlled Transport and Assembly of Nanostructures |
| KR101197060B1 (en) * | 2006-03-23 | 2012-11-06 | 삼성디스플레이 주식회사 | Apparatus and method for manufacturing display device |
| JP2012194313A (en) * | 2011-03-16 | 2012-10-11 | Toppan Printing Co Ltd | Method for flattening/hardening ink in aperture of patterning substrate, and flattening/hardening device |
| EP3147961A1 (en) * | 2015-09-28 | 2017-03-29 | Novaled GmbH | Organic electroluminescent device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1876760A (en) * | 2005-06-08 | 2006-12-13 | 富士胶片株式会社 | Composition for nonlinear optical material, optical element, nonlinear optical material, and process for producing the same |
| CN101383401A (en) * | 2008-10-13 | 2009-03-11 | 彩虹集团公司 | Preparation of polymer organic LED |
| CN104744896A (en) * | 2013-12-30 | 2015-07-01 | 中国科学院理化技术研究所 | Double chromophore complex system and synthetic method and application thereof |
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| Molecular orientation in small-molecule organic light-emitting diodes;Daisuke Yokoyama，J. Mater. Chem.;《J.Mater.Chem》;20111231;第19187-19202页 |
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