CN109817656A - A kind of pixel defining layer and preparation method - Google Patents
A kind of pixel defining layer and preparation method Download PDFInfo
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- CN109817656A CN109817656A CN201711163186.2A CN201711163186A CN109817656A CN 109817656 A CN109817656 A CN 109817656A CN 201711163186 A CN201711163186 A CN 201711163186A CN 109817656 A CN109817656 A CN 109817656A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 113
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000004020 luminiscence type Methods 0.000 claims abstract description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 18
- 239000002904 solvent Substances 0.000 claims description 16
- 229920000642 polymer Polymers 0.000 claims description 13
- 238000007654 immersion Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052731 fluorine Inorganic materials 0.000 claims description 6
- 239000011737 fluorine Substances 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- -1 polysiloxanes Polymers 0.000 claims description 6
- 229920005570 flexible polymer Polymers 0.000 claims description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 4
- XEMRAKSQROQPBR-UHFFFAOYSA-N (trichloromethyl)benzene Chemical compound ClC(Cl)(Cl)C1=CC=CC=C1 XEMRAKSQROQPBR-UHFFFAOYSA-N 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 229920000402 bisphenol A polycarbonate polymer Polymers 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 125000001153 fluoro group Chemical group F* 0.000 claims description 2
- 229920000233 poly(alkylene oxides) Polymers 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims 1
- 150000002466 imines Chemical class 0.000 claims 1
- 229920002647 polyamide Polymers 0.000 claims 1
- 238000007641 inkjet printing Methods 0.000 abstract description 11
- 239000010410 layer Substances 0.000 description 136
- 239000000243 solution Substances 0.000 description 30
- 239000000758 substrate Substances 0.000 description 10
- 230000007423 decrease Effects 0.000 description 9
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 6
- 239000004642 Polyimide Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 229920001721 polyimide Polymers 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000002096 quantum dot Substances 0.000 description 4
- 230000027756 respiratory electron transport chain Effects 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229920002120 photoresistant polymer Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000010148 water-pollination Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 239000011850 water-based material Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- Electroluminescent Light Sources (AREA)
Abstract
The present invention discloses a kind of pixel defining layer and preparation method, and method includes: to provide original pixel defining layer, and the pixel defining layer has the groove for defining luminescence unit；The mold with boss is provided, the boss of the mold and the groove of the pixel defining layer coincide；The boss level is divided into upper and bottom section, and the outer diameter of the upper part is greater than the outer diameter of lower part, forms one layer of hydrophobic material in the side of the upper part, forms one layer of hydrophilic material in the side of the lower part；The boss of the mold is bonded with the groove of the pixel defining layer, groove side surface upper part point layer containing hydrophobic material, lower pixel defining layer of the part containing hydrophilic materials is prepared.Hydrophilic and hydrophobic material is coated in the side of mold convexity by the present invention, is then transferred to pixel defining layer groove side by mold, the pixel defining layer structure that part is hydrophobic, lower part is hydrophilic in acquisition, so as to improve the uniformity of ink-jet printing ink.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of pixel defining layers and preparation method.
Background technique
Inkjet printing technology can have been applied in light emitting diode (LED) display panel industry, needed in advance on substrate
The preparation for completing pixel defining layer in print procedure, (reduces coffee ring, horse in order to which ink to be effectively printed upon to substrate
Lang Geni stream influences), ink uniformity and resolution ratio are improved, pixel defining layer can be surface-treated, such as surface hydrophobe
Performance improvement.
Summary of the invention
The purpose of the present invention is to provide a kind of pixel defining layer and preparation methods, it is intended to solve existing pixel defining layer
Structure, the bad problem of uniformity after ink printed gets on.
Technical scheme is as follows:
A kind of preparation method of pixel defining layer, wherein comprising steps of
Original pixel defining layer is provided, the pixel defining layer has the groove for defining luminescence unit；
The mold with boss is provided, the boss of the mold and the groove of the pixel defining layer coincide；
The boss level is divided into upper and bottom section, and the outer diameter of the upper part is greater than the outer diameter of lower part, on described
Partial side forms one layer of hydrophobic material, forms one layer of hydrophilic material in the side of the lower part；
The boss of the mold is bonded with the groove of the pixel defining layer, groove side surface upper part point is prepared containing hydrophobicity
Material layer, lower pixel defining layer of the part containing hydrophilic materials.
The preparation method of the pixel defining layer, wherein the boss level is divided into upper and bottom section, it is described on
Partial outer diameter is greater than the outer diameter of lower part, one layer of hydrophobic material is formed in the side of the upper part, in the lower part
Side formed one layer of hydrophilic material method, comprising steps of
The boss is fully immersed in hydrophobic material solution, immersion depth is denoted as h1, forms one in the boss side surfaces
Layer hydrophobic material；
The boss is immersed in cleaning solution after taking-up, immersion depth is denoted as h2；
The boss is immersed in hydrophilic material solution after taking-up, immersion depth is denoted as h3, wherein h3 >=h2 > 0 h1 >,
H1>boss height, and h3<boss height form one layer of hydrophobic material in the side of the upper part, in the lower part
Side forms one layer of hydrophilic material.
The preparation method of the pixel defining layer, wherein the hydrophobic material solution is dissolved in by hydrophobic material
It is configured in one solvent；
The hydrophobic material is flexible polymer；
And/or first solvent is one of dimethylformamide and dimethyl sulfoxide or a variety of.
The preparation method of the pixel defining layer, wherein the flexible polymer is fluorine-containing polyolefin, fluorine-containing poly-
One of epoxyalkane and polysiloxanes are a variety of.
The preparation method of the pixel defining layer, wherein the hydrophilic material solution is dissolved in by hydrophilic material
It is configured in two solvents；
The hydrophilic material is rigid polymer；
And/or second solvent is one of dichlorotoleune, benzotrichloride and acetone or a variety of.
The preparation method of the pixel defining layer, wherein the rigid polymer is the polymerization containing alkyl in main chain
One of polymer containing annular rigid structure in object and main chain is a variety of.
The rigid polymer is polyimides or bisphenol-a polycarbonate.
The preparation method of the pixel defining layer, wherein by the recessed of the boss of the mold and the pixel defining layer
Slot fitting, and under the conditions of heating, ultrasonic vibration or ultraviolet irradiation, groove side surface upper part point is prepared containing hydrophobic material
Layer, lower pixel defining layer of the part containing hydrophilic materials.
The preparation method of the pixel defining layer, wherein the pixel defining layer with a thickness of 3-5 μm.
The preparation method of the pixel defining layer, wherein the groove side hydrophobic material of the pixel defining layer covers
Lid with a thickness of 1.5-2.5 μm.
A kind of pixel defining layer, wherein be prepared using the preparation method of pixel defining layer of the present invention.
The utility model has the advantages that the present invention is to be coated hydrophilic material on mold and hydrophobic material in the way of similar transfer
In pixel defining layer groove side, so that obtaining groove side surface upper part point contains hydrophobic material, hydrophily material is contained in lower part
The pixel defining layer of material, and then improve the uniformity after ink printed.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of original pixel defining layer provided by the invention.
Fig. 2 is the structural schematic diagram of pixel defining layer prepared by the present invention.
Fig. 3 is a kind of flow diagram of the preparation method of pixel defining layer provided by the invention.
Specific embodiment
The present invention provides a kind of pixel defining layer and preparation method, to make the purpose of the present invention, technical solution and effect more
Add clear, clear, the present invention is described in more detail below.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
The present invention provides a kind of preparation method of pixel defining layer, wherein comprising steps of
100, original pixel defining layer is provided, the pixel defining layer has the groove for defining luminescence unit；
200, the mold with boss is provided, the boss of the mold and the groove of the pixel defining layer coincide；
300, the boss level is divided into upper and bottom section, and the outer diameter of the upper part is greater than the outer diameter of lower part, in institute
The side for stating part forms one layer of hydrophobic material, forms one layer of hydrophilic material in the side of the lower part；
400, the boss of the mold is bonded with the groove of the pixel defining layer, groove side surface upper part point is prepared containing thin
Water-based material layer, lower pixel defining layer of the part containing hydrophilic materials.
Above-mentioned steps are described in detail below by specific embodiment.
In step 100, the original pixel defining layer can be prepared by following steps: on the substrate got ready
One layer of pixel defining layer is prepared using the method poured, with a thickness of 3-5 μm, as shown in Figure 1,1 is original pixel defining layer.
The pixel defining layer is prepared as the prior art, and more specifically details are not described herein for preparation process.
Further, it before preparing the original pixel defining layer over the substrate, further comprises the steps of: to the lining
Bottom starts the cleaning processing, specific cleaning process: cleaning solution is sprayed in substrate surface, after hairbrush is scrubbed, into high pressure
It sprays in ultrapure water, rinses substrate surface, remove the raffinate of substrate surface, finally dried up.
In step 200, the mold has boss, and the boss and the groove of the pixel defining layer coincide.
In step 300, the boss level is divided into upper and bottom section, and the outer diameter of the upper part is greater than lower part
Outer diameter, forms one layer of hydrophobic material in the side of the upper part, forms one layer of hydrophily material in the side of the lower part
Material.Mold of the present invention plays the role of seal in similar transfer, by the way that hydrophobic material and hydrophilic material to be coated in
Then the side of mold convexity is transferred to pixel defining layer groove side by mold, part is hydrophobic in acquisition, lower part is hydrophilic
Pixel defining layer structure.
As one of specific embodiment, the boss level is divided into upper and bottom section, the upper part
Outer diameter is greater than the outer diameter of lower part, one layer of hydrophobic material is formed in the side of the upper part, in the side of the lower part
The method for forming one layer of hydrophilic material, comprising steps of
It secures the mold in positioning device, the mold can move up and down, and precision controlling is at 0.01 μm；
The boss is fully immersed in configured good hydrophobic material solution, immersion depth is denoted as h1,1-3min is stood,
One layer of hydrophobic material is formed in the boss side surfaces.Wherein it is molten by hydrophobic material to be dissolved in first for the hydrophobic material solution
It is configured in agent；The hydrophobic material is flexible polymer, such as can be fluorine-containing polyolefin, fluorine-containing polyalkylene oxide
One of hydrocarbon and polysiloxanes etc. are a variety of；First solvent can be in dimethylformamide and dimethyl sulfoxide etc.
It is one or more.Preferably, first solvent volume accounts for the 40%-70% of the hydrophobic material liquor capacity.
The boss is immersed in cleaning solution after taking-up, immersion depth is denoted as h2.The present invention is molten using the cleaning
Liquid is to clean partially formed under boss one layer of hydrophobic material, and the cleaning solution can be (hydrophobic for hydrophobic solvent
Class solvent can be hydrocarbon solvent, such as toluene, dimethylbenzene.) or clear water solution etc. it is without being limited thereto.
The boss is immersed in configured good hydrophilic material solution after taking-up, immersion depth is denoted as h3, wherein
H1 > h3>=h2>0, h1>boss height, and h3<boss height stand 1-3min, form one layer in the side of the upper part
Hydrophobic material forms one layer of hydrophilic material in the side of the lower part.Wherein the hydrophilic material solution is by hydrophilic
Property material, which is dissolved in the second solvent, to be configured；The hydrophilic material is rigid polymer, and the rigid polymer is main chain
In one of polymer containing annular rigid structure etc. or a variety of in polymer and main chain containing alkyl, such as can be
Polyimides, bisphenol-a polycarbonate；Second solvent can for one of dichlorotoleune, benzotrichloride and acetone etc. or
It is a variety of.Preferably, second solvent volume accounts for the 30%-70% of the hydrophilic material liquor capacity.
In step 400, as a wherein specific embodiment, by the boss of the mold and the pixel defining layer
Groove fitting, and under the conditions ofs heating, ultrasonic vibration or ultraviolet irradiation etc., groove side surface upper part point material containing hydrophobicity is prepared
The bed of material, lower pixel defining layer of the part containing hydrophilic materials.Preferably, the temperature of the heating is 100-150 DEG C, heating
Time is 5-10min.Mold of the present invention plays the role of seal in similar transfer, by by hydrophobic material and hydrophily
Material be coated in mold convexity side, pixel defining layer groove side is then transferred to by mold, in acquisition part it is hydrophobic,
The hydrophilic pixel defining layer structure in lower part, so as to improve the uniformity of ink-jet printing ink.
The present invention provides a kind of pixel defining layer, wherein using the preparation method system of pixel defining layer of the present invention
It is standby to form.As shown in Fig. 2, pixel defining layer of the present invention includes original pixel defining layer 1, wherein further include pixel circle
The hydrophobic material layer 2 that the side surface upper part of the groove of given layer point is formed, the hydrophilic materials 3 that lower part is formed.
Present invention pixel defines the structure that part on layer is hydrophobic, lower part is hydrophilic, and this structure changes pixel defining layer
Wetting characteristics, in groove (pixel region) depositing light-emitting unit (including the hole functional layer, luminescent layer defined to pixel defining layer
With electronic work ergosphere) material when, the hydrophobic solution that can be avoided in upper part flows to adjacent pixel region, and lower part is hydrophilic to improve
The surface tension of solution enables solution to be entirely paved in the pixel region that pixel defining layer defines, and improves film forming homogeneity, from
And improve device luminous mass, prolong the service life.
Pixel defining layer of the present invention with a thickness of 3-5 μm, wherein the groove side hydrophobicity of the pixel defining layer
Material covering with a thickness of 1.5-2.5 μm.In each layer structure of depositing light-emitting unit, the solution of every layer of structure can be dredged in upside
Under the action of water, downside are hydrophilic, uniform film is formed.
The present invention also provides a kind of applications of pixel defining layer as described above, wherein is used for the pixel defining layer
Prepare electroluminescent device.
Pixel defining layer is prepared using the above method in the present invention, and QLED device is then prepared by way of inkjet printing
Part.As a wherein preferred embodiment, in the pixel defining layer groove, hole is sequentially depositing using the method for inkjet printing
Implanted layer (HIL), hole transmission layer (HTL), quantum dot light emitting layer (QD), electron transfer layer (ETL) and back electrode.The present invention
The pixel defining layer being prepared, since the groove side surface upper part of pixel defining layer is divided with hydrophobicity, lower part with hydrophilic
Property, when preparing QLED device using inkjet printing methods, ink uniformity can be improved, keep prepared device performance more steady
It is fixed, and simple process.
Below by embodiment, the present invention is described in detail.
Embodiment 1
The preparation step of the present embodiment pixel defining layer is as follows:
1, the method poured is used to deposit upper a layer thickness as 5 μm of pixel defining layer material (positivity light on ito glass substrate
Photoresist)；
2, as shown in Fig. 34, mold is then mounted on positioning device (can move up and down, precision is controllably 0.01 mold shape
μm), mold decline is immersed in polysiloxanes and dimethyl formamide solution (hydrophobic material solution) for 5 μm, wherein diformazan
It is 40% that base formamide volume, which accounts for total volume, stands 1min and takes out, and 3 μm of decline, which is put into clear water, to be cleaned up, and then takes out decline
3 μm are immersed in polyimides and dichlorotoleune solution (hydrophilic material solution), and wherein dichlorotoleune volume accounts for total volume and is
30%, it stands 1min and takes out, surface forms one layer of hydrophobic material on the boss of mold, and lower surface forms one layer
Hydrophilic material, as shown in Figure 3,5 be hydrophobic material in Fig. 3, and 6 be hydrophilic material；
3, the boss for being coated with the mold of hydrophobe material is bonded with the groove of the pixel defining layer poured before, at 100 DEG C
Lower heating 5min takes out mold, to obtain the upper pixel defining layer that part is hydrophobic, lower part is hydrophilic.
The preparation step of the present embodiment QLED device is as follows:
Upper hole injection layer (HIL), hole are successively deposited using inkjet printing technology in the above-mentioned pixel defining layer prepared
Transport layer (HTL), quantum dot light emitting layer (QD), electron transfer layer (ETL) and back electrode.
Embodiment 2
The preparation step of the present embodiment pixel defining layer is as follows:
1, the method poured is used to deposit upper a layer thickness as 5 μm of pixel defining layer material (positivity light on ito glass substrate
Photoresist)；
2, as shown in Fig. 34, mold is then mounted on positioning device (can move up and down, precision is controllably 0.01 mold shape
μm), mold decline is immersed in polysiloxanes and dimethyl formamide solution (hydrophobic material solution) for 5 μm, wherein diformazan
It is 50% that base formamide volume, which accounts for total volume, stands 1min and takes out, and 3 μm of decline, which is put into clear water, to be cleaned up, and then takes out decline
3 μm are immersed in polyimides and dichlorotoleune solution (hydrophilic material solution), and wherein dichlorotoleune volume accounts for total volume and is
50%, it stands 1min and takes out, surface forms one layer of hydrophobic material on the boss of mold, and lower surface forms one layer
Hydrophilic material, as shown in Figure 3,5 be hydrophobic material in Fig. 3, and 6 be hydrophilic material；
3, the boss for being coated with the mold of hydrophobe material is bonded with the groove of the pixel defining layer poured before, at 100 DEG C
Lower heating 5min takes out mold, to obtain the upper pixel defining layer that part is hydrophobic, lower part is hydrophilic.
The preparation step of the present embodiment QLED device is as follows:
Upper hole injection layer (HIL), hole are successively deposited using inkjet printing technology in the above-mentioned pixel defining layer prepared
Transport layer (HTL), quantum dot light emitting layer (QD), electron transfer layer (ETL) and back electrode.
Embodiment 3
The preparation step of the present embodiment pixel defining layer is as follows:
1, the method poured is used to deposit upper a layer thickness as 5 μm of pixel defining layer material (positivity light on ito glass substrate
Photoresist)；
2, as shown in Fig. 34, mold is then mounted on positioning device (can move up and down, precision is controllably 0.01 mold shape
μm), mold decline is immersed in polysiloxanes and dimethyl formamide solution (hydrophobic material solution) for 5 μm, wherein diformazan
It is 70% that base formamide volume, which accounts for total volume, stands 2min and takes out, and 3 μm of decline, which is put into clear water, to be cleaned up, and then takes out decline
3 μm are immersed in polyimides and dichlorotoleune solution (hydrophilic material solution), and wherein dichlorotoleune volume accounts for total volume and is
70%, it stands 3min and takes out, surface forms one layer of hydrophobic material on the boss of mold, and lower surface forms one layer
Hydrophilic material, as shown in Figure 3,5 be hydrophobic material in Fig. 3, and 6 be hydrophilic material；
3, the boss for being coated with the mold of hydrophobe material is bonded with the groove of the pixel defining layer poured before, at 100 DEG C
Lower heating 5min takes out mold, to obtain the upper pixel defining layer that part is hydrophobic, lower part is hydrophilic.
The preparation step of the present embodiment QLED device is as follows:
Upper hole injection layer (HIL), hole are successively deposited using inkjet printing technology in the above-mentioned pixel defining layer prepared
Transport layer (HTL), quantum dot light emitting layer (QD), electron transfer layer (ETL) and back electrode.
In conclusion a kind of pixel defining layer provided by the invention and preparation method, mold of the present invention play similar
Then the effect of seal in transfer passes through mould by the way that hydrophobic material and hydrophilic material to be coated in the side of mold convexity
Have and is transferred to pixel defining layer groove side, the pixel defining layer structure that part is hydrophobic, lower part is hydrophilic in acquisition, so as to improve
The uniformity of ink-jet printing ink.The pixel defining layer that upper part is hydrophobic, lower part is hydrophilic is prepared using the method for the present invention,
Then QLED device is prepared by way of inkjet printing, simple process, prepared device performance is more stable.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (11)
1. a kind of preparation method of pixel defining layer, which is characterized in that comprising steps of original pixel defining layer is provided, it is described
Pixel defining layer has the groove for defining luminescence unit；
The mold with boss is provided, the boss of the mold and the groove of the pixel defining layer coincide；
The boss level is divided into upper and bottom section, and the outer diameter of the upper part is greater than the outer diameter of lower part, on described
Partial side forms one layer of hydrophobic material, forms one layer of hydrophilic material in the side of the lower part；
The boss of the mold is bonded with the groove of the pixel defining layer, groove side surface upper part point is prepared containing hydrophobicity
Material layer, lower pixel defining layer of the part containing hydrophilic materials.
2. the preparation method of pixel defining layer according to claim 1, which is characterized in that the boss level is divided into top
Divide and lower part, the outer diameter of the upper part are greater than the outer diameter of lower part, forms one layer of hydrophobicity in the side of the upper part
Material, in the method that the side of the lower part forms one layer of hydrophilic material, comprising steps of
The boss is fully immersed in hydrophobic material solution, immersion depth is denoted as h1, forms one in the boss side surfaces
Layer hydrophobic material；
The boss is immersed in cleaning solution after taking-up, immersion depth is denoted as h2；
The boss is immersed in hydrophilic material solution after taking-up, immersion depth is denoted as h3, wherein h3 >=h2 > 0 h1 >,
H1>boss height, and h3<boss height form one layer of hydrophobic material in the side of the upper part, in the lower part
Side forms one layer of hydrophilic material.
3. the preparation method of pixel defining layer according to claim 2, which is characterized in that the hydrophobic material solution by
Hydrophobic material, which is dissolved in the first solvent, to be configured；
The hydrophobic material is flexible polymer；
And/or first solvent is one of dimethylformamide and dimethyl sulfoxide or a variety of.
4. the preparation method of pixel defining layer according to claim 3, which is characterized in that the flexible polymer is fluorine-containing
One of polyolefin, fluorine-containing polyalkylene oxide and polysiloxanes or a variety of.
5. the preparation method of pixel defining layer according to claim 2, which is characterized in that the hydrophilic material solution by
Hydrophilic material, which is dissolved in the second solvent, to be configured；
The hydrophilic material is rigid polymer；
And/or second solvent is one of dichlorotoleune, benzotrichloride and acetone or a variety of.
6. the preparation method of pixel defining layer according to claim 5, which is characterized in that the rigid polymer is main chain
In one of polymer containing annular rigid structure or a variety of in polymer and main chain containing alkyl.
7. the preparation method of pixel defining layer according to claim 6, which is characterized in that the rigid polymer is polyamides
Imines or bisphenol-a polycarbonate.
8. the preparation method of pixel defining layer according to claim 1, which is characterized in that the boss by the mold
It is bonded with the groove of the pixel defining layer, groove side surface upper part point layer containing hydrophobic material is prepared, lower part is containing hydrophilic
The step of pixel defining layer of property material layer include: the boss of the mold is bonded with the groove of the pixel defining layer, and
Under the conditions of heating, ultrasonic vibration or ultraviolet irradiation, make the hydrophobic material and hydrophilic material transfer in the boss side surfaces
On to the groove side, groove side surface upper part point layer containing hydrophobic material, lower pixel of the part containing hydrophilic materials are obtained
Define layer.
9. the preparation method of pixel defining layer according to claim 1, which is characterized in that the thickness of the pixel defining layer
It is 3-5 μm.
10. the preparation method of pixel defining layer according to claim 9, which is characterized in that the pixel defining layer it is recessed
Slot side hydrophobic material covering with a thickness of 1.5-2.5 μm.
11. a kind of pixel defining layer, which is characterized in that using the system such as the described in any item pixel defining layers of claim 1-10
Preparation Method is prepared.
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