CN107464832B - Organic light-emitting display panel, preparation method thereof and organic light-emitting display device - Google Patents
Organic light-emitting display panel, preparation method thereof and organic light-emitting display device Download PDFInfo
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- CN107464832B CN107464832B CN201710647121.9A CN201710647121A CN107464832B CN 107464832 B CN107464832 B CN 107464832B CN 201710647121 A CN201710647121 A CN 201710647121A CN 107464832 B CN107464832 B CN 107464832B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000758 substrate Substances 0.000 claims abstract description 64
- 230000004888 barrier function Effects 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 27
- 238000005516 engineering process Methods 0.000 claims description 15
- 238000009499 grossing Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000005530 etching Methods 0.000 claims description 8
- 238000007641 inkjet printing Methods 0.000 claims description 8
- 239000007772 electrode material Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 5
- 239000012774 insulation material Substances 0.000 claims description 4
- 239000011368 organic material Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 229910010272 inorganic material Inorganic materials 0.000 claims 1
- 239000011147 inorganic material Substances 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 229920002120 photoresistant polymer Polymers 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 229910004205 SiNX Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000010453 quartz Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 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
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
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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
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Abstract
The application discloses organic light emitting display panel and preparation method, organic light emitting display device, this organic light emitting display panel includes: the pixel blocking retaining wall divides the organic light-emitting display panel into a plurality of pixel units; the first substrate comprises a substrate and a planarization layer, wherein the planarization layer is provided with a plurality of grooves; the first electrode is formed on the planarization layer, a groove is formed between the adjacent first electrodes in the same pixel unit, and the first electrode covers part of the surface of the groove; the insulating layer covers the part of the first electrode, which covers the groove, and the part of the groove, which is not covered by the first electrode, wherein the surface of the insulating layer is not higher than the surface of the first electrode, which is not covered by the insulating layer; an organic light emitting layer provided in each pixel unit, covering a portion of the first electrode not covered by the insulating layer and the insulating layer; a second electrode. Therefore, the thickness uniformity of the organic light emitting layer in contact with the first electrode can be ensured, and the display quality of the organic light emitting display panel is improved.
Description
Technical field
Present application relates generally to field of display technology more particularly to organic light emitting display technical fields, and in particular to organic
Light emitting display panel and preparation method, the organic light-emitting display device including the organic light emitting display panel.
Background technique
With the development of electronic technology, electronic product has spread people's lives.Display technology be in electronic technology extremely
An important technology is closed, the display effect of electronic product is related to.In field of display technology, display device is divided into two classes: having
Machine luminous display unit and liquid crystal display device.Existing organic light-emitting display device, which generallys use, increases pixel density to meet
Meet the high definition demand of user.
In general, the prior art can increase the density of pixel by forming multiple pixels in a pixel unit, together
Adjacent electrode needs in one pixel unit are electrically insulated by the insulating layer between adjacent electrode, and are located at phase
Insulating layer between adjacent electrode is often or higher than electrode.When forming organic luminous layer on the electrode using inkjet printing technology,
Insulating layer between adjacent electrode will lead to the ink droplet higher than electrode and be difficult to uniformly spread.The corresponding organic hair of Different electrodes
The thickness of photosphere is different, the display quality of the lower organic light emitting display panel of meeting.
Summary of the invention
In view of drawbacks described above in the prior art, the embodiment of the present application provides a kind of organic light emitting display panel and its preparation
Method and organic light-emitting display device including the organic light emitting display panel are mentioned solving background section above
Technical problem.
To achieve the goals above, in a first aspect, the embodiment of the present application provides a kind of organic light emitting display panel, this has
Machine light emitting display panel includes: first substrate, and the pixel barriers barricade of setting on the first substrate, and pixel barriers barricade will
Organic light emitting display panel is separated out multiple pixel units；First substrate, comprising: substrate, and setting is on a surface of the substrate
Planarization layer, planarization layer is provided with multiple grooves；Multiple first electrodes in each pixel unit, each first electrode are set
It is formed on planarization layer, and there are grooves between the adjacent first electrode in same pixel unit, and first electrode covers
The part of the surface of groove；Insulating layer in groove is set, and insulating layer covers the part that groove is covered in first electrode, and insulate
The part not covered by first electrode in layer covering groove, wherein the surface of insulating layer, which is not higher than in first electrode, is not insulated
The surface of layer covering；Organic luminous layer in each pixel unit is set, is not insulated in organic luminous layer covering first electrode
The part of layer covering and insulating layer；Second electrode, second electrode cover organic luminous layer and pixel barriers barricade.
Second aspect includes that above-mentioned organic light emission is aobvious the embodiment of the present application also provides a kind of organic light-emitting display device
Show panel.
The third aspect, the embodiment of the present application also provides a kind of preparation methods of organic light emitting display panel, comprising: preparation
First substrate, wherein first substrate includes multiple pixel unit areas and the pixel barriers barricade area positioned at adjacent pixel unit area；
Preparing first substrate includes: that covering smoothing material layer, etching smoothing material layer form planarization layer on substrate, wherein
Planarization layer includes multiple grooves；First electrode material layer is covered in planarization layer, etching is located at the bottom surface of each groove at least
Part first electrode material, forms multiple first electrodes, wherein each pixel unit area includes at least two first electrodes, same
There are grooves between two adjacent first electrodes in one pixel unit area；The covering insulating material layer in each first electrode is carved
Insulation material layer is lost, exposes the first electrode outside groove, and expose the planarization layer in pixel barriers barricade area, is formed
Insulating layer, wherein the surface of insulating layer is not higher by the surface of the first electrode exposed；It is formed and is used in pixel barriers barricade area
The pixel barriers barricade of partitioning pixel unit；Organic luminous layer is formed in each pixel unit using inkjet printing technology；Having
Machine luminescent layer and pixel barriers barricade cover second electrode.
Pixel barriers gear on the first substrate can be set in organic light emitting display panel provided by the embodiments of the present application
Wall is separated into multiple pixel units, and first substrate may include the planarization layer of substrate and setting on substrate, the planarization layer
Equipped with multiple grooves, each pixel unit may include the first electrode being formed on planarization layer, and in same pixel unit
There are above-mentioned groove among adjacent first electrode, also, each first electrode covers the portion inner surface of the first groove, in groove
Insulating layer is set, which, which can cover, covers groove in the part not covered by first electrode in groove and first electrode
Part, and the surface of the insulating layer, not higher than the surface not covered by insulating layer in first electrode, organic luminous layer setting exists
In each pixel unit, and the part not covered by insulating layer in the first electrode in the pixel unit and insulating layer are covered, second
Electrode covers organic luminous layer and pixel barriers barricade, and wherein the surface of insulating layer is not higher than in first electrode and is not covered by insulating layer
The surface of lid can make the thickness for the organic luminous layer being located in different first electrodes in pixel unit more uniform, improve organic
The display quality of light emitting display panel.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Figure 1A shows the structural schematic diagram of the organic light emitting display panel according to the application；
Figure 1B shows the structural schematic diagram of the first substrate in Figure 1A in organic light emitting display panel；
Fig. 2 shows the flow charts according to one embodiment of the preparation method of the organic light emitting display panel of the application；
Fig. 3 shows first made during first substrate using the preparation method of the application organic light emitting display panel
Cross section structure schematic diagram；
Fig. 4 shows second made during first substrate using the preparation method of the application organic light emitting display panel
Cross section structure schematic diagram；
Fig. 5 shows the third made during first substrate using the preparation method of the application organic light emitting display panel
Cross section structure schematic diagram；
Fig. 6 shows the 4th made during first substrate using the preparation method of the application organic light emitting display panel
Cross section structure schematic diagram；
Fig. 7 shows the 5th made during first substrate using the preparation method of the application organic light emitting display panel
Cross section structure schematic diagram；
Fig. 8 shows the structural schematic diagram of one embodiment of the organic light-emitting display device according to the application.
Specific embodiment
The principle of the application and feature are described in further detail with reference to the accompanying drawings and examples.It is understood that
It is that specific embodiment described herein is used only for explaining related invention, rather than the restriction to the invention.It further needs exist for
It is bright, part relevant to invention is illustrated only for ease of description, in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Please refer to Figure 1A-Figure 1B, wherein Figure 1A shows the structural representation of the organic light emitting display panel according to the application
Figure, Figure 1B show the structural schematic diagram of the first substrate in Figure 1A in organic light emitting display panel.As shown in Figure 1A, this implementation
The organic light emitting display panel 100 of example may include first substrate, and the multiple pixel barriers being arranged on first substrate 110
Organic light emitting display panel 100 can be separated out multiple pixel units 130 by barricade 120, above-mentioned each pixel barriers barricade 120.
As shown in Figure 1B, the first substrate 110 in the present embodiment may include substrate 101, planarization layer 102, first electrode 103, absolutely
Edge layer 104, organic luminous layer 105 and second electrode 106.
In the present embodiment, above-mentioned planarization layer 102 can be set in a side surface of substrate 101, and the planarization
Multiple groove CH1 can be equipped on layer 102, as shown in Figure 1B, and there are at least one grooves in each pixel unit 130
CH1.Above-mentioned first substrate 110 can also include multiple first electrodes 103, and can be set in each pixel unit 130
Two or more first electrodes 103.For example, each pixel unit 130 can in the first substrate 110 shown in Figure 1B
Two first electrodes 103 are arranged.Each first electrode 103 can be formed on planarization layer 102, and in same pixel unit
In 130, there are groove CH1 between adjacent first electrode 103, and as shown in Figure 1B, the first electrode 103 of the two sides groove CH1 can
To extend in groove CH1 and be covered on the portion inner surface of groove CH1.
In the present embodiment, above-mentioned first substrate 110 can also include insulating layer 104, which can be located at recessed
In slot CH1, as shown in Figure 1B.Above-mentioned first substrate 110 can also include organic luminous layer 105, as shown in Figure 1B, organic hair
Photosphere 105 can be located in first electrode 103.Specifically, above-mentioned insulating layer 104 can cover prolongs in above-mentioned first electrode 103
The part of groove CH1 is extended to, and the insulating layer 104 can also cover the part table not covered by first electrode 103 in groove CH1
Face, as shown in Figure 1B.In addition, first electrode 103 is just neat with the edge of groove CH1 in another optional embodiment
Flat, insulating layer 104 is just filled in the surface groove CH1 and edge is in contact with first electrode 103.Above-mentioned insulating layer 104 can be with
It avoids the first electrode 103 of the two sides groove CH1 where being located at it from being electrically connected, and the insulating layer 104 is arranged in groove CH1
It is interior, while the first electrode 103 positioned at the two sides groove CH1 can be made to be electrically insulated, avoid the surface of the insulating layer 104 high
In the surface of first electrode 103.It is understood that if the not set groove CH1 of planarization layer 102, at this time for so that same
The insulating layer 104 that each first electrode 103 in pixel unit 130 is electrically insulated can be arranged directly on planarization layer 102, should
The surface of insulating layer 104 will appear the case where surface higher than first electrode 103.And the surface of insulating layer 104 is higher than not by it
The surface of the first electrode 103 covered can result in organic hair in the pixel unit 130 where the insulating layer 104
The uneven thickness one of photosphere 104, it can so that organic in different first electrodes 103 in same pixel unit 130
The thickness of luminescent layer 105 is different, and the thickness of organic luminous layer 105 can influence shining for pixel, so that it is aobvious to influence organic light emission
Show the display effect of panel 100.In the present embodiment, the surface of insulating layer 104 is not higher than in first electrode 103 not by the insulation
The surface of 104 covering of layer, when such structure can make inkjet printing organic luminous layer, the ink including luminescent material can fill
Shunt it is dynamic so that the thickness for the organic luminous layer 105 being located in pixel unit 130 in each first electrode 103 after processing procedure compared with
It is uniform, it thereby may be ensured that the display quality of organic light emitting display panel.
In the present embodiment, organic luminous layer 105, and the organic luminous layer 105 can be equipped in each pixel unit 130
The part not covered by insulating layer 104 in first electrode 103 can be not only covered, the insulating layer 104 can also be covered, such as Figure 1B
It is shown.Above-mentioned first substrate 110 can also include second electrode 106, and second electrode 106 can be covered positioned at each pixel list
Organic luminous layer 105 in member 130, and the pixel barriers barricade 120 between each pixel unit 130, as shown in Figure 1B.
It is understood that above-mentioned first electrode 103 and second electrode 106 can be respectively organic light emitting display panel
Anode and cathode in 100.Under external voltage driving, hole and electronics can inject organic light emission from anode and cathode respectively
Layer 105, hole and electronics is compound in organic luminous layer 105 gives off energy, to generate luminescence phenomenon.Work as first electrode
When the thickness difference of the organic luminous layer 105 between 103 and second electrode 106, the light intensity that organic luminous layer 105 generates is different,
To influence the display quality of organic light emitting display panel 100.And the present embodiment by planarization layer 102 be arranged groove CH1,
The insulating layer 104 that adjacent first electrode 103 is electrically insulated will be controlled to be arranged in groove CH1, so as to avoid insulating layer 104
Surface be higher than first electrode 103 surface, avoid the organic luminous layer 105 that the surface of different first electrodes 103 is set
Difference in thickness is larger, improves the display quality of organic light emitting display panel 100.
In some optional implementations of this implementation, the surface of above-mentioned insulating layer 104 is lower than in first electrode 103 not
The surface covered by the insulating layer 104, at this point, being not only located at 103 organic light emission of the first pixel electrode in pixel unit 130
The thickness of layer 105 is identical.
In other optional implementations of this implementation, in the surface of above-mentioned insulating layer 104 and first electrode 103 not
The surface covered by the insulating layer 104 can be in the same plane.At this point, being not only located at the first pixel in pixel unit 130
The thickness of 103 organic luminous layer 105 of electrode can be identical, the organic light emission on the insulating layer 104 in the pixel unit 130
The thickness of layer 105 and the organic luminous layer 105 being located in first electrode 103 are also identical, organic so as to further improve
The display quality of light emitting display panel 100.
In some optional implementations of the present embodiment, above-mentioned organic light emitting display panel 100 can also include picture
Plain circuit (not shown), and the pixel circuit can be set between planarization layer 102 and substrate 101, and which can
For providing voltage signal for each first electrode 103.It can be equipped on above-mentioned planarization layer 102 multiple through the planarization layer
102 layers of through-hole CH2, there are at least one through-hole CH2 to be corresponding to it for each first electrode 103, so that each first electrode
It can be electrically connected by through-hole CH2 with corresponding pixel circuit.
In some optional implementations of the present embodiment, the depth of above-mentioned groove CH1 and the thickness of planarization layer 102
Compared to smaller, therefore the edge for being located at the first electrode 103 of the two sides groove CH1 extends to the inner surface of groove CH1.Into one
Step ground, the side of groove CH1 can be at least completely covered in the edge of two first electrodes 103 adjacent with groove CH1.It is above-mentioned
Width a of the bottom surface of groove CH1 along first direction, and the first adjacent with groove CH1 in a first direction pixel electrode 103
The distance between b, can satisfy a >=b, then the edge of two first electrodes 103 adjacent with groove CH1 can be made at least complete
The side of all standing groove CH1, first direction here can be parallel with the surface of substrate 101, as shown in Figure 1B.
In some optional implementations of the present embodiment, the bottom surface of the side and groove CH1 of above-mentioned groove CH1
Angle can be α, and the angle α can satisfy 120 ° of α >, which can make the surface of planarization layer 102 to groove CH1
Side transition region it is more gentle, so as to avoid first electrode 103 because leading to the first electrode 103 the transition region is relatively thin
In transition region easy fracture, the display effect of touch-control display panel 100 ensure that.Above-mentioned groove CH1 is for being arranged so that adjacent the
The insulating layer 104 that one electrode 103 is electrically insulated, therefore groove CH1 is not needed through planarization layer 102, and groove CH1 is only
The depth of needs need to be met.The depth c of above-mentioned groove CH1 in a second direction meets 100nm≤c≤300nm, can make
First electrode 103 can extend in groove CH1, and the insulating layer 104 that groove CH1 is arranged in can make adjacent
One electrode 103 is electrically insulated.
Multiple grooves are arranged in planarization layer 102 in the organic light emitting display panel provided by the above embodiment 100 of the application
CH1, there are groove CH1 between adjacent first electrode 103 in same pixel unit 130, and each first electrode 103 can be covered
The part of the surface of lid groove CH1, insulating layer 104 is arranged in groove CH1, so that adjacent first electrode 103 is electrically insulated, and
And the surface that can be higher than first electrode 103 to avoid the surface of insulating layer 104 is arranged in groove CH1 in insulating layer 104, so as to
Difference in thickness to avoid the organic luminous layer 105 on the surface that different first electrodes 103 are arranged in is larger, and it is aobvious to improve organic light emission
Show the display quality of panel 100.
Referring next to Fig. 2, it illustrates the streams according to the preparation method of the organic light emitting display panel of the present embodiment
The figure of journey.Organic hair as shown in Figure 1A can be prepared using the preparation method 200 of the organic light emitting display panel of the present embodiment
Light display panel.Fig. 3-Fig. 7, which is shown, makes first substrate process using the preparation method of the application organic light emitting display panel
In cross section structure schematic diagram.Specifically, the preparation method 200 of the organic light emitting display panel of the present embodiment can be used for preparing
First substrate, the first substrate can with specific structure can be as shown in Figure 1B, which may include multiple pixel lists
First area and pixel barriers barricade area positioned at adjacent pixel unit area, the method for preparing first substrate can specifically include following step
It is rapid:
Step 201, smoothing material layer is covered on substrate, etches smoothing material layer, forms planarization layer.
In the present embodiment, the substrate 101 for being used to prepare first substrate can be set first, as shown in figure 3, the substrate
101 can be made of glass substrate, quartz substrate or organic material etc..It can be covered later in a side surface of the substrate 101
Smoothing material layer then etches the smoothing material layer and forms planarization layer 102.It should be noted that the planarization layer 102
It could be formed with multiple groove CH1, as shown in Figure 3.
It, can be in substrate 101 before covering smoothing material layer in some optional implementations of the present embodiment
Upper formation pixel circuit, the pixel electrode can provide letter voltage signal for the first electrode in organic light emitting display panel.Into
One step, it can use intermediate tone mask plate and development be exposed to above-mentioned smoothing material layer, then etch above-mentioned groove
CH1, while through-hole CH2 is etched, through-hole CH2 can be corresponding with above-mentioned pixel circuit.In order to the first electrode of formation
It can be electrically connected by through-hole CH2 with pixel circuit.
Optionally, the angle of the side of above-mentioned groove CH1 and the bottom surface of groove CH1 is α, and the angle can satisfy α
120 ° of >, and the depth of groove CH1 in a second direction is c, and c can satisfy 100nm≤c≤300nm, wherein second party
To can be vertical with substrate 101.
It should be noted that the forming process of the planarization layer 102 in above-mentioned first substrate may include smoothing material
The a series of processes such as film forming, coating photoresist, exposure, development, etching, the stripping photoresist of layer.Because by coating photoresist,
The techniques such as stripping photoresist are the conventional means of this field, therefore the application is when describing first substrate manufacturing process, not to upper
The process of stating is specifically described.It will be understood by those skilled in the art that not describing correlated process is not intended to each embodiment not
In the presence of or omit correlation step.
Step 202, first electrode material layer is covered in planarization layer, etching is located at least partly the of the bottom surface of each groove
One electrode material forms multiple first electrodes.
In the present embodiment, the planarization layer 102 formed based on step 201, can continue to cover on the planarization layer 102
One layer of first electrode material layer of lid, and etch at least partly first electricity of the bottom surface groove CH1 being located in each pixel unit
Pole material layer, to form the multiple first electrodes 103 being located in each pixel unit, as shown in Figure 4.It should be noted that having
It could be formed with multiple first electrodes 103 in each pixel unit in machine light emitting display panel, as shown in figure 4, and same
May exist groove CH1 in pixel unit between adjacent first electrode 103.
Optionally, the bottom surface of above-mentioned groove CH1 can be a along the width of first direction, as shown in Figure 4.Also, first
On direction, the distance between first electrode 103 adjacent with groove CH1 can be b, and above-mentioned width a and distance b can satisfy
A >=b, so that being located at the side that groove CH1 can be at least completely covered in the edge of the first electrode 103 of the two sides groove CH1.
Step 203, covering insulating material layer, etching insulating material layer are exposed positioned at groove in each institute's first electrode
Outer first electrode, and the planarization layer in pixel barriers barricade area is exposed, form insulating layer.
In the present embodiment, the first electrode 103 formed based on step 202, can continue to cover in each first electrode 103
Lid insulation material layer, and using exposure developments such as mask plates, the insulation material layer is etched, the first electricity outside groove CH1 is exposed
Pole 103, and the planarization layer positioned at pixel barriers barricade area is exposed, form insulating layer 104 as shown in Figure 5.It needs to illustrate
, in etching insulating layer 104, it is required that the surface of the insulating layer 104 etched is not higher than the first electrode exposed
103 surface, as shown in Figure 5.
Optionally, the surface not covered by insulating layer 104 in the surface of above-mentioned insulating layer 104 and first electrode 103 is same
In one plane.
Step 204, the pixel barriers barricade for partitioning pixel unit is formed in pixel barriers barricade area.
In the present embodiment, the insulating layer 104 generated based on step 203 can continuously form setting on the first substrate
Pixel barriers barricade 120, and guarantee each pixel barriers barricade 120 can be located at pixel barriers barricade area, as shown in Figure 6.
Step 205, organic luminous layer is formed in each pixel unit using inkjet printing technology.
In the present embodiment, each pixel unit that can be formed using the technology of inkjet printing in pixel barriers barricade 120
Interior formation organic luminous layer 105, as shown in Figure 7.The organic luminous layer 105 can be covered on each first in each pixel unit
On electrode 103, and organic luminous layer can also be covered on insulating layer 104.Also, due to forming groove on planarization layer 102
CH1, for so that the insulating layer 104 that adjacent first electrode 103 is electrically insulated can be set in groove CH1, the insulating layer 104
Surface can be not higher than the surface for the first electrode 103 not covered by the insulating layer 104 in first electrode 103, therefore in benefit
When forming organic luminous layer 105 with inkjet printing technology, ink droplet can be made uniformly to divide on the surface of different first electrodes 103
It dissipates, so that the thickness for the organic luminous layer 105 being located in each first electrode 103 is more uniform, improves the organic hair prepared
The display effect of light display panel.
Optionally, when the surface not covered by the insulating layer 104 in the surface of above-mentioned insulating layer 104 and first electrode 103
When in the same plane, the surface smoothness of organic luminous layer 105 to be formed is high, so that being located at same pixel unit
The thickness of interior organic luminous layer 105 is uniform, further increases the display effect for the organic light emitting display panel prepared.
Optionally, the material for forming above-mentioned insulating layer 104 is water wetted material.Organic hair is being formed using inkjet printing technology
When photosphere 105, insulating layer 104 is that water wetted material can make the ink droplet ejected diffusion more uniformly, the organic light emission of formation
105 thickness of layer are also more uniform.Further, above-mentioned water wetted material can be hydrophilic electrodeless machine material, for example, hydrophilic electrodeless material
Material can be SiNx、SiO2、Al2O3At least one of.Above-mentioned water wetted material can also be hydrophilic organic materials.Here, for
The water wetted material for forming insulating layer 104 does not limit uniquely.
Step 206, second electrode is covered in organic luminous layer and pixel barriers barricade.
In the present embodiment, second electrode 106 is covered on the organic luminous layer 105 formed based on step 205, is formed as schemed
First substrate structure shown in 1B.Above-mentioned second electrode 106, which is not just coated with machine luminescent layer 105, can also cover pixel barriers gear
Wall 120, as shown in Figure 1B.It is understood that above-mentioned first electrode 103 and second electrode 106 can be respectively organic light emission
Anode and cathode in display panel 100.Under external voltage driving, hole and electronics are organic from anode and cathode injection respectively
Luminescent layer 105, hole and electronics are compound in having light emitting machine layer 105 to give off energy, to generate luminescence phenomenon.When the first electricity
When the thickness difference of the organic luminous layer 105 between pole 103 and second electrode 106, the light intensity that organic luminous layer 105 generates is not
Together, the display quality of organic light emitting display panel 100 is further influenced.And the present embodiment in planarization layer 102 by being arranged
Groove CH1 will control the insulating layer 104 that adjacent first electrode 103 is electrically insulated and be arranged in groove CH1, so as to avoid
The surface of insulating layer 104 is higher than the surface of first electrode 103, avoids organic hair that the surface of different first electrodes 103 is arranged in
The difference in thickness of photosphere 105 is larger, improves the display quality of organic light emitting display panel 100.
The preparation method of the organic light emitting display panel provided by the above embodiment of the application, can be first in planarization layer
Groove CH1 is set on 102, and there are groove CH1, first electrodes 103 between the adjacent first electrode 103 in each pixel unit
Edge extend in groove CH1, insulating layer 104 is formed in groove CH1 later, which can make phase
Adjacent first electrode 103 is electrically insulated, and the surface of the insulating layer 104 is not higher than the surface of first electrode 103, then utilizes spray
Black printing technique forms organic luminous layer 105 on the surface of first electrode 103, and the surface of insulating layer 104 is not higher than first
It the surface of electrode 103 can be in order to the ink droplet diffusion on it of ejection, so that the organic luminous layer 105 formed is in each first electricity
Thickness is more uniform on pole 103, eventually forms pixel barriers barricade 120 and second electrode 106, improves the organic light emission prepared
The display effect of display panel.
It is appreciated that the organic light emitting display panel in the application can also include thin film transistor (TFT), data line, scan line
Etc. known features, in order not to obscure the present embodiment nuclear structure, describe the present embodiment organic light emitting display panel when, slightly
The description to these known features is gone.
Finally, the embodiment of the present application provides a kind of organic light-emitting display device 800, to include organic in above-described embodiment
Light emitting display panel.Here, as shown in figure 8, Fig. 8 shows a kind of organic light-emitting display device provided by the embodiments of the present application
Schematic diagram.Organic light-emitting display device 800 can be mobile phone as shown in Figure 8.It is organic in the organic light-emitting display device 800
The specific structure and preparation method of light emitting display panel can be identical as organic light emitting display panel in above-described embodiment, here not
It repeats again.It will be appreciated by persons skilled in the art that above-mentioned organic light-emitting display device can also be to utilize organic light emission machine
Computer, TV, the wearable intelligent equipment etc. for managing preparation, will not enumerate here.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (10)
1. a kind of organic light emitting display panel characterized by comprising
First substrate, and setting pixel barriers barricade on the first substrate, the pixel barriers barricade is by organic hair
Light display panel is separated out multiple pixel units；
The first substrate, comprising:
Substrate, and the planarization layer being arranged on the surface of the substrate, the planarization layer are provided with multiple grooves；
Multiple first electrodes in each pixel unit are set, each first electrode is formed on the planarization layer,
And there are the grooves between the adjacent first electrode in same pixel unit, and first electrode covering is described recessed
The part of the surface of slot；
Insulating layer in the groove is set, the insulating layer covers the part that the groove is covered in the first electrode,
And the insulating layer covers the part not covered by the first electrode in the groove, wherein the surface of the insulating layer is not
Higher than the surface not covered by the insulating layer in the first electrode；
Organic luminous layer in each pixel unit is set, and the organic luminous layer covers in the first electrode not by institute
State the part and the insulating layer that insulating layer covers；
Second electrode, the second electrode cover the organic luminous layer and the pixel barriers barricade.
2. organic light emitting display panel according to claim 1, which is characterized in that the surface of the insulating layer and described the
The surface not covered by the insulating layer in one electrode is in the same plane.
3. organic light emitting display panel according to claim 1, which is characterized in that further include:
Pixel circuit over the substrate is formed, the planarization layer covers the pixel circuit；
The planarization layer is equipped with the through-hole corresponding with each first electrode, and the through-hole runs through the planarization layer；
The first electrode is electrically connected by the corresponding through-hole with the pixel circuit.
4. organic light emitting display panel according to claim 1, which is characterized in that the bottom surface of the groove is along first direction
Width be a, wherein the first direction is parallel with the surface of the substrate；
In said first direction, the distance between described first electrode adjacent with groove described in this is b, and a and b meet a
≥b。
5. organic light emitting display panel according to claim 4, which is characterized in that the side of the groove with it is recessed described in this
The angle of the bottom surface of slot is α, and meets 120 ° of α >；
The groove is c along the depth of the second direction, and meets 100nm≤c≤300nm, wherein the second direction with
The substrate transverse.
6. a kind of organic light-emitting display device, which is characterized in that including the organic light emitting display as described in one of claim 1-5
Panel.
7. a kind of preparation method of organic light emitting display panel characterized by comprising
Prepare first substrate, wherein the first substrate include multiple pixel unit areas and be located at the adjacent pixel unit area
Pixel barriers barricade area；
The first substrate for preparing includes:
Smoothing material layer is covered on substrate, etches the smoothing material layer, forms planarization layer, wherein described flat
Changing layer includes multiple grooves；
First electrode material layer is covered on the planarization layer, etching is located at least partly the first of the bottom surface of each groove
Electrode material forms multiple first electrodes, wherein each pixel unit area includes at least two first electrodes, in same institute
State between two first electrodes adjacent in pixel unit area that there are the grooves；
The covering insulating material layer in each first electrode, etches the insulation material layer, exposes outside the groove
First electrode, and expose the planarization layer in pixel barriers barricade area, form the insulating layer, wherein the insulation
The surface of layer is not higher by the surface of the first electrode exposed；
The pixel barriers barricade for separating the pixel unit is formed in pixel barriers barricade area；
Organic luminous layer is formed in each pixel unit using inkjet printing technology；
Second electrode is covered in the organic luminous layer and the pixel barriers barricade.
8. the method according to the description of claim 7 is characterized in that the organic light emitting display panel further include be formed in it is described
Pixel circuit on substrate；
The etching smoothing material layer, forms planarization layer, comprising:
Multiple grooves and multiple through-holes are etched in the smoothing material layer using intermediate tone mask plate, wherein each through-hole
Through smoothing material layer described in this, and the through-hole is corresponding with each first electrode, and each first electrode passes through correspondence
The through-hole be electrically connected with the pixel circuit.
9. the method according to the description of claim 7 is characterized in that the insulating materials for forming the insulating layer is water wetted material.
10. according to the method described in claim 9, it is characterized in that, the water wetted material includes hydrophilic organic materials and hydrophilic
Inorganic material.
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| CN109638049B (en) * | 2018-12-13 | 2021-06-01 | 武汉华星光电半导体显示技术有限公司 | Display panel |
| CN110164924B (en) * | 2019-04-25 | 2021-08-27 | 京东方科技集团股份有限公司 | Organic electroluminescent device and preparation method thereof |
| CN110600532B (en) * | 2019-11-13 | 2020-02-18 | 京东方科技集团股份有限公司 | Display panel and display device |
| WO2024113186A1 (en) * | 2022-11-29 | 2024-06-06 | 京东方科技集团股份有限公司 | Display substrate and preparation method therefor, and display device |
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