WO2016045268A1 - 电致发光器件及其制造方法、显示基板和显示装置 - Google Patents

电致发光器件及其制造方法、显示基板和显示装置 Download PDF

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Publication number
WO2016045268A1
WO2016045268A1 PCT/CN2015/070848 CN2015070848W WO2016045268A1 WO 2016045268 A1 WO2016045268 A1 WO 2016045268A1 CN 2015070848 W CN2015070848 W CN 2015070848W WO 2016045268 A1 WO2016045268 A1 WO 2016045268A1
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Prior art keywords
pixel
color
electroluminescent
pixel opening
layer
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PCT/CN2015/070848
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English (en)
French (fr)
Inventor
井口真介
廖金龙
高雪
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京东方科技集团股份有限公司
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Priority to US14/770,957 priority Critical patent/US9818802B2/en
Priority to EP15750914.2A priority patent/EP3200227B1/en
Publication of WO2016045268A1 publication Critical patent/WO2016045268A1/zh

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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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • 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
    • 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
    • H10K59/17—Passive-matrix OLED displays
    • H10K59/173—Passive-matrix OLED displays comprising banks or shadow masks
    • 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
    • H10K71/135—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing using ink-jet printing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
    • H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
    • 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
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/1201—Manufacture or treatment
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass

Definitions

  • the present invention relates to the field of display technologies, and in particular, to an electroluminescent device, a method of manufacturing the same, a display substrate, and a display device.
  • FIG. 1 is a cross-sectional view of a prior art electroluminescent device
  • FIG. 2 is a top view of FIG. 1
  • FIG. 3 is a schematic structural view of a pixel defining layer in the prior art, as shown in FIGS. 1 to 3, the electroluminescence
  • the device includes: a substrate 1 and a pixel defining layer 2 formed on the upper surface of the substrate 1.
  • the pixel defining layer 2 is surrounded by a pixel opening matrix corresponding to the pixel unit matrix, that is, one pixel unit 8 corresponds to one pixel opening 4
  • An electroluminescent layer 3 of a predetermined color is formed in the pixel opening 4.
  • a red electroluminescent layer 7 is formed in the pixel opening 4 corresponding to the red pixel unit
  • a green electroluminescent layer 6 is formed in the pixel opening 4 corresponding to the green pixel unit
  • a pixel opening 4 corresponding to the blue pixel unit is formed.
  • a blue electroluminescent layer 5 is formed.
  • the process of forming the electroluminescent layer by the inkjet method will be described in detail by taking the electroluminescent layer 7 in which the red color is formed in the pixel opening 4 corresponding to the red pixel unit as an example.
  • the red electroluminescent material solution is respectively instilled into the pixel openings of the corresponding positions by two (or more) nozzles in the inkjet device, and after the completion of the instillation process, the red electrolysis is performed by the drying device.
  • the luminescent material solution is dried to form a red electroluminescent layer 7.
  • the thickness of the light layer 7 is different, that is, the thickness of the red electroluminescent layer 7 in the electroluminescent device is inconsistent.
  • the present invention provides an electroluminescent device, a method of manufacturing the same, a display substrate, and a display device to solve the problem of inconsistent thickness of electroluminescent layers of the same color in the prior art.
  • the present invention provides an electroluminescent device comprising: a substrate and a pixel defining layer formed over the substrate, the pixel defining layer enclosing a pixel opening matrix, the pixel defining layer Forming at least one connection channel, each of the pixel openings in the pixel opening is formed with an electroluminescent layer of a predetermined color, the connection channel for connecting the same row or column in the pixel opening matrix And corresponding to at least two pixel openings of the electroluminescent layer of the same color.
  • connection channel is laterally disposed or longitudinally disposed, wherein the connection channel disposed laterally is used to connect all of the electroluminescent layers in the same row and corresponding to the same color in the pixel aperture matrix Pixel opening;
  • connection channel disposed longitudinally is used to connect all of the pixel openings of the electroluminescent layer in the same column and corresponding to the same color in the pixel aperture matrix.
  • connection channels on the pixel defining layer are laterally disposed;
  • connection channels on the pixel defining layer are longitudinally disposed.
  • connection channels when all the connection channels are laterally disposed, the row of the pixel openings corresponds to a laterally disposed connection channel, and the connection channel is located at a side of the corresponding row of the pixel openings;
  • connection channels When all of the connection channels are longitudinally disposed, a column of the pixel openings corresponds to a longitudinally disposed connection channel, and the connection channel is located on a side of the corresponding column of the pixel openings.
  • connection channels when all of the connection channels are laterally disposed, the pixels of one row are opened
  • the port corresponds to the two laterally disposed connecting channels, and the two laterally disposed connecting channels are respectively located on opposite sides of the pixel opening of the corresponding row;
  • connection channels When all of the connection channels are longitudinally disposed, one column of the pixel openings corresponds to the two longitudinally disposed connection channels, and the two longitudinally disposed connection channels are respectively located on opposite sides of the pixel opening of the corresponding column. .
  • the predetermined color includes: a first color, a second color, and a third color
  • the pixel opening matrix includes: a first pixel opening, a second pixel opening, and a third pixel opening, the first pixel opening Corresponding to the electroluminescent layer of the first color, the second pixel opening corresponds to the electroluminescent layer of the second color, and the third pixel opening corresponds to the electroluminescent layer of the third color ;
  • connection channel on one side of the row of the pixel openings is connected to the first pixel opening of the corresponding row, on the other side of the row of the pixel openings
  • the connection channel is connected to a second pixel opening of a corresponding row.
  • connection channel on one side of the column of the pixel openings is connected to the first pixel opening of the corresponding column, on the other side of the column of the pixel openings
  • the connection channel is connected to a second pixel opening of a corresponding column.
  • the present invention also provides a method of fabricating an electroluminescent device, comprising:
  • the pixel defining layer Forming a pixel defining layer above the substrate, the pixel defining layer enclosing a pixel opening matrix, wherein the pixel defining layer is formed with at least one connecting channel, wherein the connecting channel is used to connect the pixel opening matrix At least two pixel openings of the electroluminescent layer of the same row or column and corresponding to the same color;
  • An electroluminescent layer of a predetermined color is formed in each of the pixel openings in the matrix of pixel openings.
  • the step of forming a pixel defining layer above the substrate comprises:
  • a patterning process is performed on the pixel defining layer substrate to form the pixel opening matrix and the connection channel.
  • connection channel is laterally disposed or longitudinally disposed, wherein the connection channel disposed laterally is used to connect the pixel rows in the same row and corresponding phases All of the pixel openings of the same color electroluminescent layer;
  • connection channel disposed longitudinally is used to connect all of the pixel openings of the electroluminescent layer in the same column and corresponding to the same color in the pixel aperture matrix.
  • connection channels on the pixel defining layer are laterally disposed;
  • connection channels on the pixel defining layer are longitudinally disposed.
  • connection channels when all the connection channels are laterally disposed, the row of the pixel openings corresponds to a laterally disposed connection channel, and the connection channel is located at a side of the corresponding row of the pixel openings;
  • connection channels When all of the connection channels are longitudinally disposed, a column of the pixel openings corresponds to a longitudinally disposed connection channel, and the connection channel is located on a side of the corresponding column of the pixel openings.
  • connection channels when all the connection channels are laterally disposed, the row of the pixel openings corresponds to the two laterally disposed connection channels, and the two laterally disposed connection channels are respectively located in the corresponding rows of the pixels. Both sides of the opening;
  • connection channels When all of the connection channels are longitudinally disposed, one column of the pixel openings corresponds to the two longitudinally disposed connection channels, and the two longitudinally disposed connection channels are respectively located on opposite sides of the pixel opening of the corresponding column. .
  • the predetermined color includes: a first color, a second color, and a third color
  • the pixel opening matrix includes: a first pixel opening, a second pixel opening, and a third pixel opening, the first pixel opening Corresponding to the electroluminescent layer of the first color, the second pixel opening corresponds to the electroluminescent layer of the second color, and the third pixel opening corresponds to the electroluminescent layer of the third color ;
  • connection channel on one side of the row of the pixel openings is connected to the first pixel opening of the corresponding row, on the other side of the row of the pixel openings
  • the connection channel is connected to a second pixel opening of a corresponding row.
  • connection channel on one side of the column of the pixel openings is connected to the first pixel opening of the corresponding column, on the other side of the column of the pixel openings
  • the connection channel is connected to a second pixel opening of a corresponding column.
  • the step of forming an electroluminescent layer of a predetermined color in each pixel opening in the pixel opening matrix comprises:
  • the electroluminescent layer of a third color is formed in the third pixel opening by an evaporation method.
  • the step of forming the electroluminescent layer of the first color and the electroluminescent layer of the second color in the first pixel opening and the second pixel opening, respectively, by using an inkjet method include:
  • the inkjet method respectively forms the electroluminescent layer of a first color in the first pixel opening and the second pixel opening, and
  • the electroluminescent layer step of the second color comprises:
  • the steps of the electroluminescent layer include:
  • the step of forming an electroluminescent layer of a predetermined color in each pixel opening in the pixel opening matrix further includes:
  • the pixel defining layer and the connection channel are surface-treated such that an upper surface of the pixel defining layer is lyophobic, and a bottom surface and/or an inner wall of the connecting channel is lyophilic.
  • the material of the pixel defining layer is polyimide
  • the step of surface treating the pixel defining layer and the connecting channel comprises:
  • Irradiation treatment is performed on the bottom surface and/or the inner wall of the connection channel by ultraviolet light.
  • the reaction gas during the plasma treatment is fluoride.
  • the present invention also provides a display substrate comprising: an electroluminescence device using the above electroluminescent device.
  • the present invention also provides a display device comprising: a display substrate using the above display substrate.
  • the present invention provides an electroluminescent device, a method of fabricating the same, a display substrate, and a display device.
  • the connection channel connections are in the same row or The same column and corresponding to the pixel openings of the electroluminescent layer of the same color, such that when the electroluminescent material solution is dripped into the pixel opening, the pixels in the same row or column and corresponding to the electroluminescent layer of the same color.
  • the amount of the electroluminescent material solution in the opening is the same, and the thickness of the electroluminescent layer formed after the drying process is uniform, thereby ensuring uniformity of illumination of the electroluminescent device and improving the electroluminescent device. Performance.
  • Figure 1 is a cross-sectional view of a prior art electroluminescent device
  • Figure 2 is a plan view of Figure 1;
  • FIG. 3 is a schematic structural diagram of a pixel defining layer in the prior art
  • FIG. 5a is a schematic structural diagram of a pixel defining layer according to Embodiment 1 of the present invention.
  • FIG. 5b is another schematic structural diagram of a pixel defining layer according to Embodiment 1 of the present invention.
  • FIG. 6 is a flowchart of a method of fabricating an electroluminescent device according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic structural diagram of a pixel defining layer according to Embodiment 2 of the present invention.
  • FIG. 8 is a schematic view showing formation of an electroluminescent layer in a pixel opening matrix
  • FIG. 9 is a flowchart of a method of fabricating an electroluminescent device according to Embodiment 3 of the present invention.
  • FIG. 10 is a schematic structural diagram of a pixel defining layer according to Embodiment 3 of the present invention.
  • FIG. 4 is a flow chart of a method for fabricating an electroluminescent device according to Embodiment 1 of the present invention. As shown in FIG. 4, the method includes:
  • Step 101 forming a pixel defining layer above the substrate, the pixel defining layer is surrounded by a pixel opening matrix, and at least one connecting channel is formed on the pixel defining layer, and the connecting channel is used to connect the pixel opening matrix in the same row or the same column And corresponding to at least two pixel openings of the electroluminescent layer of the same color.
  • step 101 includes:
  • Step 1011 forming a pixel defining layer substrate on the substrate
  • Step 1012 Perform a patterning process on the pixel defining layer substrate to form a pixel opening matrix and a connection channel.
  • the material of the pixel defining layer substrate is an insulating material.
  • the material of the pixel defining layer substrate is a polyacyl group.
  • a polyimide film layer having a thickness of 1 to 10 um is formed over a substrate (not shown) by a coating process, and then a patterning process is performed to form a pixel opening matrix and a connection channel 9, respectively.
  • the pixel opening matrix comprises a plurality of pixel openings 4, the regions of which correspond to the display regions of the electroluminescent device, and the regions covered with the pixel defining layer 2 corresponding to the non-display regions of the electroluminescent device.
  • the connection channel formed by the patterning process is used to connect at least two pixel openings of the electroluminescent layer in the same row or column and corresponding to the same color in the pixel aperture matrix.
  • the substrate in this embodiment may be a substrate substrate or an array substrate.
  • the patterning process in this embodiment may include at least: photoresist coating, exposure, development, etching, and photoresist. Stripping and other processes. Further, the above-described steps of forming the pixel opening matrix and forming the connection channel 9 can be completed by one patterning process.
  • connection channels 9 are laterally arranged is shown in Fig. 5a, and the laterally disposed connection channels 9 are connected to all the pixel openings 4 in the same row and corresponding to electroluminescent layers of the same color. Furthermore, all of the connection channels 9 on the pixel defining layer in Fig. 5a are laterally disposed.
  • the above-mentioned electroluminescent layer of the same color refers to an electroluminescent layer which is prepared by the same material and which has the same color of light generated when the light is emitted. In the preparation step subsequent to step 101, it is necessary to form an electroluminescent layer of at least one color in the pixel openings in the pixel opening matrix.
  • connection channel 9 may be formed on the side of the corresponding row of pixel openings 4, the connection channel 9 and the corresponding row All of the pixel openings 4 are connected, that is, one row of pixel openings 4 corresponds to one connection channel 9, as shown in FIG. 5a.
  • FIG. 5b is another schematic structural diagram of a pixel defining layer according to Embodiment 1 of the present invention.
  • FIG. 5b shows a case where the connecting channel 9 is longitudinally disposed, and the longitudinally connected connecting channel 9 is connected.
  • the pixel openings 4 of the same column and corresponding to the electroluminescent layer of the same color, and all the pixel openings 4 in the same column in FIG. 5b correspond to one type of color
  • a longitudinally disposed connecting channel 9 can be formed on the side of the corresponding column pixel opening 4.
  • Step 102 Form an electroluminescent layer of a predetermined color in each pixel opening in the pixel opening matrix.
  • the dropping step 102 will be described in detail below by taking as an example the dropping of the electroluminescent material solution into the pixel opening in the pixel defining layer shown in FIG. 5a.
  • step 102 a solution of a predetermined color of electroluminescent material is first dropped into the pixel opening 4 by means of an ink jet device, and then the electroluminescent material solution is dried by a drying device to form an electroluminescent layer.
  • the electroluminescent material solution in the pixel opening 4 is dripped into the pixel opening 4, since the pixel openings 4 corresponding to the same color are connected to one laterally disposed connection channel 9 in one row of the pixel openings 4, they are laterally disposed.
  • the electroluminescent material solution in the pixel opening connected to the connection channel 9 can flow into the laterally disposed connection channel 9 while the electroluminescent material solution in the laterally disposed connection channel 9 can also flow into it.
  • the pixel is in the opening 4.
  • the amount of the electroluminescent material solution in the one or more pixel openings 4 is excessively large, the liquid level in the pixel opening 4 causing the electroluminescent material solution is raised, and the amount of dripping is excessive at this time.
  • the electroluminescent material solution in the pixel opening 4 flows through the laterally disposed connecting channel 9 into the pixel opening 4 of the electroluminescent material solution having an insufficient amount of dripping, thereby ensuring that the same color is in the same row.
  • the liquid level of the electroluminescent material solution in the pixel opening 4 of the electroluminescent layer is the same, that is, the storage amount of the electroluminescent material solution in the pixel opening 4 is the same. Therefore, the thickness of the electroluminescent layer in the pixel opening 4 corresponding to the electroluminescent layer of the same color in the same row after drying is uniform, thereby ensuring the uniformity of illumination of the electroluminescent device and improving the electric power.
  • the performance of the electroluminescent device is the performance of the electroluminescent device.
  • connection channel 9 regardless of whether the connection channel 9 is disposed laterally or vertically, since the connection channel 9 is located in the non-display area of the electroluminescent device layer, the connection channel 9 does not affect the display of the electroluminescent device.
  • Embodiment 1 of the present invention provides a method for manufacturing an electroluminescent device, Forming a connection channel on the pixel defining layer, the connection channel is in the same row or column and corresponding to the pixel opening of the electroluminescent layer of the same color, so that when the electroluminescent material solution is dripped into the pixel opening,
  • the stocks of the electroluminescent material solutions in the pixel openings of the same row or column and corresponding to the electroluminescent layer of the same color are the same, and the thickness of the electroluminescent layer formed after the drying process is uniform, and further The uniformity of illumination of the electroluminescent device is ensured, and the performance of the electroluminescent device is improved.
  • a laterally disposed connecting channel 9 can be formed on both sides of the pixel opening 4 of the corresponding row.
  • One of the connection channels 9 is connected to the pixel opening 4 corresponding to one color in the corresponding row, and the other connection channel 9 is connected to the pixel opening 4 corresponding to the other color in the corresponding row, that is, the row of pixel openings 4 corresponds to Two connection channels 9.
  • connection channel 9 may be formed on each side of the pixel opening 4 of the corresponding row at most, and the two connection channels 9 are respectively connected to each other.
  • the pixel openings 4 of the electroluminescent layers of two different colors, while the remaining pixel openings 4 in the corresponding rows are not connected to any structure.
  • the electroluminescent device prepared in this embodiment belongs to the second case described above, and includes an electroluminescent layer of three colors, that is, the predetermined color includes: a first color, a second color, and a third color.
  • FIG. 6 is a flowchart of a method for fabricating an electroluminescent device according to Embodiment 2 of the present invention. As shown in FIG. 6, the method includes:
  • Step 201 forming a pixel defining layer above the substrate, the pixel defining layer is surrounded by a pixel opening matrix, two horizontally disposed connecting channels are formed on the pixel defining layer, and one row of pixel openings corresponds to two laterally disposed connecting channels.
  • Two laterally disposed connection channels are respectively located on opposite sides of the corresponding row of pixel openings, one connection channel is connected in the same row and corresponds to at least two pixel openings of the first color electroluminescent layer, and the other connection channel connection is at At least two pixel openings of the same row and corresponding to the electroluminescent layer of the second color.
  • FIG. 7 is a schematic structural diagram of a pixel defining layer according to Embodiment 2 of the present invention.
  • the material of the pixel defining layer 2 is an insulating material.
  • the pixel defining layer 2 is The material is Polyimide.
  • step 201 a polyimide film layer having a thickness of 1 to 10 um is formed over the substrate by a coating process, and then a patterning process is performed to form a pixel opening matrix and a connection channel 9, respectively.
  • the pixel opening matrix includes a first pixel opening 14, a second pixel opening 13 and a third pixel opening 12, wherein the first pixel opening 14 corresponds to the first color electroluminescent layer, and the second pixel opening 13 and the second pixel opening 13 Corresponding to the electroluminescent layer of the color, the third pixel opening 12 corresponds to the electroluminescent layer of the third color.
  • one row of pixel openings corresponds to two laterally disposed connection channels 10, 11, and two laterally disposed connection channels 10, 11 are respectively located on opposite sides of the pixel openings of the corresponding rows.
  • the laterally disposed connection channels 10 located on the upper side of the corresponding row pixel openings are connected to the first pixel openings 14 in the corresponding rows, and are located in the laterally disposed connection channels 11 and corresponding rows on the lower side of the corresponding row pixel openings.
  • the second pixel opening 13 is connected, and the third pixel opening 12 corresponding to the pixel opening in the row is not connected to the above channel.
  • Step 202 Surface-treating the pixel defining layer and the connecting channel so that the upper surface of the pixel defining layer is lyophobic, and the bottom surface and/or the inner wall of the connecting channel are lyophilic.
  • step 202 includes:
  • Step 2021 Perform lyophobic treatment on the upper surface of the pixel defining layer
  • Step 2022 Perform lyophilization treatment on the bottom surface and/or the inner wall of the connection channel.
  • the pixel defining layer 2 is first subjected to a lyophobic treatment, specifically, the layer 2 is defined for the pixel under the condition that the reaction pressure is normal pressure and the reaction gas is fluoride (for example, carbon tetrafluoride).
  • Plasma treatment is performed such that the upper surface of the pixel defining layer 2, the inner walls of the pixel openings (the first pixel opening 14, the second pixel opening 13, and the third pixel opening 12), the bottom surface and the inner wall of the connection channels 10, 11 are provided Liquid repellency.
  • connection channels 10, 11 are subjected to light treatment by ultraviolet light, so that the liquid repellency of the bottom surface and/or the inner wall of the connection channels 10, 11 is lowered to have lyophilic properties.
  • the upper surface of the pixel defining layer 2 is still lyophobic.
  • the overflow of the electroluminescent material solution can be avoided when the electroluminescent material solution droplet is subsequently dropped into the pixel opening.
  • the bottom surface and/or the inner wall of the connection channels 10, 11 are lyophilic, it is possible to facilitate the flow of the electroluminescent material solution in the connection channel.
  • Step 203 forming an electroluminescent layer of a first color in the first pixel opening by using an inkjet method.
  • step 203 includes:
  • Step 2031 injecting a first color electroluminescent material solution in a longitudinal direction in the first pixel opening.
  • step 2031 the nozzle of the inkjet device is located above the first pixel opening 14, and during the dripping, the nozzle moves in the longitudinal direction (the direction indicated by the arrow in the first pixel opening 14 in FIG. 7), thereby The solution of the electroluminescent material solution of the first color is uniformly dropped into the first pixel opening 14.
  • the first color in the first pixel opening 14 having an excessive amount of dripping flows through the laterally disposed connecting channel 10 to the first pixel opening 14 of the electroluminescent material solution that is insufficiently dripped, thus being the first in each of the first pixel openings 14 in the same row.
  • the liquid level of the electroluminescent material solution of the color is such that the stock of the electroluminescent material solution of the first color in each of the first pixel openings 14 in the same row is achieved.
  • Step 2032 Drying the first color electroluminescent material solution in the first pixel opening to form an electroluminescent layer of a first color.
  • step 2032 the electroluminescent material solution of the first color in the first pixel opening 14 after the drying process forms the electroluminescent layer of the first color, and the electroluminescent layer of each first color in the same row The thickness is the same.
  • the width of the laterally disposed connection channel 10 when the width of the laterally disposed connection channel 10 reaches a certain level, it may be in the lateral direction in the laterally connected connection channel 10 connected to the first pixel opening 14 (FIG. 7).
  • the electroluminescent material solution of the first color is dripped in the direction indicated by the arrow in the middle connecting channel 10, and the electroluminescent material solution of the first color flows into the first pixel opening in the corresponding row along the laterally connected connecting channel 10.
  • the first color of the electroluminescent material solution in the first pixel opening 14 is dried to form an electroluminescent layer of a first color. It is also possible by the above steps to form electroluminescent layers of the same color having the same thickness in each of the first pixel openings 14 in the same row.
  • Step 204 forming a second color electro-optic in the second pixel opening by using an inkjet method Light-emitting layer.
  • step 204 is similar to the process of step 203.
  • step 203 For details, refer to the description of step 203.
  • step 203 and step 204 can be performed simultaneously, that is, when the first color of the electroluminescent material solution is dropped into the first pixel opening 14, the second color is simultaneously dropped into the second pixel opening 13. Electroluminescent material solution, and then simultaneously drying the first color electroluminescent material solution and the second color electroluminescent material solution to form a first color electroluminescent layer and a second color electrophoretic Light-emitting layer.
  • Step 205 forming an electroluminescent layer of a third color in the third pixel opening by an evaporation method.
  • a third color electroluminescent layer is deposited in the third pixel opening 12 by an evaporation device.
  • the evaporation process belongs to the prior art and will not be described herein.
  • the evaporation method is used to form the electroluminescent layer of the third color in the third pixel opening 12, so that the thickness of the electroluminescent layer of the third color can be precisely controlled, and the third pixel opening 12 can be ensured.
  • the three color electroluminescent layers have the same thickness.
  • step 203 the order of execution of step 203, step 204, and step 205 is not limited.
  • FIG. 8 is a schematic diagram of forming an electroluminescent layer in a pixel opening matrix. As shown in FIG. 8, as a specific practical design, it is assumed that the first color is red, the second color is green, and the third color is blue. That is, the electroluminescent layer 7 corresponding to the red color is formed in the first pixel opening 14, the electroluminescent layer 6 corresponding to the green is formed in the second pixel opening 13, and the electroluminescent layer 5 corresponding to the blue is formed in the third pixel opening 12.
  • connection channel 10 is located on the upper side of the corresponding row of pixel openings, and connects all of the first pixel openings 14 in the corresponding row
  • the second channel 11 is located on the lower side of the corresponding row of pixel openings, and connects all the second pixels in the corresponding row Opening 13.
  • a blue electroluminescent layer is formed by an inkjet method to form a red electroluminescent layer and a green electroluminescent layer by evaporation.
  • Embodiment 2 of the present invention provides a method of fabricating an electroluminescent device, by forming a connection channel on a pixel defining layer, connecting pixel openings of the same row and corresponding to electroluminescent layers of the same color, thereby So that when the electroluminescent material solution is dripped into the pixel opening, the pixels in the same row and corresponding to the electroluminescent layer of the same color are turned on
  • the stock of the electroluminescent material solution in the mouth is the same, and the thickness of the electroluminescent layer formed after the drying process is uniform, thereby ensuring the uniformity of the illumination of the electroluminescent device and improving the electroluminescent device. performance.
  • a vertical arrangement may be formed on both sides of the pixel opening 4 of the corresponding column. Connect the channel 9.
  • the electroluminescent device prepared in this embodiment includes electroluminescent layers of three colors, that is, the predetermined colors include: a first color, a second color, and a third color.
  • FIG. 9 is a flowchart of a method for fabricating an electroluminescent device according to Embodiment 3 of the present invention. As shown in FIG. 9, the method includes:
  • Step 301 forming a pixel defining layer above the substrate, the pixel defining layer is surrounded by a pixel opening matrix, two longitudinally disposed connecting channels are formed on the pixel defining layer, and one column of pixel openings corresponds to two longitudinally disposed connecting channels.
  • Two longitudinally disposed connection channels are respectively located on opposite sides of the corresponding column pixel opening, one connection channel connection is in the same column and corresponds to at least two pixel openings of the first color electroluminescent layer, and the other connection channel connection is at At least two pixel openings of the same column and corresponding to the second color of the electroluminescent layer.
  • FIG. 10 is a schematic structural diagram of a pixel defining layer according to Embodiment 3 of the present invention.
  • the material of the pixel defining layer 2 is an insulating material.
  • the material of the pixel defining layer 2 is polyimide (Polyimide). ) as an example.
  • step 301 a polyimide film layer having a thickness of 1 to 10 um is formed over the substrate by a coating process, and then a patterning process is performed to form a pixel opening matrix and connection channels 15, 16 respectively.
  • the pixel opening matrix includes a first pixel opening 14, a second pixel opening 13 and a third pixel opening 12, wherein the first pixel opening 14 corresponds to the first color electroluminescent layer, and the second pixel opening 13 and the second pixel opening 13 Corresponding to the electroluminescent layer of the color, the third pixel opening 14 corresponds to the electroluminescent layer of the third color.
  • one column of pixel openings corresponds to two longitudinally disposed connection channels 15, 16, and two longitudinally disposed connection channels 15, 16 are respectively located on opposite sides of the pixel openings of the corresponding columns.
  • the connecting channel 15 disposed in the longitudinal direction of the left side of the corresponding column pixel opening corresponds to The first pixel openings 14 in the column are connected, the longitudinally disposed connection channels 16 on the right side of the corresponding column pixel openings are connected to the second pixel openings 13 in the corresponding columns, and the third pixel openings 12 in the corresponding columns are not associated with any Channel connection.
  • Step 302 Surface-treating the pixel defining layer and the connecting channel so that the upper surface of the pixel defining layer is lyophobic, and the bottom surface and/or the inner wall of the connecting channel are lyophilic.
  • step 302 For the specific process of step 302, reference may be made to the description of step 202 in the foregoing embodiment 2, and details are not described herein again.
  • Step 303 forming an electroluminescent layer of a first color in the first pixel opening by using an inkjet method.
  • step 303 includes:
  • Step 3031 injecting a first color electroluminescent material solution in a longitudinal direction in a longitudinally disposed connection channel connected to the first pixel opening.
  • the nozzle of the ink jet device is located above the connection channel 15 which is connected to the first pixel opening 14 and disposed longitudinally.
  • the nozzle is in the longitudinal direction (in the connection channel 15 in FIG. 10) Moving in the direction indicated by the arrow, so that the first electroluminescent material solution drops evenly into the longitudinally disposed connecting channel 15, and the first color of the electroluminescent material solution flows in the longitudinally disposed connecting channel 15 Corresponding to each of the first pixel openings 14 in the column.
  • the liquid level of the first color of the electroluminescent material solution in each of the first pixel openings 14 in the same column is equal, that is, each of the first pixel openings 14 in the same column is realized.
  • the stock of the electroluminescent material solution of the first color within is the same.
  • Step 3032 Drying the first color electroluminescent material solution in the first pixel opening to form a first color electroluminescent layer.
  • step 3032 the electroluminescent material solution of the first color in the first pixel opening 14 after the drying process forms the electroluminescent layer of the first color, and the electroluminescent layer of each first color in the same column The thickness is the same.
  • the electroluminescent material solution of the first color may be dripped in the longitudinal direction in the first pixel opening 14 to make each of the same column in the same column by adjusting the connection channel 10.
  • the stock of the first color of electroluminescent material solution within the first pixel opening 14 is the same.
  • Step 304 Forming an electroluminescent layer of a second color in the second pixel opening by an inkjet method.
  • step 304 is similar to the process of step 303.
  • step 303 and step 304 can be performed simultaneously.
  • Step 305 forming a third color electroluminescent layer in the third pixel opening by an evaporation method.
  • step 305 For the specific process of step 305, reference may be made to the description of step 205 in the foregoing embodiment 2, and details are not described herein again.
  • the order of the steps 303, 304, and 305 is not limited.
  • Embodiment 3 of the present invention provides a method of fabricating an electroluminescent device, by forming a connection channel on a pixel defining layer, connecting pixel openings in the same column and corresponding to electroluminescent layers of the same color, thereby making When the electroluminescent material solution is dripped into the pixel opening, the stock of the electroluminescent material solution in the pixel openings of the same column and corresponding to the electroluminescent layer of the same color is the same and is formed after the drying process
  • the thickness of the electroluminescent layer is uniform, thereby ensuring uniformity of illumination of the electroluminescent device and improving the performance of the electroluminescent device.
  • Embodiment 4 of the present invention provides an electroluminescent device, comprising: a substrate and a pixel defining layer formed on the substrate, the pixel defining layer enclosing a pixel opening matrix, and the pixel defining layer is formed with at least a connecting channel, each of the pixel openings in the pixel opening matrix is formed with an electroluminescent layer of a predetermined color, and the connecting channel is used to connect the electroluminescent layer in the same row or column of the pixel opening matrix and corresponding to the same color At least two pixel openings.
  • connection channel in this embodiment may be a lateral arrangement or a longitudinal arrangement, wherein the laterally disposed connection channel is used to connect all pixel openings of the electroluminescent layer in the same row and corresponding to the same color in the pixel aperture matrix.
  • the longitudinally disposed connection channel is used to connect all pixel openings of the electroluminescent layer in the same column and corresponding to the same color in the pixel aperture matrix.
  • connection channels on the pixel defining layer 2 are laterally disposed.
  • a laterally disposed connection channel can be formed on the side of the corresponding row of pixel openings 4.
  • a laterally disposed connection channel may be formed on both sides of the pixel opening 4 of the corresponding row.
  • the pixel opening matrix includes: a first pixel opening 14, a second pixel opening 13, and a third pixel opening 12.
  • the predetermined color includes: a first color, a second color, and a third color.
  • the color, the first pixel opening 14 corresponds to the electroluminescent layer of the first color
  • the second pixel opening 12 corresponds to the electroluminescent layer of the second color
  • the third pixel opening corresponds to the electroluminescent layer of the third color.
  • Each row of pixel openings in the pixel opening matrix corresponds to two laterally disposed connection channels 10, 11, and a laterally disposed connection channel 10 and a corresponding row in a side (upper side) of the corresponding row pixel opening A pixel opening 14 is connected, and a laterally disposed connection channel 11 on the other side (lower side) of the corresponding row pixel opening is connected to the second pixel opening 13 in the corresponding row.
  • the adjustment by connecting the channel 10 The effect is that the stocks of the first color electroluminescent material solutions in the first pixel openings 14 in the same row are the same, so that the thickness of the first color electroluminescent layer formed after the drying process is the same.
  • the connection channel 11 By adjusting the connection channel 11, the stock of the electroluminescent material solution of the second color in the second pixel openings 13 in the same row can be made the same, thereby making the electrolysis of the second color formed after the drying process The thickness of the luminescent layer is the same.
  • connection channels on the pixel defining layer are longitudinally disposed.
  • a longitudinally disposed connection channel can be formed on the side of the corresponding column pixel opening.
  • a longitudinally disposed connection channel may be formed on both sides of the pixel opening 4 of the corresponding column.
  • the pixel aperture matrix includes: a first pixel opening 14, a second pixel opening 13 and a third pixel opening 12, the predetermined color comprising: a first color, a second color, and a third color, the first pixel opening 14 corresponding to the electroluminescent layer of the first color,
  • the second pixel opening 12 corresponds to the electroluminescent layer of the second color, and the third pixel opening corresponds to the electroluminescent layer of the third color.
  • Each column of pixel openings in the pixel opening matrix corresponds to two longitudinally disposed connection channels 15, 16 in a longitudinally disposed connection channel 15 and a corresponding column on a side (left side) of the corresponding column pixel opening A pixel opening 14 is connected, and a longitudinally disposed connection channel 16 on the other side (right side) of the corresponding column pixel opening is connected to the second pixel opening 13 in the corresponding column.
  • the adjustment by the connection channel 15 is that the stocks of the first color electroluminescent material solutions in the first pixel openings 14 of the same column are the same, so that the thickness of the first color electroluminescent layer formed after the drying process is the same.
  • the connection channel 16 the stock of the electroluminescent material solution of the second color in the second pixel openings 13 of the same column can be made the same, thereby making the electrolysis of the first color formed after the drying process The thickness of the luminescent layer is the same.
  • connection channel arrangement is not limited thereto, and as another alternative, the connection channel on the pixel defining layer may include both a lateral arrangement and a vertical arrangement.
  • Embodiment 4 of the present invention provides an electroluminescent device, comprising: a substrate substrate and a pixel defining layer, the pixel defining layer enclosing a pixel opening matrix, and at least one connecting channel is formed on the pixel defining layer Forming, in each pixel opening in the pixel opening matrix, an electroluminescent layer of a predetermined color, the connection channel for connecting at least two of the electroluminescent layers in the same row or column and corresponding to the same color in the pixel opening matrix Pixel opening.
  • the present invention makes it possible to inject electroluminescence into a pixel opening by forming a connection channel on the pixel defining layer, connecting pixel openings in the same row or column and corresponding to electroluminescent layers of the same color.
  • the stock of the electroluminescent material solution in the pixel openings of the same row or column and corresponding to the electroluminescent layer of the same color is the same, and the thickness of the electroluminescent layer formed after the drying treatment Consistent, thereby ensuring the uniformity of illumination of the electroluminescent device and improving the electroluminescent device Performance.
  • the fifth embodiment of the present invention provides a display substrate.
  • the display substrate includes an electroluminescent device.
  • the electroluminescent device is the electroluminescent device provided in the fourth embodiment.
  • the display substrate includes the electroluminescent device provided in the fourth embodiment, the light generated by the light emitting surface of the display substrate is relatively uniform, and the display performance is superior.
  • Embodiment 5 of the present invention further provides a display device, comprising: a display substrate, wherein the display substrate adopts the above display substrate.

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Abstract

一种电致发光器件及制造方法、显示基板和显示装置，电致发光器件包括：基板和像素界定层（2），像素界定层围成像素开口矩阵，像素界定层上形成有至少一条连接沟道（9），像素开口矩阵中的每个像素开口（4）内形成有预定颜色的电致发光层，连接沟道连接像素开口矩阵中处于同一行或同一列且对应相同颜色的电致发光层的至少两个像素开口。通过在像素界定层上形成连接沟道，可使得在向像素开口中滴注电致发光材料溶液时，处于同一行或同一列且对应于相同颜色的电致发光层的像素开口中的电致发光材料溶液的存量相等，且经过干燥处理后形成的电致发光层的厚度相同，进而保证了电致发光器件发光的均匀性，提升了电致发光器件的性能。

Description

电致发光器件及其制造方法、显示基板和显示装置 技术领域
本发明涉及显示技术领域，特别涉及电致发光器件及其制造方法、显示基板和显示装置。
背景技术
近年来，在电致发光领域中，在通过喷墨方法来实现电致发光材料的涂布时，为限定出涂布区域以及避免电致发光材料溶液流入到相邻的像素，因此需要在电致发光器件中形成像素界定层。
图1为现有技术中电致发光器件的截面图，图2为图1的俯视图，图3为现有技术中像素界定层的结构示意图，如图1至图3所示，该电致发光器件包括：基板1和形成于基板1的上方的像素界定层2，像素界定层2上围成有像素开口矩阵，该像素开口矩阵与像素单元矩阵对应，即一个像素单元8对应一个像素开口4，在像素开口4内形成有预定颜色的电致发光层3。例如：红色像素单元对应的像素开口4内形成有红色的电致发光层7，绿色像素单元对应的像素开口4内形成有绿色的电致发光层6，蓝色像素单元对应的像素开口4内形成有蓝色的电致发光层5。
以在红色像素单元对应的像素开口4内形成有红色的电致发光层7为例，对采用喷墨方法形成电致发光层的过程进行详细的描述。首先，通过喷墨装置中的两个(或多个)喷嘴分别向对应位置的像素开口内滴注红色的电致发光材料溶液，待滴注过程完成后，再通过干燥装置对红色的电致发光材料溶液进行干燥以形成红色的电致发光层7。
然而在滴注红色的电致发光材料溶液的过程中，由于不同的喷嘴的滴注量可能存在差异，从而使得不同像素开口中的红色电致发光材料溶液的容量不同，进而使得在经过干燥处理后形成红色的电致发 光层7的厚度不同，即电致发光器件中的红色的电致发光层7的厚度不一致。
在现有技术中，如果电致发光器件中相同颜色的电致发光层的厚度不一致，会导致电致发光器件的产生不均匀的光，从而产生云纹(Mura)现象，进而影响电致发光器件的性能。
发明内容
本发明提供一种电致发光器件及其制造方法、显示基板和显示装置，以解决现有技术中相同颜色的电致发光层的厚度不一致的问题。
为实现上述目的，本发明提供了一种电致发光器件，包括：基板和形成于所述基板的上方的像素界定层，所述像素界定层围成有像素开口矩阵，所述像素界定层上形成有至少一条连接沟道，所述像素开口矩阵中的每个像素开口内形成有预定颜色的电致发光层，所述连接沟道用于连接所述像素开口矩阵中处于同一行或同一列且对应相同颜色的电致发光层的至少两个像素开口。
可选地，所述连接沟道横向设置或纵向设置，其中，横向设置的所述连接沟道用于连接所述像素开口矩阵中处于同一行且对应相同颜色的电致发光层的全部所述像素开口；
纵向设置的所述连接沟道用于连接所述像素开口矩阵中处于同一列且对应相同颜色的电致发光层的全部所述像素开口。
可选地，所述像素界定层上的全部所述连接沟道均横向设置；
或者，所述像素界定层上的全部所述连接沟道均纵向设置。
可选地，当全部所述连接沟道均横向设置时，一行所述像素开口对应一条横向设置的所述连接沟道，所述连接沟道位于对应行所述像素开口的一侧；
当全部所述连接沟道均纵向设置时，一列所述像素开口对应一条纵向设置的所述连接沟道，所述连接沟道位于对应列所述像素开口的一侧。
可选地，当全部所述连接沟道均横向设置时，一行所述像素开 口对应两条横向设置的所述连接沟道，两条横向设置的所述连接沟道分别位于对应行所述像素开口的两侧；
当全部所述连接沟道均纵向设置时，一列所述像素开口对应两条纵向设置的所述连接沟道，两条纵向设置的所述连接沟道分别位于对应列所述像素开口的两侧。
可选地，所述预定颜色包括：第一颜色、第二颜色和第三颜色，所述像素开口矩阵包括：第一像素开口、第二像素开口和第三像素开口，所述第一像素开口与第一颜色的所述电致发光层对应，所述第二像素开口与第二颜色的所述电致发光层对应，所述第三像素开口与第三颜色的所述电致发光层对应；
当全部所述连接沟道均横向设置时，位于一行所述像素开口的一侧的所述连接沟道与对应行的所述第一像素开口连接，位于一行所述像素开口的另一侧的所述连接沟道与对应行的第二像素开口连接。
当全部所述连接沟道均纵向设置时，位于一列所述像素开口的一侧的所述连接沟道与对应列的所述第一像素开口连接，位于一列所述像素开口的另一侧的所述连接沟道与对应列的第二像素开口连接。
为实现上述目的，本发明还提供了一种电致发光器件的制造方法，包括：
在基板的上方形成像素界定层，所述像素界定层围成有像素开口矩阵，所述像素界定层上形成有至少一条连接沟道，所述连接沟道用于连接所述像素开口矩阵中处于同一行或同一列且对应相同颜色的电致发光层的至少两个像素开口；
在所述像素开口矩阵中的每个像素开口内形成预定颜色的电致发光层。
可选地，所述在基板的上方形成像素界定层的步骤包括：
在所述基板的上方形成像素界定层基材；
对所述像素界定层基材进行构图工艺以形成所述像素开口矩阵和所述连接沟道。
可选地，所述连接沟道横向设置或纵向设置，其中，横向设置的所述连接沟道用于连接所述像素开口矩阵中处于同一行且对应相 同颜色的电致发光层的全部所述像素开口；
纵向设置的所述连接沟道用于连接所述像素开口矩阵中处于同一列且对应相同颜色的电致发光层的全部所述像素开口。
可选地，所述像素界定层上的全部所述连接沟道均横向设置；
或者，所述像素界定层上的全部所述连接沟道均纵向设置。
可选地，当全部所述连接沟道均横向设置时，一行所述像素开口对应一条横向设置的所述连接沟道，所述连接沟道位于对应行所述像素开口的一侧；
当全部所述连接沟道均纵向设置时，一列所述像素开口对应一条纵向设置的所述连接沟道，所述连接沟道位于对应列所述像素开口的一侧。
可选地，当全部所述连接沟道均横向设置时，一行所述像素开口对应两条横向设置的所述连接沟道，两条横向设置的所述连接沟道分别位于对应行所述像素开口的两侧；
当全部所述连接沟道均纵向设置时，一列所述像素开口对应两条纵向设置的所述连接沟道，两条纵向设置的所述连接沟道分别位于对应列所述像素开口的两侧。
可选地，所述预定颜色包括：第一颜色、第二颜色和第三颜色，所述像素开口矩阵包括：第一像素开口、第二像素开口和第三像素开口，所述第一像素开口与第一颜色的所述电致发光层对应，所述第二像素开口与第二颜色的所述电致发光层对应，所述第三像素开口与第三颜色的所述电致发光层对应；
当全部所述连接沟道均横向设置时，位于一行所述像素开口的一侧的所述连接沟道与对应行的所述第一像素开口连接，位于一行所述像素开口的另一侧的所述连接沟道与对应行的第二像素开口连接。
当全部所述连接沟道均纵向设置时，位于一列所述像素开口的一侧的所述连接沟道与对应列的所述第一像素开口连接，位于一列所述像素开口的另一侧的所述连接沟道与对应列的第二像素开口连接。
可选地，所述在所述像素开口矩阵中的每个像素开口内形成预定颜色的电致发光层的步骤包括：
采用喷墨方法在所述第一像素开口和所述第二像素开口内分别形成第一颜色的所述电致发光层和第二颜色的所述电致发光层；
采用蒸镀方法在所述第三像素开口内形成第三颜色的所述电致发光层。
可选地，所述采用喷墨方法在所述第一像素开口和所述第二像素开口内分别形成第一颜色的所述电致发光层和第二颜色的所述电致发光层的步骤包括：
在所述第一像素开口和所述第二像素开口内沿纵向方向分别滴注第一颜色的电致发光材料溶液和第二颜色的电致发光材料溶液；
对第一颜色的所述电致发光材料溶液和第二颜色的所述电致发光材料溶液进行干燥处理，以分别形成第一颜色的所述电致发光层和第二颜色的电致发光层。
可选地，当全部所述连接沟道均横向设置时，所述采用喷墨方法在所述第一像素开口和所述第二像素开口内分别形成第一颜色的所述电致发光层和第二颜色的所述电致发光层步骤包括：
在连接于所述第一像素开口的所述连接沟道内和连接于所述第二像素开口的所述连接沟道内沿横向方向分别滴注第一颜色的电致发光材料溶液和第二颜色的电致发光材料溶液，第一颜色的所述电致发光材料溶液沿所述连接沟道流入所述第一像素开口内，第二颜色的所述电致发光材料溶液沿所述连接沟道流入所述第二像素开口内；
对第一颜色的所述电致发光材料溶液和第二颜色的所述电致发光材料溶液进行干燥处理，以分别形成第一颜色的所述电致发光层和第二颜色的电致发光层；
当全部所述连接沟道均纵向设置时，所述采用喷墨方法在所述第一像素开口和所述第二像素开口内分别形成第一颜色的所述电致发光层和第二颜色的所述电致发光层的步骤包括：
在连接于所述第一像素开口的所述连接沟道内和连接于所述第二像素开口的所述连接沟道内沿纵向方向分别滴注第一颜色的电致发光材料溶液和第二颜色的电致发光材料溶液，第一颜色的所述电致发光材料溶液沿所述连接沟道流入所述第一像素开口内，第二颜色的 所述电致发光材料溶液沿所述连接沟道流入所述第二像素开口内；
对第一颜色的所述电致发光材料溶液和第二颜色的所述电致发光材料溶液进行干燥处理，以分别形成第一颜色的所述电致发光层和第二颜色的电致发光层。
可选地，所述在所述像素开口矩阵中的每个像素开口内形成预定颜色的电致发光层的步骤之前还包括：
对所述像素界定层和所述连接沟道进行表面处理，以使所述像素界定层的上表面具备疏液性，所述连接沟道的底面和/或内壁具备亲液性。
可选地，所述像素界定层的材料为聚酰亚胺，所述对所述像素界定层和所述连接沟道进行表面处理的步骤包括：
对所述像素界定层的上表面、所述连接沟道的底面和/或内壁进行等离子体处理；
对所述连接沟道的底面和/或内壁进行紫外光进行照射处理。
可选地，所述等离子体处理时的反应气体为氟化物。
为实现上述目的，本发明还提供了一种显示基板，包括：电致发光器件，该电致发光器件采用上述的电致发光器件。
为实现上述目的，本发明还提供了一种显示装置，包括：显示基板，该显示基板采用上述的显示基板。
本发明具有以下有益效果：
本发明提供一种电致发光器件及其制造方法、显示基板和显示装置，在该电致发光器件的制造方法中，通过在像素界定层上形成连接沟道，连接沟道连接处于同一行或同一列且对应于相同颜色的电致发光层的像素开口，从而使得在向像素开口中滴注电致发光材料溶液时，处于同一行或同一列且对应于相同颜色的电致发光层的像素开口中的电致发光材料溶液的存量是相同的，且经过干燥处理后所形成的电致发光层的厚度是一致的，进而保证了电致发光器件发光的均匀性，提升了电致发光器件的性能。
附图说明
图1为现有技术中电致发光器件的截面图；
图2为图1的俯视图；
图3为现有技术中像素界定层的结构示意图；
图4为本发明实施例一提供的电致发光器件的制造方法的流程图；
图5a为本发明实施例一中像素界定层的一种结构示意图；
图5b为本发明实施例一中像素界定层的另一种结构示意图；
图6为本发明实施例二提供的电致发光器件的制造方法的流程图；
图7为本发明实施例二中像素界定层的结构示意图；
图8为在像素开口矩阵内形成电致发光层的示意图；
图9为本发明实施例三提供的电致发光器件的制造方法的流程图；
图10为本发明实施例三中像素界定层的结构示意图。
具体实施方式
为使本领域的技术人员更好地理解本发明的技术方案，下面结合附图对本发明提供的电致发光器件及其制造方法、显示基板和显示装置进行详细描述。
实施例一
图4为本发明实施例一提供的电致发光器件的制造方法的流程图，如图4所示，包括：
步骤101：在基板的上方形成像素界定层，像素界定层围成有像素开口矩阵，像素界定层上形成有至少一条连接沟道，连接沟道用于连接像素开口矩阵中处于同一行或同一列且对应相同颜色的电致发光层的至少两个像素开口。
可选地，步骤101包括：
步骤1011：在基板的上方形成像素界定层基材；
步骤1012：对像素界定层基材进行构图工艺以形成像素开口矩阵和连接沟道。
图5a为本发明实施例一中像素界定层的一种结构示意图，如图5a所示，该像素界定层基材的材料为绝缘材料，本实施例以像素界定层基材的材料为聚酰亚胺(Polyimide)为例。在步骤101中，通过涂布工艺以在基板(未示出)的上方形成厚度为1～10um的聚酰亚胺膜层，再通过构图工艺以分别形成像素开口矩阵和连接沟道9，其中，该像素开口矩阵包括若干个像素开口4，这些像素开口4所处的区域对应于电致发光器件的显示区域，而覆盖有像素界定层2的区域对应于电致发光器件的非显示区域。通过构图工艺形成的连接沟道用于连接像素开口矩阵中处于同一行或同一列且对应相同颜色的电致发光层的至少两个像素开口。
需要说明的是，本实施例中的基板具体可为衬底基板或者阵列基板，本实施例中的构图工艺是指至少可包括：光刻胶涂覆、曝光、显影、刻蚀、光刻胶剥离等工艺。此外，上述形成像素开口矩阵以及形成连接沟道9的步骤可通过一次构图工艺完成。
在图5a中仅示出了连接沟道9为横向设置的情况，且横向设置的连接沟道9连接处于同一行且对应于相同颜色的电致发光层的全部像素开口4。此外，在图5a中像素界定层上的全部连接沟道9均横向设置。
需要进一步说明的是，上述相同颜色的电致发光层是指采用相同材料进行制备且在发光时所产生的光的颜色是相同的电致发光层。在步骤101之后的制备步骤中，需要在像素开口矩阵中的这些像素开口中形成至少一种颜色的电致发光层。
若处于同一行的所有像素开口4都对应一种颜色的电致发光层时，则可在对应行像素开口4的一侧形成一条横向设置的连接沟道9，该连接沟道9与对应行中全部的像素开口4都连接，即一行像素开口4对应一条连接沟道9，具体情况可参见图5a。
图5b为本发明实施例一中像素界定层的另一种结构示意图，如图5b所示，图5b中示出了连接沟道9为纵向设置的情况，纵向设置的连接沟道9连接处于同一列且对应于相同颜色的电致发光层的像素开口4，且在图5b中处于同一列的所有像素开口4都对应一种颜 色的电致发光层时，则可在对应列像素开口4的一侧形成一条纵向设置的连接沟道9。
步骤102：在像素开口矩阵中的每个像素开口内形成预定颜色的电致发光层。
下面以向图5a所示的像素界定层中的像素开口滴注电致发光材料溶液为例，对滴注步骤102进行详细说明。
在步骤102中，首先利用喷墨装置在像素开口4中滴注预定颜色的电致发光材料溶液，然后再利用干燥装置对电致发光材料溶液进行干燥处理以形成电致发光层。
具体地，在向像素开口4中滴注电致发光材料溶液时，由于在一行像素开口4中，对应于相同颜色的像素开口4均与一条横向设置连接沟道9连接，因此被横向设置的连接沟道9连接的像素开口中的电致发光材料溶液可流入至该横向设置的连接沟道9中，同时该横向设置的连接沟道9中的电致发光材料溶液也可以流入到与其连接的像素开口4中。当一个或多个像素开口4中的电致发光材料溶液的滴注量过多时，则会使得像素开口4内的导致电致发光材料溶液的液面升高时，此时滴注量过多的像素开口4中的电致发光材料溶液会通过横向设置的连接沟道9流向电致发光材料溶液的滴注量不足的像素开口4中，从而保证了处于同一行中的对应于相同颜色的电致发光层的像素开口4中的电致发光材料溶液的液面等高，即实现像素开口4内电致发光材料溶液的存储量相同。因此，经过干燥处理后处于同一行中对应于相同颜色的电致发光层的像素开口4中的电致发光层的厚度是一致的，从而保证了电致发光器件发光的均匀性，提升了电致发光器件的性能。
需要说明的是，向图5b所示的像素界定层中的像素开口4滴注电致发光材料溶液的过程与上述过程类似，此处不再赘述。
此外，无论连接沟道9是横向设置还是纵向设置，由于连接沟道9位于电致发光器件层的非显示区域，因此连接沟道9不会对电致发光器件的显示造成影响。
本发明实施例一提供了一种电致发光器件的制造方法，通过在 像素界定层上形成连接沟道，连接沟道连接处于同一行或同一列且对应于相同颜色的电致发光层的像素开口，从而使得在向像素开口中滴注电致发光材料溶液时，处于同一行或同一列且对应于相同颜色的电致发光层的像素开口中的电致发光材料溶液的存量是相同的，且经过干燥处理后所形成的电致发光层的厚度是一致的，进而保证了电致发光器件发光的均匀性，提升了电致发光器件的性能。
实施例二
在上述实施例一的基础上，若处于同一行的像素开口4对应两种颜色的电致发光层时，则可在对应行的像素开口4的两侧分别形成一条横向设置的连接沟道9，其中一条连接沟道9与对应行中对应于一种颜色的像素开口4连接，另一条连接沟道9与对应行中对应于另一种颜色的像素开口4连接，即一行像素开口4对应两条连接沟道9。
若处于同一行的像素开口4对应两种以上颜色的电致发光层时，则可最多在对应行的像素开口4的两侧分别形成一条连接沟道9，两条连接沟道9分别连接对应于两种不同颜色的电致发光层的像素开口4，而对应行中剩余的像素开口4则不与任何结构连接。
本实施例制备出的电致发光器件属于上述第二种情形，其中包括三种颜色的电致发光层，即预定颜色包括：第一颜色、第二颜色和第三颜色。
图6为本发明实施例二提供的电致发光器件的制造方法的流程图，如图6所示，包括：
步骤201：在基板的上方形成像素界定层，像素界定层围成有像素开口矩阵，像素界定层上形成有两条横向设置的连接沟道，一行像素开口对应两条横向设置的连接沟道，两条横向设置的连接沟道分别位于对应行像素开口的两侧，一条连接沟道连接处于同一行且对应第一颜色的电致发光层的至少两个像素开口，另一条连接沟道连接处于同一行且对应第二颜色的电致发光层的至少两个像素开口。
图7为本发明实施例二中像素界定层的结构示意图，如图7所示，该像素界定层2的材料为绝缘材料，本实施例以像素界定层2 的材料为聚酰亚胺(Polyimide)为例。在步骤201中，通过涂布工艺以在基板的上方形成厚度为1～10um的聚酰亚胺膜层，再通过构图工艺以分别形成像素开口矩阵和连接沟道9。其中，像素开口矩阵包括第一像素开口14、第二像素开口13和第三像素开口12，其中，第一像素开口14与第一颜色的电致发光层对应，第二像素开口13与第二颜色的电致发光层对应，第三像素开口12与第三颜色的电致发光层对应。
在图7中，一行像素开口对应两条横向设置的连接沟道10、11，两条横向设置的连接沟道10、11分别位于对应行的像素开口的两侧。其中，位于对应行像素开口的上侧的横向设置的连接沟道10与对应行中的第一像素开口14连接，位于对应行像素开口的下侧的横向设置的连接沟道11与对应行中的第二像素开口13连接，对应行中像素开口的第三像素开口12不与上述沟道连接。
步骤202：对像素界定层和连接沟道进行表面处理，以使像素界定层的上表面具备疏液性，连接沟道的底面和/或内壁具备亲液性。
可选地，步骤202包括：
步骤2021：对像素界定层的上表面进行疏液化处理；
步骤2022：对连接沟道的底面和/或内壁进行亲液化处理。
在步骤2021和步骤2022中，首先对像素界定层2进行疏液化处理，具体地，在反应压强为常压，反应气体为氟化物(例如：四氟化碳)的条件下对像素界定层2进行等离子体处理，使得像素界定层2的上表面、像素开口(第一像素开口14、第二像素开口13和第三像素开口12)的内壁、连接沟道10、11的底面和内壁均具备疏液性。然后，再利用紫外光对连接沟道10、11的底面和/或内壁进行光照处理，从而使得连接沟道10、11的底面和/或内壁的疏液性下降从而具备亲液性。此时，像素界定层2的上表面仍具备疏液性。
由于像素界定层2的上表面具备疏液性，因此在后续向像素开口滴注电致发光材料溶液滴时，可避免电致发光材料溶液的溢流。同时，由于连接沟道10、11的底面和/或内壁具备亲液性，因此可便于电致发光材料溶液在连接沟道中流动。
步骤203：采用喷墨方法在第一像素开口内形成第一颜色的电致发光层。
可选地，步骤203包括：
步骤2031：在第一像素开口内沿纵向方向滴注第一颜色的电致发光材料溶液。
在步骤2031中，喷墨装置的喷嘴位于第一像素开口14的上方，在进行滴注的过程中，喷嘴沿纵向方向(图7中第一像素开口14内箭头所指方向)进行移动，从而使得第一颜色的电致发光材料溶液滴均匀的滴入至第一像素开口14内。当处于同一行中的一个或多个第一像素开口14中的第一颜色的电致发光材料溶液的滴注量过多时，则滴注量过多的第一像素开口14中的第一颜色的电致发光材料溶液会通过横向设置的连接沟道10流向电致发光材料溶液的滴注量不足的第一像素开口14，因此处于同一行中的每个第一像素开口14内的第一颜色的电致发光材料溶液的液面等高，即实现了处于同一行中的每个第一像素开口14内的第一颜色的电致发光材料溶液的存量相同。
步骤2032：对第一像素开口内的第一颜色的电致发光材料溶液进行干燥处理以形成第一颜色的电致发光层。
在步骤2032中，经过干燥处理后第一像素开口14内第一颜色的电致发光材料溶液形成第一颜色的电致发光层，且处于同一行中的每个第一颜色的电致发光层的厚度是相同的。
需要说明的是，在本实施例中，当横向设置的连接沟道10的宽度达到一定程度时，可在连接于第一像素开口14的横向设置的连接沟道10内沿横向方向(图7中连接沟道10内箭头所指方向)滴注第一颜色的电致发光材料溶液，第一颜色的电致发光材料溶液沿横向设置的连接沟道10流入对应行中的各第一像素开口14内，然后再对第一像素开口14内的第一颜色的电致发光材料溶液进行干燥处理以形成第一颜色的电致发光层。通过该上述步骤也能实现在处于同一行中的每个第一像素开口14内形成厚度相同的第一颜色的电致发光层。
步骤204：采用喷墨方法在第二像素开口内形成第二颜色的电致 发光层。
步骤204的过程与步骤203的过程类似，具体可参见对步骤203的描述。
需要说明的是，步骤203与步骤204可同时进行，即在向第一像素开口14内滴注第一颜色的电致发光材料溶液时，同时向第二像素开口13内滴注第二颜色的电致发光材料溶液，然后再对第一颜色的电致发光材料溶液和第二颜色的电致发光材料溶液同时进行干燥处理，以形成第一颜色的电致发光层和第二颜色的电致发光层。
步骤205：采用蒸镀方法在第三像素开口内形成第三颜色的电致发光层。
在步骤205中，通过蒸镀设备在第三像素开口12内沉积第三颜色的电致发光层，该蒸镀过程属于现有技术，此处不再赘述。采用蒸镀方法来在第三像素开口12内形成第三颜色的电致发光层，可对第三颜色的电致发光层的厚度进行精准控制，同时能保证各第三像素开口12内的第三颜色的电致发光层的厚度相同。
需要说明的是，在本实施例提供的制造方法中，对步骤203、步骤204和步骤205的执行顺序没有限制。
图8为在像素开口矩阵内形成电致发光层的示意图，如图8所示，作为一种具体的实用设计，假定第一颜色为红色，第二颜色为绿色，第三颜色为蓝色，即第一像素开口14内对应形成红色的电致发光层7，第二像素开口13内对应形成绿色的电致发光层6，第三像素开口12内对应形成蓝色的电致发光层5。连接沟道10位于对应行像素开口的上侧，且连接对应行中全部的第一像素开口14，第二沟道11位于对应行像素开口的下侧，且连接对应行中全部的第二像素开口13。通过喷墨方法以形成红色的电致发光层和绿色的电致发光层，通过蒸镀的方法以形成蓝色的电致发光层。
本发明实施例二提供了一种电致发光器件的制造方法，通过在像素界定层上形成连接沟道，连接沟道连接处于同一行且对应于相同颜色的电致发光层的像素开口，从而使得在向像素开口中滴注电致发光材料溶液时，处于同一行且对应于相同颜色的电致发光层的像素开 口中的电致发光材料溶液的存量是相同的，且经过干燥处理后所形成的电致发光层的厚度是一致的，进而保证了电致发光器件发光的均匀性，提升了电致发光器件的性能。
实施例三
在上述实施例一的基础上，若处于同一列的像素开口4对应两种或两种以上颜色的电致发光层时，则可在对应列的像素开口4的两侧分别形成一条纵向设置的连接沟道9。
本实施例制备出的电致发光器件中包括三种颜色的电致发光层，即预定颜色包括：第一颜色、第二颜色和第三颜色。
图9为本发明实施例三提供的电致发光器件的制造方法的流程图，如图9所示，包括：
步骤301：在基板的上方形成像素界定层，像素界定层围成有像素开口矩阵，像素界定层上形成有两条纵向设置的连接沟道，一列像素开口对应两条纵向设置的连接沟道，两条纵向设置的连接沟道分别位于对应列像素开口的两侧，一条连接沟道连接处于同一列且对应第一颜色的电致发光层的至少两个像素开口，另一条连接沟道连接处于同一列且对应第二颜色的电致发光层的至少两个像素开口。
图10为本发明实施例三中像素界定层的结构示意图，如图10所示，该像素界定层2的材料为绝缘材料，本实施例以像素界定层2的材料为聚酰亚胺(Polyimide)为例。在步骤301中，通过涂布工艺以在基板的上方形成厚度为1～10um的聚酰亚胺膜层，再通过构图工艺以分别形成像素开口矩阵和连接沟道15、16。其中，像素开口矩阵包括第一像素开口14、第二像素开口13和第三像素开口12，其中，第一像素开口14与第一颜色的电致发光层对应，第二像素开口13与第二颜色的电致发光层对应，第三像素开口14与第三颜色的电致发光层对应。
在图10中，一列像素开口对应两条纵向设置的连接沟道15、16，两条纵向设置的连接沟道15、16分别位于对应列的像素开口的两侧。其中，位于对应列像素开口的左侧的纵向设置的连接沟道15与对应 列中的第一像素开口14连接，位于对应列像素开口的右侧的纵向设置的连接沟道16与对应列中的第二像素开口13连接，对应列中的第三像素开口12不与任何沟道连接。
步骤302：对像素界定层和连接沟道进行表面处理，以使像素界定层的上表面具备疏液性，连接沟道的底面和/或内壁具备亲液性。
步骤302具体过程可参照上述实施例二中对步骤202的描述，此处不再赘述。
步骤303：采用喷墨方法在第一像素开口内形成第一颜色的电致发光层。
可选地，步骤303包括：
步骤3031：在连接于第一像素开口的纵向设置的连接沟道内沿纵向方向滴注第一颜色的电致发光材料溶液。
在步骤3031中，喷墨装置的喷嘴位于连接于第一像素开口14且纵向设置的连接沟道15的上方，在进行滴注的过程中，喷嘴沿纵向方向(图10中连接沟道15内箭头所指方向)进行移动，从而使得第一电致发光材料溶液滴均匀的滴入至纵向设置的连接沟道15内，第一颜色的电致发光材料溶液沿纵向设置的连接沟道15流入对应列中的各第一像素开口14内。当滴注完成后，处于同一列中的每个第一像素开口14内的第一颜色的电致发光材料溶液的液面等高，即实现了处于同一列中的每个第一像素开口14内的第一颜色的电致发光材料溶液的存量相同。
步骤3032：对第一像素开口内的第一颜色的电致发光材料溶液进行干燥处理以形成第一颜色的电致发光层。
在步骤3032中，经过干燥处理后第一像素开口14内第一颜色的电致发光材料溶液形成第一颜色的电致发光层，且处于同一列中的每个第一颜色的电致发光层的厚度是相同的。
需要说明的是，在步骤303中，也可以在第一像素开口14内沿纵向方向滴注第一颜色的电致发光材料溶液，通过连接沟道10的调节作用，使得处于同一列中的每个第一像素开口14内的第一颜色的电致发光材料溶液的存量相同。
步骤304：采用喷墨方法在第二像素开口内形成第二颜色的电致发光层。
步骤304的过程与步骤303的过程类似，具体可参见对步骤303的描述。需要说明的是，步骤303与步骤304可同时进行。
步骤305：采用蒸镀方法在第三像素开口内形成第三颜色的电致发光层。
步骤305具体过程可参照上述实施例二中对步骤205的描述，此处不再赘述。
需要说明的是，在本实施例提供的制造方法中，对步骤303、步骤304和步骤305的先后顺序没有限制。
本发明实施例三提供一种电致发光器件的制造方法，通过在像素界定层上形成连接沟道，连接沟道连接处于同一列且对应于相同颜色的电致发光层的像素开口，从而使得在向像素开口中滴注电致发光材料溶液时，处于同一列且对应于相同颜色的电致发光层的像素开口中的电致发光材料溶液的存量是相同的，且经过干燥处理后所形成的电致发光层的厚度是一致的，进而保证了电致发光器件发光的均匀性，提升了电致发光器件的性能。
实施例四
本发明实施例四提供了一种电致发光器件，该电致发光器件包括：基板和形成于基板的上方的像素界定层，像素界定层围成有像素开口矩阵，像素界定层上形成有至少一条连接沟道，像素开口矩阵中的每个像素开口内形成有预定颜色的电致发光层，连接沟道用于连接像素开口矩阵中处于同一行或同一列且对应相同颜色的电致发光层的至少两个像素开口。
具体地，本实施例中的连接沟道可以为横向设置或纵向设置，其中，横向设置的连接沟道用于连接像素开口矩阵中处于同一行且对应相同颜色的电致发光层的全部像素开口；纵向设置的连接沟道用于连接像素开口矩阵中处于同一列且对应相同颜色的电致发光层的全部像素开口。
作为一种可选方案，像素界定层2上的全部连接沟道均横向设置。具体地，参见图5a，当处于同一行的所有像素开口4都对应一种颜色的电致发光层时，则可在对应行像素开口4的一侧形成一条横向设置的连接沟道。此外，当处于同一行的所有像素开口4对应两种或两种以上的颜色的电致发光层时，则可在对应行的像素开口4的两侧分别形成一条横向设置的连接沟道。
作为一种具体的应用方案，参见图7，该像素开口矩阵包括：第一像素开口14、第二像素开口13和第三像素开口12，预定颜色包括：第一颜色、第二颜色和第三颜色，第一像素开口14与第一颜色的电致发光层对应，第二像素开口12与第二颜色的电致发光层对应，第三像素开口与第三颜色的电致发光层对应。该像素开口矩阵中的每一行像素开口均对应两条横向设置的连接沟道10、11，位于对应行像素开口的一侧(上侧)的横向设置的连接沟道10与对应行中的第一像素开口14连接，位于对应行像素开口的另一侧(下侧)的横向设置的连接沟道11与对应行中的第二像素开口13连接。因此，在通过喷墨方法在第一像素开口14和第二像素开口13内分别形成第一颜色的电致发光层和第二颜色的电致发光层的过程中，通过连接沟道10的调节作用，可使得处于同一行的各第一像素开口14中的第一颜色的电致发光材料溶液的存量相同，进而使得干燥处理后形成的第一颜色的电致发光层的厚度都是相同的；通过连接沟道11的调节作用，可使得处于同一行的各第二像素开口13中的第二颜色的电致发光材料溶液的存量相同，进而使得干燥处理后形成的第二颜色的电致发光层的厚度都是相同的。
作为另一种可选方案，像素界定层上的全部连接沟道均纵向设置。具体地，参见图5b，当处于同一列的所有像素开口4都对应一种颜色的电致发光层时，则可在对应列像素开口的一侧形成一条纵向设置的连接沟道。此外，当处于同一列的所有像素开口4对应两种或两种以上的颜色的电致发光层时，则可在对应列的像素开口4的两侧分别形成一条纵向设置的连接沟道。
作为另一种具体的应用方案，参见图10，该像素开口矩阵包括： 第一像素开口14、第二像素开口13和第三像素开口12，预定颜色包括：第一颜色、第二颜色和第三颜色，第一像素开口14与第一颜色的电致发光层对应，第二像素开口12与第二颜色的电致发光层对应，第三像素开口与第三颜色的电致发光层对应。该像素开口矩阵中的每一列像素开口均对应两条纵向设置的连接沟道15、16，位于对应列像素开口的一侧(左侧)的纵向设置的连接沟道15与对应列中的第一像素开口14连接，位于对应列像素开口的另一侧(右侧)的纵向设置的连接沟道16与对应列中的第二像素开口13连接。因此，在通过喷墨方法在第一像素开口14和第二像素开口13内分别形成第一颜色的电致发光层和第二颜色的电致发光层的过程中，通过连接沟道15的调节作用，可使得处于同一列的各第一像素开口14中的第一颜色的电致发光材料溶液的存量相同，进而使得干燥处理后形成的第一颜色的电致发光层的厚度都是相同的；通过连接沟道16的调节作用，可使得处于同一列的各第二像素开口13中的第二颜色的电致发光材料溶液的存量相同，进而使得干燥处理后形成的第一颜色的电致发光层的厚度都是相同的。
当然，连接沟道设置的形式并不局限于此，作为另一种可选方案，该像素界定层上的连接沟道可同时包含横向设置和纵向设置的情形。
本发明实施例四提供了一种电致发光器件，该电致发光器件包括：衬底基板和像素界定层，像素界定层围成有像素开口矩阵，像素界定层上形成有至少一条连接沟道，像素开口矩阵中的每个像素开口内形成有预定颜色的电致发光层，连接沟道用于连接像素开口矩阵中处于同一行或同一列且对应相同颜色的电致发光层的至少两个像素开口。本发明在通过在像素界定层上形成连接沟道，连接沟道连接处于同一行或同一列且对应于相同颜色的电致发光层的像素开口，从而使得在向像素开口中滴注电致发光材料溶液时，处于同一行或同一列且对应于相同颜色的电致发光层的像素开口中的电致发光材料溶液的存量是相同的，且经过干燥处理后所形成的电致发光层的厚度是一致的，进而保证了电致发光器件发光的均匀性，提升了电致发光器件 的性能。
实施例五
本发明实施例五提供了一种显示基板，该显示基板包括：电致发光器件，该电致发光器件采用上述实施例四中提供的电致发光器件，具体内容可参见上述实施例四中的描述，此处不再赘述。由于该显示基板包括上述实施例四提供的电致发光器件，因此该显示基板的发光面产生的光线相对均匀，显示性能较优。
此外，本发明实施例五还提供了一种显示装置，该显示装置包括：显示基板，该显示基板采用上述的显示基板。
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。

Claims (21)

  1. 一种电致发光器件，包括：基板和形成于所述基板的上方的像素界定层，所述像素界定层围成像素开口矩阵，所述像素界定层上形成有至少一条连接沟道，所述像素开口矩阵中的每个像素开口内形成有预定颜色的电致发光层，所述连接沟道用于连接所述像素开口矩阵中处于同一行或同一列且对应相同颜色的电致发光层的至少两个像素开口。
  2. 根据权利要求1所述的电致发光器件，其中，所述连接沟道横向设置或纵向设置，其中，横向设置的所述连接沟道用于连接所述像素开口矩阵中处于同一行且对应相同颜色的电致发光层的全部所述像素开口；
    纵向设置的所述连接沟道用于连接所述像素开口矩阵中处于同一列且对应相同颜色的电致发光层的全部所述像素开口。
  3. 根据权利要求2所述的电致发光器件，其中，所述像素界定层上的全部所述连接沟道均横向设置；
    或者，所述像素界定层上的全部所述连接沟道均纵向设置。
  4. 根据权利要求3所述的电致发光器件，其中，当全部所述连接沟道均横向设置时，一行所述像素开口对应一条横向设置的所述连接沟道，所述连接沟道位于对应行所述像素开口的一侧；
    当全部所述连接沟道均纵向设置时，一列所述像素开口对应一条纵向设置的所述连接沟道，所述连接沟道位于对应列所述像素开口的一侧。
  5. 根据权利要求3所述的电致发光器件，其中，当全部所述连接沟道均横向设置时，一行所述像素开口对应两条横向设置的所述连接沟道，两条横向设置的所述连接沟道分别位于对应行所述像素开口 的两侧；
    当全部所述连接沟道均纵向设置时，一列所述像素开口对应两条纵向设置的所述连接沟道，两条纵向设置的所述连接沟道分别位于对应列所述像素开口的两侧。
  6. 根据权利要求5所述的电致发光器件，其中，所述预定颜色包括：第一颜色、第二颜色和第三颜色，所述像素开口矩阵包括：第一像素开口、第二像素开口和第三像素开口，所述第一像素开口与第一颜色的所述电致发光层对应，所述第二像素开口与第二颜色的所述电致发光层对应，所述第三像素开口与第三颜色的所述电致发光层对应；
    当全部所述连接沟道均横向设置时，位于一行所述像素开口的一侧的所述连接沟道与对应行的所述第一像素开口连接，位于一行所述像素开口的另一侧的所述连接沟道与对应行的第二像素开口连接；
    当全部所述连接沟道均纵向设置时，位于一列所述像素开口的一侧的所述连接沟道与对应列的所述第一像素开口连接，位于一列所述像素开口的另一侧的所述连接沟道与对应列的第二像素开口连接。
  7. 一种电致发光器件的制造方法，包括：
    在基板的上方形成像素界定层，所述像素界定层围成有像素开口矩阵，所述像素界定层上形成有至少一条连接沟道，所述连接沟道用于连接所述像素开口矩阵中处于同一行或同一列且对应相同颜色的电致发光层的至少两个像素开口；
    在所述像素开口矩阵中的每个像素开口内形成预定颜色的电致发光层。
  8. 根据权利要求7所述的电致发光器件的制造方法，其中，所述在基板的上方形成像素界定层的步骤包括：
    在所述基板的上方形成像素界定层基材；
    对所述像素界定层基材进行构图工艺以形成所述像素开口矩阵 和所述连接沟道。
  9. 根据权利要求7所述的电致发光器件的制造方法，其中，所述连接沟道横向设置或纵向设置，其中，横向设置的所述连接沟道用于连接所述像素开口矩阵中处于同一行且对应相同颜色的电致发光层的全部所述像素开口；
    纵向设置的所述连接沟道用于连接所述像素开口矩阵中处于同一列且对应相同颜色的电致发光层的全部所述像素开口。
  10. 根据权利要求7所述的电致发光器件的制造方法，其中，所述像素界定层上的全部所述连接沟道均横向设置；
    或者，所述像素界定层上的全部所述连接沟道均纵向设置。
  11. 根据权利要求10所述的电致发光器件的制造方法，其中，当全部所述连接沟道均横向设置时，一行所述像素开口对应一条横向设置的所述连接沟道，所述连接沟道位于对应行所述像素开口的一侧；
    当全部所述连接沟道均纵向设置时，一列所述像素开口对应一条纵向设置的所述连接沟道，所述连接沟道位于对应列所述像素开口的一侧。
  12. 根据权利要求10所述的电致发光器件的制造方法，其中，当全部所述连接沟道均横向设置时，一行所述像素开口对应两条横向设置的所述连接沟道，两条横向设置的所述连接沟道分别位于对应行所述像素开口的两侧；
    当全部所述连接沟道均纵向设置时，一列所述像素开口对应两条纵向设置的所述连接沟道，两条纵向设置的所述连接沟道分别位于对应列所述像素开口的两侧。
  13. 根据权利要求12所述的电致发光器件的制造方法，其中， 所述预定颜色包括：第一颜色、第二颜色和第三颜色，所述像素开口矩阵包括：第一像素开口、第二像素开口和第三像素开口，所述第一像素开口与第一颜色的所述电致发光层对应，所述第二像素开口与第二颜色的所述电致发光层对应，所述第三像素开口与第三颜色的所述电致发光层对应；
    当全部所述连接沟道均横向设置时，位于一行所述像素开口的一侧的所述连接沟道与对应行的所述第一像素开口连接，位于一行所述像素开口的另一侧的所述连接沟道与对应行的第二像素开口连接；
    当全部所述连接沟道均纵向设置时，位于一列所述像素开口的一侧的所述连接沟道与对应列的所述第一像素开口连接，位于一列所述像素开口的另一侧的所述连接沟道与对应列的第二像素开口连接。
  14. 根据权利要求13所述的电致发光器件的制造方法，其中，所述在所述像素开口矩阵中的每个像素开口内形成预定颜色的电致发光层的步骤包括：
    采用喷墨方法在所述第一像素开口和所述第二像素开口内分别形成第一颜色的所述电致发光层和第二颜色的所述电致发光层；
    采用蒸镀方法在所述第三像素开口内形成第三颜色的所述电致发光层。
  15. 根据权利要求14所述的电致发光器件的制造方法，其中，所述采用喷墨方法在所述第一像素开口和所述第二像素开口内分别形成第一颜色的所述电致发光层和第二颜色的所述电致发光层的步骤包括：
    在所述第一像素开口和所述第二像素开口内沿纵向方向分别滴注第一颜色的电致发光材料溶液和第二颜色的电致发光材料溶液；
    对第一颜色的所述电致发光材料溶液和第二颜色的所述电致发光材料溶液进行干燥处理，以分别形成第一颜色的所述电致发光层和第二颜色的电致发光层。
  16. 根据权利要求14所述的电致发光器件的制造方法，其中，当全部所述连接沟道均横向设置时，所述采用喷墨方法在所述第一像素开口和所述第二像素开口内分别形成第一颜色的所述电致发光层和第二颜色的所述电致发光层的步骤包括：
    在连接于所述第一像素开口的所述连接沟道内和连接于所述第二像素开口的所述连接沟道内沿横向方向分别滴注第一颜色的电致发光材料溶液和第二颜色的电致发光材料溶液，第一颜色的所述电致发光材料溶液沿所述连接沟道流入所述第一像素开口内，第二颜色的所述电致发光材料溶液沿所述连接沟道流入所述第二像素开口内；
    对第一颜色的所述电致发光材料溶液和第二颜色的所述电致发光材料溶液进行干燥处理，以分别形成第一颜色的所述电致发光层和第二颜色的电致发光层；
    当全部所述连接沟道均纵向设置时，所述采用喷墨方法在所述第一像素开口和所述第二像素开口内分别形成第一颜色的所述电致发光层和第二颜色的所述电致发光层的步骤包括：
    在连接于所述第一像素开口的所述连接沟道内和连接于所述第二像素开口的所述连接沟道内沿纵向方向分别滴注第一颜色的电致发光材料溶液和第二颜色的电致发光材料溶液，第一颜色的所述电致发光材料溶液沿所述连接沟道流入所述第一像素开口内，第二颜色的所述电致发光材料溶液沿所述连接沟道流入所述第二像素开口内；
    对第一颜色的所述电致发光材料溶液和第二颜色的所述电致发光材料溶液进行干燥处理，以分别形成第一颜色的所述电致发光层和第二颜色的电致发光层。
  17. 根据权利要求7所述的电致发光器件的制造方法，其中，所述在所述像素开口矩阵中的每个像素开口内形成预定颜色的电致发光层的步骤之前还包括：
    对所述像素界定层和所述连接沟道进行表面处理，以使所述像素界定层的上表面具备疏液性，所述连接沟道的底面和/或内壁具备亲液性。
  18. 根据权利要求17所述的电致发光器件的制造方法，其中，所述像素界定层的材料为聚酰亚胺，所述对所述像素界定层和所述连接沟道进行表面处理的步骤包括：
    对所述像素界定层的上表面、所述连接沟道的底面和/或内壁进行等离子体处理；
    对所述连接沟道的底面和/或内壁进行紫外光照射处理。
  19. 根据权利要求18所述的电致发光器件的制造方法，其中，所述等离子体处理时的反应气体为氟化物。
  20. 一种显示基板，包括：如上述权利要求1-6中任一所述的电致发光器件。
  21. 一种显示装置，包括：如上述权利要求20中所述的显示基板。
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