WO2021082042A1 - 显示面板及其制作方法 - Google Patents

显示面板及其制作方法 Download PDF

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Publication number
WO2021082042A1
WO2021082042A1 PCT/CN2019/116387 CN2019116387W WO2021082042A1 WO 2021082042 A1 WO2021082042 A1 WO 2021082042A1 CN 2019116387 W CN2019116387 W CN 2019116387W WO 2021082042 A1 WO2021082042 A1 WO 2021082042A1
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Prior art keywords
color conversion
layer
perovskite
water
oxygen barrier
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PCT/CN2019/116387
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English (en)
French (fr)
Inventor
段淼
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深圳市华星光电半导体显示技术有限公司
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Priority to US16/620,505 priority Critical patent/US11374062B2/en
Publication of WO2021082042A1 publication Critical patent/WO2021082042A1/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
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/66—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing germanium, tin or lead
    • C09K11/664—Halogenides
    • C09K11/665—Halogenides with alkali or alkaline earth metals
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/844—Encapsulations
    • 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
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/126—Shielding, e.g. light-blocking means over the TFTs
    • 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
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/50—Organic perovskites; Hybrid organic-inorganic perovskites [HOIP], e.g. CH3NH3PbI3
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/14—Carrier transporting layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/14—Carrier transporting layers
    • H10K50/15—Hole transporting layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/14—Carrier transporting layers
    • H10K50/16—Electron transporting layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/17—Carrier injection layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/17—Carrier injection layers
    • H10K50/171—Electron injection layers
    • 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]
    • H10K50/18—Carrier blocking layers
    • 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]
    • H10K50/18—Carrier blocking layers
    • H10K50/181—Electron blocking 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
    • 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
    • H10K59/127—Active-matrix OLED [AMOLED] displays comprising two substrates, e.g. display comprising OLED array and TFT driving circuitry on different substrates
    • H10K59/1275—Electrical connections of the two substrates
    • 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
    • H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels

Definitions

  • the present application relates to the technical field of display panels, and in particular to a display panel and a manufacturing method thereof.
  • OLED Organic Light Emitting Diode
  • RGB Red, Green, Blue
  • FMM Fine Metal Mask
  • SBS Three sub-pixel side by side (Side by Side, SBS) type OLED display.
  • SBS Tin Metal Mask
  • Another way to achieve full-color display is white light OLED+RGB filter (Color Filter, CF) technology.
  • Organic-inorganic hybrid perovskite materials have excellent photoelectric properties such as high fluorescence quantum efficiency, low defect state density, adjustable optical band gap and high carrier mobility.
  • the notarization efficiency of solar cells using perovskite materials as light-absorbing materials has reached 24.2%, which exceeds that of polysilicon.
  • Perovskite materials can not only be used as light-absorbing materials in solar cells, but also gradually used as light-emitting materials in LEDs.
  • perovskite materials can also be used as color conversion film materials, combined with AMOLED (Active-matrix Organic light emitting diode (active matrix organic light emitting diode) has developed into a new type of display device, namely Pe-OLED, which has the advantages of pure chromaticity, wide color gamut, and low cost.
  • AMOLED Active-matrix Organic light emitting diode (active matrix organic light emitting diode) has developed into a new type of display device, namely Pe-OLED, which has the advantages of pure chromaticity, wide color gamut, and low cost.
  • perovskite material Due to the narrow half-width of the perovskite material ( ⁇ 30 nm), its color conversion effect is equivalent to or even better than that of the quantum dot color conversion film.
  • quantum dot materials such as Cd series
  • perovskite materials have the advantages of low raw material cost and simple synthesis, but their own stability is worse than inorganic quantum dot materials, and they are relatively resistant to moisture and oxygen. Poor. Therefore, the structure of the perovskite color conversion film needs to be adjusted and optimized to improve its stability.
  • the present application provides a display panel and a manufacturing method thereof.
  • a water and oxygen barrier layer on the perovskite color conversion functional layer, the problem of poor stability of the color conversion layer using perovskite as a material in the display panel is solved.
  • the present application provides a display panel, which includes a base substrate and a pixel definition layer and a color conversion layer sequentially arranged on the base substrate; the pixel definition layer is provided with pixel openings, and the color conversion layer is located on the base substrate. In the pixel opening;
  • the color conversion layer includes a perovskite color conversion function layer and a first water and oxygen barrier layer; the first water and oxygen barrier layer is located on a side of the perovskite color conversion function layer away from the base substrate.
  • the perovskite color conversion functional layer includes a multi-layer stacked perovskite color conversion film, and the perovskite color conversion layer is disposed on any two adjacent layers. The second water and oxygen barrier between the membranes.
  • the material of the first water and oxygen barrier layer includes polymethyl methacrylate.
  • the material of the first water and oxygen barrier layer and the second water and oxygen barrier layer are the same.
  • the first water and oxygen barrier layer is located on the perovskite color conversion function layer and the pixel definition layer.
  • the pixel openings include a plurality of sub-pixel openings distributed in an array; the color conversion layer is located in the plurality of sub-pixel openings;
  • the perovskite color conversion film in each sub-pixel opening includes a red conversion film, a green conversion film, or a blue conversion film.
  • the material of the red conversion film includes CH 3 NH 3 Pb(Br/I) 3 or CsPb(Br/I) 3
  • the material of the green conversion film includes CH 3 NH 3 PbBr 3 or CsPbBr 3
  • the material of the blue conversion film includes CH 3 NH 3 Pb(Br/Cl) 3 or CsPb(Br/Cl) 3 .
  • the display panel further includes a TFT array substrate disposed opposite to the base substrate, and a blue OLED device located between the base substrate and the TFT array substrate The color conversion layer is located on a side of the base substrate close to the blue OLED device.
  • a color filter is further provided between the base substrate and the pixel definition layer; the color filter includes color colors corresponding to the pixel openings. Resistance, and a light-shielding layer arranged around the color color resistance.
  • An embodiment of the present application also provides a display panel, including a base substrate and a pixel definition layer and a color conversion layer sequentially arranged on the base substrate; the pixel definition layer is provided with pixel openings, and the color conversion The layer is located in the pixel opening;
  • the color conversion layer includes a first perovskite color conversion film and a second perovskite color conversion film that are stacked and arranged between the first perovskite color conversion film and the second perovskite color conversion film.
  • the second water and oxygen barrier layer, and the first water and oxygen barrier layer disposed on the side of the second perovskite color conversion film away from the base substrate.
  • the material of the first water and oxygen barrier layer includes polymethyl methacrylate; the material of the first water and oxygen barrier layer is the same as that of the second water and oxygen barrier layer .
  • the thickness of the first perovskite color conversion film and the first perovskite color conversion film are the same.
  • the embodiment of the present application also provides a manufacturing method of a display panel, which includes the following steps:
  • a perovskite color conversion function layer and a first water and oxygen barrier layer are sequentially formed in the pixel opening to obtain a color conversion layer.
  • the step of sequentially forming the perovskite color conversion function layer and the first water and oxygen barrier layer in the pixel openings includes the following steps:
  • Inkjet printing technology is used to form a multilayer perovskite color conversion film in the pixel opening, and a second water and oxygen barrier layer is formed between any two adjacent perovskite color conversion films to form a perovskite color Conversion function layer;
  • a first water and oxygen barrier layer is formed on the perovskite color conversion functional layer.
  • the material of the first water and oxygen barrier layer includes polymethyl methacrylate.
  • the material of the first water and oxygen barrier layer and the second water and oxygen barrier layer are the same.
  • the material of the perovskite color conversion functional layer in the color conversion layer includes perovskite materials with better color conversion effects, due to the resistance of perovskite materials to moisture and oxygen Relatively poor, the first water and oxygen barrier layer is provided on the perovskite color conversion function layer, which can effectively seal the perovskite color conversion function layer in the pixel opening, and prevent the perovskite material from contacting moisture and oxygen.
  • the stability of the perovskite color conversion functional layer is improved, that is, the stability of the color conversion layer is improved.
  • FIG. 1 is a schematic diagram of a part of the structure of a display panel provided by an embodiment of the application
  • FIG. 2 is a schematic diagram of a part of the structure of another display panel provided by an embodiment of the application.
  • FIG. 3 is a schematic top view of a color conversion layer provided by an embodiment of the application.
  • Fig. 4 is a schematic cross-sectional structure diagram at A-A' in Fig. 3;
  • Fig. 5 is a schematic diagram of another cross-sectional structure at A-A' in Fig. 3;
  • Fig. 6 is a schematic diagram of another cross-sectional structure at A-A' in Fig. 3;
  • FIG. 7 is a schematic block diagram of a process flow of a manufacturing method of a display panel provided by an embodiment of the application.
  • FIG. 8 is a schematic structural flow diagram of a method for manufacturing a color conversion layer according to an embodiment of the application.
  • FIG. 9 is a schematic structural flow diagram of another method for manufacturing a color conversion layer according to an embodiment of the application.
  • connection should be understood in a broad sense, unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection.
  • Connected or integrally connected it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • connection should be understood in a broad sense, unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection.
  • Connected or integrally connected it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • the specific meanings of the above-mentioned terms in this application can be understood under specific circumstances.
  • an embodiment of the present application provides a display panel 1, including a base substrate 2, and a pixel definition layer 3 and a color conversion layer 4 sequentially disposed on the base substrate 2; the pixel definition layer 3 There is a pixel opening 5, and the color conversion layer 4 is located in the pixel opening 5; the color conversion layer 4 includes a perovskite color conversion functional layer 6 and a first water and oxygen barrier layer 7; the first water and oxygen barrier layer 7 is located in the perovskite
  • the color conversion function layer 6 is away from the side of the base substrate 2.
  • the material of the perovskite color conversion functional layer 6 includes a perovskite material; the material of the first water and oxygen barrier layer 7 includes polymethyl methacrylate.
  • the display panel 1 further includes a TFT (Thin Film Transistor (thin film transistor) array substrate 8, and blue OLED device 9 located between the base substrate 2 and TFT array substrate 8, the color conversion layer 4 is located on the side of the base substrate 2 close to the blue OLED device 9; blue OLED device 9 It includes an anode, a hole injection layer, a hole transport layer, a blue light emitting layer, an electron transport layer, an electron blocking layer and a cathode which are sequentially arranged on the TFT array substrate 8.
  • the blue OLED device 9 can also be replaced with a white OLED device, which is not limited here; the blue OLED device 9 is also provided with an encapsulation layer (not shown in the figure).
  • the material of the perovskite color conversion functional layer 6 in the color conversion layer 4 includes a perovskite material with a better color conversion effect. Because the perovskite material has relatively poor resistance to moisture and oxygen, The first water-oxygen barrier layer 7 is provided on the perovskite color conversion functional layer 6, which can effectively seal the perovskite color conversion functional layer 6 in the pixel opening 5 to prevent the perovskite material from contacting moisture and oxygen, thereby The stability of the perovskite color conversion functional layer 6 is improved, that is, the stability of the color conversion layer 4 is improved.
  • a color filter 10 may be further provided between the base substrate 2 and the pixel definition layer 3; the color filter 10 includes a color resist 11 ( For example, red color resist, green color resist or blue color resist), and a light-shielding layer 12 arranged around the color resist 11; a protective layer is also provided between the color filter 10 and the pixel definition layer 3 (not shown in the figure) .
  • the color filter 10 can filter out part of the light source that is not converted by the color conversion layer 4, which is beneficial to improve the display effect of the display panel 1.
  • the pixel opening 5 includes a plurality of sub-pixel openings 13 distributed in an array; the color conversion layer 4 is located in the plurality of sub-pixel openings 13; the perovskite in each sub-pixel opening 13
  • the mineral color conversion functional layer 6 includes a red conversion film 14, a green conversion film 15 or a blue conversion film 16.
  • the material comprises a red conversion film 14 CH 3 NH 3 Pb (Br / I) 3 or CsPb (Br / I) 3, a material comprising a green conversion film 15 CH 3 NH 3 PbBr 3 or CsPbBr 3, blue conversion film
  • the material of 16 includes CH 3 NH 3 Pb(Br/Cl) 3 or CsPb(Br/Cl) 3 ; among them, the red conversion film 14 can be excited to produce red light, and the green conversion film 15 can be excited to produce green light and blue light. The conversion film 16 can be excited to produce blue light.
  • the plurality of sub-pixel openings 13 include red sub-pixel openings 17, green sub-pixel openings 18, and blue sub-pixel openings 19 arranged at intervals; a red conversion film 14, a green conversion film 15 and a blue conversion film.
  • the film 16 is provided corresponding to the red sub-pixel opening 17, the green sub-pixel opening 18, and the blue sub-pixel opening 19, respectively.
  • the color conversion layer 4 may be a monochromatic color conversion layer 4, that is, the perovskite color conversion functional layer 6 in the color conversion layer 4 is excited to generate monochromatic light, which may be red light, green light or blue light.
  • the color conversion layer 4 can also be a color color conversion layer 4, that is, the material of the perovskite color conversion function layer 6 located in different sub-pixel openings 13 is different, and the corresponding light color is also different; it can be based on the needs of the product The material of the perovskite color conversion functional layer 6 located in the different pixel openings 5 is selected.
  • the embodiment of the present application provides a display panel 1.
  • the perovskite color conversion functional layer 6 includes a multi-layer stacked perovskite color conversion film 20, and The second water and oxygen barrier layer 21 between any two adjacent perovskite color conversion films 20; for example, the perovskite color conversion functional layer 6 includes a first perovskite color conversion film 22 and a second perovskite color conversion film 22
  • the mineral color conversion film 23, the second water and oxygen barrier layer 21 is disposed between the first perovskite color conversion film 22 and the second perovskite color conversion film 23, and the first water and oxygen barrier layer 7 is located on the second perovskite
  • the color conversion film 23 is on.
  • the materials of the first water and oxygen barrier layer 7 and the second water and oxygen barrier layer 21 are the same.
  • the thickness of the first perovskite color conversion film 22 and the first perovskite color conversion film 23 may be the same or different, and there is no limitation here.
  • the perovskite color conversion functional layer 6 includes a multi-layer stacked perovskite color conversion film 20, and a second water and oxygen barrier is provided between any two adjacent perovskite color conversion films 20.
  • the double protection of the layer 21, the first water and oxygen barrier layer 7 and the second water and oxygen barrier layer 21 can more effectively isolate the perovskite color conversion functional layer 6 from moisture and oxygen, thereby improving the perovskite color conversion functional layer
  • the stability of 6, that is, the stability of the color conversion layer 4 is improved.
  • the pixel opening 5 includes a plurality of sub-pixel openings 13 distributed in an array; the color conversion layer 4 is located in the plurality of sub-pixel openings 13; the perovskite color conversion in each sub-pixel opening 13
  • the film 20 includes a red conversion film 14, a green conversion film 15 or a blue conversion film 16.
  • the material of each layer of the perovskite color conversion film 20 in the same sub-pixel opening 13 is the same (emits light of the same color).
  • the material comprises a red conversion film 14 CH 3 NH 3 Pb (Br / I) 3 or CsPb (Br / I) 3, a material comprising a green conversion film 15 CH 3 NH 3 PbBr 3 or CsPbBr 3, blue conversion film
  • the material of 16 includes CH 3 NH 3 Pb(Br/Cl) 3 or CsPb(Br/Cl) 3 ; among them, the red conversion film 14 can be excited to produce red light, and the green conversion film 15 can be excited to produce green light and blue light. The conversion film 16 can be excited to produce blue light.
  • the multiple sub-pixel openings 13 include red sub-pixel openings 17, green sub-pixel openings 18, and blue sub-pixel openings 19 arranged at intervals; each layer of perovskite color conversion film 20 in the red sub-pixel openings 17 is The red conversion film 14, each layer of perovskite color conversion film 20 in the green sub-pixel opening 18 is a green conversion film 15, and each layer of perovskite color conversion film 20 in the blue sub-pixel opening 19 is blue ⁇ 16 ⁇ Color conversion film 16.
  • the color conversion layer 4 may be a monochromatic color conversion layer 4, that is, the perovskite color conversion functional layer 6 in the color conversion layer 4 is excited to generate monochromatic light, which may be red light, green light or blue light.
  • the color conversion layer 4 can also be a color color conversion layer 4, that is, the material of the perovskite color conversion film 20 located in different sub-pixel openings 13 is different, and the corresponding light color is different; it can be carried out according to the needs of the product Select the light-emitting color type of the color conversion layer 4.
  • the embodiment of the present application provides a display panel 1.
  • the first water and oxygen barrier layer 7 is located on the perovskite color conversion function layer 6 and the pixel definition layer 3.
  • the first water and oxygen barrier layer 7 covers the perovskite color conversion function layer 6 and the pixel definition layer 3, which can prevent moisture and oxygen from coming from the contact interface between the first water and oxygen barrier layer 7 and the pixel definition layer 3.
  • the perovskite color conversion function layer 6 is further sealed in the pixel opening 5 to prevent the perovskite material from contacting moisture and oxygen, thereby improving the stability of the perovskite color conversion function layer 6, that is, improving the color Stability of conversion layer 4
  • an embodiment of the present application also provides a manufacturing method of a display panel, including the following steps:
  • S702 forming a pixel definition layer on the base substrate; the pixel definition layer is provided with pixel openings;
  • S703 sequentially forming a perovskite color conversion function layer and a first water and oxygen barrier layer in the pixel opening to obtain a color conversion layer.
  • step S703 includes the following steps:
  • Inkjet printing technology is used to form a multilayer perovskite color conversion film 20 in the pixel opening 5, and a second water and oxygen barrier layer 21 is formed between any two adjacent perovskite color conversion films 20 to form a perovskite color conversion film 20.
  • the display panel 1 further includes a TFT array substrate 8 disposed opposite to the base substrate 2, and a blue OLED device 9 located between the base substrate 2 and the TFT array substrate 8.
  • the color conversion layer 4 is located close to the base substrate 2.
  • One side of the blue OLED device 9; the blue OLED device 9 includes an anode, a hole injection layer, a hole transport layer, a blue light emitting layer, an electron transport layer, an electron blocking layer, and a cathode sequentially arranged on the TFT array substrate 8.
  • the blue OLED device 9 can also be replaced with a white OLED device, which is not limited here.
  • the first water-oxygen barrier layer 7 in the color conversion layer 4 can effectively seal the perovskite color conversion functional layer 6 in the pixel opening 5 to avoid calcium
  • the titanium ore material is in contact with moisture and oxygen, thereby improving the stability of the perovskite color conversion functional layer 6, that is, the stability of the color conversion layer 4 is improved.
  • an embodiment of the present application also provides a method for manufacturing the color conversion layer 4, which includes the following steps:
  • the first water-oxygen barrier layer 7 can effectively seal the perovskite color conversion functional layer 6 in the pixel opening 5 to avoid the perovskite material and moisture.
  • the stability of the perovskite color conversion functional layer 6 is improved, that is, the stability of the color conversion layer 4 is improved.
  • an embodiment of the present application also provides a method for manufacturing the color conversion layer 4, which includes the following steps:
  • the target volume of the perovskite ink is divided into multiple inkjet printing, taking the two-layer perovskite color conversion film 20 as an example. If the target volume of the perovskite ink is 20 drops in each sub-pixel opening 13, the number of printed drops of the perovskite ink during the formation of the first perovskite color conversion film 22 is 10 drops, and then the printed substrate The substrate 2 is placed in the VCD cavity and kept at a certain pressure (for example, 50 Pa) at room temperature for about 5 minutes to form the first perovskite color conversion film 22, as shown in e and f in FIG.
  • a certain pressure for example, 50 Pa
  • a certain thickness of polymethyl methacrylate polymer ink is ink-jet printed on a perovskite color conversion film 22 and cured to form a second water and oxygen barrier layer 21, as shown in g and h in FIG. 9; 10 drops of perovskite ink are printed on the second water and oxygen barrier layer 21 and placed in the VCD cavity and processed according to the drying conditions of the first perovskite color conversion film 22 to form a first perovskite color conversion film 23, as shown in the figure 9 in the i and j; then inkjet printing a certain thickness of polymethyl methacrylate polymer ink on the first perovskite color conversion film 23 and curing it to form the first water and oxygen barrier layer 7 ,
  • the cross structure of the two-layer perovskite color conversion film 20-water and oxygen barrier layer is obtained, that is, the color conversion layer 4 is obtained, as shown by k and m in FIG. 9.
  • the double protection of the first water and oxygen barrier layer 7 and the second water and oxygen barrier layer 21 can effectively seal the perovskite color conversion functional layer 6 in the pixel.
  • the perovskite material is prevented from contacting moisture and oxygen, thereby improving the stability of the perovskite color conversion functional layer 6, that is, the stability of the color conversion layer 4 is improved.

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Abstract

本申请提供了一种显示面板及其制作方法，显示面板包括衬底基板以及依次设置在所述衬底基板上的像素定义层和色转换层；所述像素定义层上设有像素开口，所述色转换层位于所述像素开口中；所述色转换层包括钙钛矿色转换功能层和第一水氧阻挡层；所述第一水氧阻挡层位于所述钙钛矿色转换功能层远离所述衬底基板的一侧。

Description

显示面板及其制作方法 技术领域
本申请涉及显示面板技术领域，尤其涉及一种显示面板及其制作方法。
 背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有技术。
有机发光二极管(Organic Light Emitting Diode，OLED)显示器的主要技术路线是红绿蓝(Red、Green、Blue，RGB)三基色发光，用精细金属掩膜板(Fine Metal Mask，FMM)制备红绿蓝三个子像素并排(Side by Side，SBS)式OLED显示器。但是随着市场对分辨率要求越来越高，受FMM精度限制，这种技术路线也显得越来越力不从心。另外一种实现全彩显示的方法是白光OLED+RGB滤光片(Color Filter，CF)技术，由于利用到了成熟的CF技术，不受FMM精度限制，因此可用于制备高分辨率OLED显示器，但是，这种方式获得的三原色饱和度较低，显示器色域不够广(NTSC色域<90％)。还有一种实现全彩的方案是基于蓝光OLED，并借助绿光与红光色彩转换方法(Color conversion method，CCM)，由蓝光激发红绿光色转换材料使其发光而得到红绿蓝三基色，实现彩色显示。
有机-无机杂化钙钛矿（perovskite）材料具有荧光量子效率高、缺陷态密度低、光学带隙可调和载流子迁移率高等优异的光电性能。特别地，以钙钛矿材料作为吸光材料的太阳能电池公证效率已经达到24.2%，超过了多晶硅。钙钛矿材料不仅可以作为吸光材料应用于太阳能电池，而且也被逐步作为发光材料应用于LED，除此之外，钙钛矿材料还可以作为色转换膜材料，再搭配AMOLED（Active-matrix organic light emitting diode，有源矩阵有机发光二极体）发展成为新型显示器件，即Pe-OLED，这种新型发光显示器件具有色度纯、色域广、成本低等优势。
由于钙钛矿材料的半峰宽较窄（<30 nm），因此其色转换效果与量子点色转换膜相当甚至更好。与传统量子点材料（如Cd系）相比，钙钛矿材料具有原料成本低廉和合成简单等优势，但是其本身的稳定性较无机量子点材料差，且对水分和氧气的耐受性相对较差。因此，钙钛矿色转换膜的结构需要调整和优化，以提高其稳定性。
 技术问题
本申请提供一种显示面板及其制作方法，通过在钙钛矿色转换功能层上设置水氧阻挡层，解决了显示面板中以钙钛矿为材料的色转换层稳定性差的问题。
 技术解决方案
为解决上述问题，本申请提供的技术方案如下：
本申请提供了一种显示面板，包括衬底基板以及依次设置在所述衬底基板上的像素定义层和色转换层；所述像素定义层上设有像素开口，所述色转换层位于所述像素开口中；
所述色转换层包括钙钛矿色转换功能层和第一水氧阻挡层；所述第一水氧阻挡层位于所述钙钛矿色转换功能层远离所述衬底基板的一侧。
在本申请实施例所提供的显示面板中，所述钙钛矿色转换功能层包括多层堆叠设置的钙钛矿色转换膜，以及设置在任意相邻的两层所述钙钛矿色转换膜之间的第二水氧阻挡层。
在本申请实施例所提供的显示面板中，所述第一水氧阻挡层的材料包括聚甲基丙烯酸甲酯。
在本申请实施例所提供的显示面板中，所述第一水氧阻挡层和所述第二水氧阻挡层的材料相同。
在本申请实施例所提供的显示面板中，所述第一水氧阻挡层位于所述钙钛矿色转换功能层和所述像素定义层上。
在本申请实施例所提供的显示面板中，所述像素开口包括呈阵列分布的多个子像素开口；所述色转换层位于所述多个子像素开口中；
每个子像素开口中的钙钛矿色转换膜包括红色转换膜、绿色转换膜或蓝色转换膜。
在本申请实施例所提供的显示面板中，所述红色转换膜的材料包括CH 3NH 3Pb(Br/I) 3或者CsPb(Br/I) 3，所述绿色转换膜的材料包括CH 3NH 3PbBr 3或者CsPbBr 3，所述蓝色转换膜的材料包括CH 3NH 3Pb(Br/Cl) 3或者CsPb(Br/Cl) 3。
在本申请实施例所提供的显示面板中，所述显示面板还包括与所述衬底基板相对设置的TFT阵列基板，以及位于所述衬底基板和所述TFT阵列基板之间的蓝光OLED器件，所述色转换层位于所述衬底基板靠近所述蓝光OLED器件的一侧。
在本申请实施例所提供的显示面板中，所述衬底基板和所述像素定义层之间还设有彩色滤光片；所述彩色滤光片包括与所述像素开口对应设置的彩色色阻，以及围绕所述彩色色阻设置的遮光层。
本申请实施例还提供了一种显示面板，包括衬底基板以及依次设置在所述衬底基板上的像素定义层和色转换层；所述像素定义层上设有像素开口，所述色转换层位于所述像素开口中；
所述色转换层包括堆叠设置的第一钙钛矿色转换膜和第二钙钛矿色转换膜，设置在所述第一钙钛矿色转换膜和第二钙钛矿色转换膜之间的第二水氧阻挡层，以及设置在所述第二钙钛矿色转换膜远离所述衬底基板一侧的第一水氧阻挡层。
在本申请实施例所提供的显示面板中，所述第一水氧阻挡层的材料包括聚甲基丙烯酸甲酯；所述第一水氧阻挡层和所述第二水氧阻挡层的材料相同。
在本申请实施例所提供的显示面板中，所述第一钙钛矿色转换膜与所述第一钙钛矿色转换膜的厚度相同。
本申请实施例还提供了一种显示面板的制作方法，包括以下步骤：
提供衬底基板；
在所述衬底基板上形成像素定义层；所述像素定义层上设有像素开口；
在所述像素开口中依次形成钙钛矿色转换功能层和第一水氧阻挡层，得到色转换层。
在本申请实施例所提供的显示面板的制作方法中，所述在所述像素开口中依次形成钙钛矿色转换功能层和第一水氧阻挡层，包括以下步骤：
采用喷墨打印技术在所述像素开口中形成多层钙钛矿色转换膜，且任意相邻的两层钙钛矿色转换膜之间形成第二水氧阻挡层，以构成钙钛矿色转换功能层；
在钙钛矿色转换功能层上形成第一水氧阻挡层。
在本申请实施例所提供的显示面板的制作方法中，所述第一水氧阻挡层的材料包括聚甲基丙烯酸甲酯。
在本申请实施例所提供的显示面板的制作方法中，所述第一水氧阻挡层和所述第二水氧阻挡层的材料相同。
 有益效果
本申请的有益效果为：本申请中，色转换层中的钙钛矿色转换功能层的材料包括色转换效果较好的钙钛矿材料，由于钙钛矿材料对水分和氧气的耐受性相对较差，在钙钛矿色转换功能层上设置第一水氧阻挡层，可以有效的将钙钛矿色转换功能层密封在像素开口中，避免钙钛矿材料与水分和氧气接触，从而提高了钙钛矿色转换功能层的稳定性，即提高了色转换层的稳定性。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的一种显示面板的部分结构示意图；
图2为本申请实施例提供的另一种显示面板的部分结构示意图；
图3为本申请实施例提供的色转换层的俯视示意图；
图4为图3中A-A’处的截面结构示意图；
图5为图3中A-A’处的另一种截面结构示意图；
图6为图3中A-A’处的另一种截面结构示意图；
图7为本申请实施例提供的显示面板的制作方法的流程示意框图；
图8为本申请实施例提供的一种色转换层的制作方法的结构流程示意图；
图9为本申请实施例提供的另一种色转换层的制作方法的结构流程示意图。
 本发明的实施方式
这里所公开的具体结构和功能细节仅仅是代表性的，并且是用来描述本申请的示例性实施例的目的。但是本申请可以通过许多替换形式来具体实现，并且不应当被解释成仅仅受限于这里所阐述的实施例。
在本申请的描述中，需要理解的是，术语“中心”、“横向”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用来描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。另外，术语“包括”及其任何变形，意图在于覆盖不排他的包含。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
这里所使用的术语仅仅是为了描述具体实施例而不意图限制示例性实施例。除非上下文明确地另有所指，否则这里所使用的单数形式“一个”、“一项”还意图包括复数。还应当理解的是，这里所使用的术语“包括”和/或“包含”规定所陈述的特征、整数、步骤、操作、单元和/或组件的存在，而不排除存在或添加一个或更多其他特征、整数、步骤、操作、单元、组件和/或其组合。
下面结合附图和实施例对本申请作进一步说明。
如图1至图4所示，本申请实施例提供了一种显示面板1，包括衬底基板2以及依次设置在衬底基板2上的像素定义层3和色转换层4；像素定义层3上设有像素开口5，色转换层4位于像素开口5中；色转换层4包括钙钛矿色转换功能层6和第一水氧阻挡层7；第一水氧阻挡层7位于钙钛矿色转换功能层6远离衬底基板2的一侧。其中，钙钛矿色转换功能层6的材料包括钙钛矿材料；第一水氧阻挡层7的材料包括聚甲基丙烯酸甲酯。
具体的，显示面板1还包括与衬底基板2相对设置的TFT（Thin Film Transistor，薄膜晶体管）阵列基板8，以及位于衬底基板2和TFT阵列基板8之间的蓝光OLED器件9，色转换层4位于衬底基板2靠近蓝光OLED器件9的一侧；蓝光OLED器件9包括依次设置在TFT阵列基板8上的阳极、空穴注入层、空穴传输层、蓝光发光层、电子传输层、电子阻挡层和阴极。当然，蓝光OLED器件9还可以替换为白光OLED器件，此处不做限制；蓝光OLED器件9上还设置有封装层（图中未标出）。
本实施例中，色转换层4中的钙钛矿色转换功能层6的材料包括色转换效果较好的钙钛矿材料，由于钙钛矿材料对水分和氧气的耐受性相对较差，在钙钛矿色转换功能层6上设置第一水氧阻挡层7，可以有效的将钙钛矿色转换功能层6密封在像素开口5中，避免钙钛矿材料与水分和氧气接触，从而提高了钙钛矿色转换功能层6的稳定性，即提高了色转换层4的稳定性。
在一实施例中，如图2所示，衬底基板2和像素定义层3之间还可以设置彩色滤光片10；彩色滤光片10包括与像素开口5对应设置的彩色色阻11（例如红色色阻、绿色色阻或蓝色色阻），以及围绕彩色色阻11设置的遮光层12；彩色滤光片10与像素定义层3之间还设有保护层（图中未标出）。本实施例中，彩色滤光片10可以滤掉未被色转换层4转换的部分光源，有利于提高显示面板1的显示效果。
在一实施例中，如图1至图3所示，像素开口5包括呈阵列分布的多个子像素开口13；色转换层4位于多个子像素开口13中； 每个子像素开口13中的钙钛矿色转换功能层6包括红色转换膜14、绿色转换膜15或蓝色转换膜16。其中，红色转换膜14的材料包括CH 3NH 3Pb(Br/I) 3或者CsPb(Br/I) 3，绿色转换膜15的材料包括CH 3NH 3PbBr 3或者CsPbBr 3，蓝色转换膜16的材料包括CH 3NH 3Pb(Br/Cl) 3或者CsPb(Br/Cl) 3；其中，红色转换膜14可以被激发产生红光，绿色转换膜15可以被激发产生绿光，蓝色转换膜16可以被激发产生蓝光。
具体的，如图3所示，多个子像素开口13包括间隔设置的红色子像素开口17、绿色子像素开口18和蓝色子像素开口19；红色转换膜14、绿色转换膜15和蓝色转换膜16分别对应红色子像素开口17、绿色子像素开口18和蓝色子像素开口19设置。
本实施例中，色转换层4可以是单色色转换层4，即色转换层4中的钙钛矿色转换功能层6被激发产生单色光，具体可以是红光、绿光或蓝光；当然，色转换层4还可以是彩色色转换层4，即位于不同子像素开口13的钙钛矿色转换功能层6的材料不同，对应产生的光的颜色也不同；可以根据产品的需求进行选择位于不同像素开口5中的钙钛矿色转换功能层6的材料。
如图5所示，本申请实施例提供了一种显示面板1，与上述实施例不同的在于，钙钛矿色转换功能层6包括多层堆叠设置的钙钛矿色转换膜20，以及设置在任意相邻的两层钙钛矿色转换膜20之间的第二水氧阻挡层21；例如，钙钛矿色转换功能层6包括第一钙钛矿色转换膜22与第二钙钛矿色转换膜23，第二水氧阻挡层21设置在第一钙钛矿色转换膜22与第二钙钛矿色转换膜23之间，第一水氧阻挡层7位于第二钙钛矿色转换膜23上。
具体的，第一水氧阻挡层7和第二水氧阻挡层21的材料相同。
具体的，第一钙钛矿色转换膜22与第一钙钛矿色转换膜23的厚度可以相同，也可以不相同，此处不做限制。
本实施例中，钙钛矿色转换功能层6包括多层堆叠设置的钙钛矿色转换膜20，且任意相邻的两层钙钛矿色转换膜20之间设置了第二水氧阻挡层21，第一水氧阻挡层7和第二水氧阻挡层21的双重保护可以更加有效的将钙钛矿色转换功能层6与水分和氧气隔绝，从而提高了钙钛矿色转换功能层6的稳定性，即提高了色转换层4的稳定性。
在一实施例中，如图3所示，像素开口5包括呈阵列分布的多个子像素开口13；色转换层4位于多个子像素开口13中；每个子像素开口13中的钙钛矿色转换膜20包括红色转换膜14、绿色转换膜15或蓝色转换膜16。具体的，同一个子像素开口13中的每一层钙钛矿色转换膜20的材料相同（发同一个颜色的光）。其中，红色转换膜14的材料包括CH 3NH 3Pb(Br/I) 3或者CsPb(Br/I) 3，绿色转换膜15的材料包括CH 3NH 3PbBr 3或者CsPbBr 3，蓝色转换膜16的材料包括CH 3NH 3Pb(Br/Cl) 3或者CsPb(Br/Cl) 3；其中，红色转换膜14可以被激发产生红光，绿色转换膜15可以被激发产生绿光，蓝色转换膜16可以被激发产生蓝光。
具体的，多个子像素开口13包括间隔设置的红色子像素开口17、绿色子像素开口18和蓝色子像素开口19；红色子像素开口17中的每一层钙钛矿色转换膜20均为红色转换膜14，绿色子像素开口18中的每一层钙钛矿色转换膜20均为绿色转换膜15，蓝色子像素开口19中的每一层钙钛矿色转换膜20均为蓝色转换膜16。
本实施例中，色转换层4可以是单色色转换层4，即色转换层4中的钙钛矿色转换功能层6被激发产生单色光，具体可以是红光、绿光或蓝光；当然，色转换层4还可以是彩色色转换层4，即位于不同子像素开口13的钙钛矿色转换膜20的材料不同，对应产生的光的颜色也不同；可以根据产品的需求进行选择色转换层4的发光颜色类型。
如图6所示，本申请实施例提供了一种显示面板1，与上述实施例不同的在于，第一水氧阻挡层7位于钙钛矿色转换功能层6和像素定义层3上。本实施例中，第一水氧阻挡层7覆盖在钙钛矿色转换功能层6和像素定义层3上，可以避免水分和氧气从第一水氧阻挡层7和像素定义层3的接触界面进入，进一步将将钙钛矿色转换功能层6密封在像素开口5中，避免钙钛矿材料与水分和氧气接触，从而提高了钙钛矿色转换功能层6的稳定性，即提高了色转换层4的稳定性
如图7所示，本申请实施例还提供了一种显示面板的制作方法，包括以下步骤：
S701：提供衬底基板；
S702：在衬底基板上形成像素定义层；像素定义层上设有像素开口；
S703：在像素开口中依次形成钙钛矿色转换功能层和第一水氧阻挡层，得到色转换层。
具体的，步骤S703，包括以下步骤：
采用喷墨打印技术在像素开口5中形成多层钙钛矿色转换膜20，且任意相邻的两层钙钛矿色转换膜20之间形成第二水氧阻挡层21，以构成钙钛矿色转换功能层6；在钙钛矿色转换功能层6上形成第一水氧阻挡层7。
具体的，显示面板1还包括与衬底基板2相对设置的TFT阵列基板8，以及位于衬底基板2和TFT阵列基板8之间的蓝光OLED器件9，色转换层4位于衬底基板2靠近蓝光OLED器件9的一侧；蓝光OLED器件9包括依次设置在TFT阵列基板8上的阳极、空穴注入层、空穴传输层、蓝光发光层、电子传输层、电子阻挡层和阴极。当然，蓝光OLED器件9还可以替换为白光OLED器件，此处不做限制。
本实施例中，采用上述制作方法得到的显示面板1中，色转换层4中的第一水氧阻挡层7可以有效的将钙钛矿色转换功能层6密封在像素开口5中，避免钙钛矿材料与水分和氧气接触，从而提高了钙钛矿色转换功能层6的稳定性，即提高了色转换层4的稳定性。
如图8所示，本申请实施例还提供了一种色转换层4的制作方法，包括以下步骤：
采用喷墨打印技术将目标体积（例如每个子像素开口13中20滴）的钙钛矿墨水打印在像素开口5中，如图8中的a所示；再将打印后的衬底基板2置于VCD（真空干燥器）腔体中，在室温下以一定压强（例如50pa）保压约10分钟，形成一层钙钛矿色转换功能层6，如图8中的b所示；然后在钙钛矿色转换功能层6上喷墨打印一定厚度的聚甲基丙烯酸甲酯（PMMA，透明）高分子墨水，如图8中的c所示；最后，将打印的高分子墨水进行湿膜热固化或UV（紫外）固化，形成第一水氧阻挡层7，则得到色转换层4，如图8中的d所示。
本实施例中，采用上述制作方法得到的色转换层4中，第一水氧阻挡层7可以有效的将钙钛矿色转换功能层6密封在像素开口5中，避免钙钛矿材料与水分和氧气接触，从而提高了钙钛矿色转换功能层6的稳定性，即提高了色转换层4的稳定性。
如图9所示，本申请实施例还提供了一种色转换层4的制作方法，包括以下步骤：
根据钙钛矿色转换功能层6中钙钛矿色转换膜20的层数将目标体积的钙钛矿墨水分多次喷墨打印，以两层钙钛矿色转换膜20为例。若钙钛矿墨水的目标体积为每个子像素开口13中20滴，则第一钙钛矿色转换膜22形成过程中钙钛矿墨水的打印滴数为10滴，再将打印后的衬底基板2置于VCD腔体中，在室温下以一定压强（例如50pa）保压约5分钟，形成第一钙钛矿色转换膜22，如图9中的e和f所示；然后在第一钙钛矿色转换膜22上喷墨打印一定厚度的聚甲基丙烯酸甲酯高分子墨水并将其固化形成第二水氧阻挡层21，如图9中的g和h所示；然后在第二水氧阻挡层21上打印10滴钙钛矿墨水并置于VCD腔体中按照第一钙钛矿色转换膜22干燥的条件处理，形成第一钙钛矿色转换膜23，如图9中的i和j所示；然后在第一钙钛矿色转换膜23上再次喷墨打印一定厚度的聚甲基丙烯酸甲酯高分子墨水并将其固化，形成第一水氧阻挡层7，得到两层钙钛矿色转换膜20-水氧阻挡层交叉结构，即得到色转换层4，如图9中的k和m所示。
本实施例中，采用上述制作方法得到的色转换层4中，第一水氧阻挡层7和第二水氧阻挡层21的双重保护可以有效的将钙钛矿色转换功能层6密封在像素开口5中，避免钙钛矿材料与水分和氧气接触，从而提高了钙钛矿色转换功能层6的稳定性，即提高了色转换层4的稳定性。
综上所述，虽然本申请已以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (16)

  1. 一种显示面板，包括衬底基板以及依次设置在所述衬底基板上的像素定义层和色转换层；所述像素定义层上设有像素开口，所述色转换层位于所述像素开口中；
    所述色转换层包括钙钛矿色转换功能层和第一水氧阻挡层；所述第一水氧阻挡层位于所述钙钛矿色转换功能层远离所述衬底基板的一侧。
  2. 如权利要求1所述的显示面板，其中，所述钙钛矿色转换功能层包括多层堆叠设置的钙钛矿色转换膜，以及设置在任意相邻的两层所述钙钛矿色转换膜之间的第二水氧阻挡层。
  3. 如权利要求1所述的显示面板，其中，所述第一水氧阻挡层的材料包括聚甲基丙烯酸甲酯。
  4. 如权利要求2所述的显示面板，其中，所述第一水氧阻挡层和所述第二水氧阻挡层的材料相同。
  5. 如权利要求1所述的显示面板，其中，所述第一水氧阻挡层位于所述钙钛矿色转换功能层和所述像素定义层上。
  6. 如权利要求2所述的显示面板，其中，所述像素开口包括呈阵列分布的多个子像素开口；所述色转换层位于所述多个子像素开口中；
    每个子像素开口中的钙钛矿色转换膜包括红色转换膜、绿色转换膜或蓝色转换膜。
  7. 如权利要求6所述的显示面板，其中，所述红色转换膜的材料包括CH 3NH 3Pb(Br/I) 3或者CsPb(Br/I) 3，所述绿色转换膜的材料包括CH 3NH 3PbBr 3或者CsPbBr 3，所述蓝色转换膜的材料包括CH 3NH 3Pb(Br/Cl) 3或者CsPb(Br/Cl) 3。
  8. 如权利要求1所述的显示面板，其中，所述显示面板还包括与所述衬底基板相对设置的TFT阵列基板，以及位于所述衬底基板和所述TFT阵列基板之间的蓝光OLED器件，所述色转换层位于所述衬底基板靠近所述蓝光OLED器件的一侧。
  9. 如权利要求1所述的显示面板，其中，所述衬底基板和所述像素定义层之间还设有彩色滤光片；所述彩色滤光片包括与所述像素开口对应设置的彩色色阻，以及围绕所述彩色色阻设置的遮光层。
  10. 一种显示面板，包括衬底基板以及依次设置在所述衬底基板上的像素定义层和色转换层；所述像素定义层上设有像素开口，所述色转换层位于所述像素开口中；
    所述色转换层包括堆叠设置的第一钙钛矿色转换膜和第二钙钛矿色转换膜，设置在所述第一钙钛矿色转换膜和第二钙钛矿色转换膜之间的第二水氧阻挡层，以及设置在所述第二钙钛矿色转换膜远离所述衬底基板一侧的第一水氧阻挡层。
  11. 如权利要求10所述的显示面板，其中，所述第一水氧阻挡层的材料包括聚甲基丙烯酸甲酯；所述第一水氧阻挡层和所述第二水氧阻挡层的材料相同。
  12. 如权利要求10所述的显示面板，其中，所述第一钙钛矿色转换膜与所述第一钙钛矿色转换膜的厚度相同。
  13. 一种显示面板的制作方法，包括以下步骤：
    提供衬底基板；
    在所述衬底基板上形成像素定义层；所述像素定义层上设有像素开口；
    在所述像素开口中依次形成钙钛矿色转换功能层和第一水氧阻挡层，得到色转换层。
  14. 如权利要求13所述的显示面板的制作方法，其中，所述在所述像素开口中依次形成钙钛矿色转换功能层和第一水氧阻挡层，包括以下步骤：
    采用喷墨打印技术在所述像素开口中形成多层钙钛矿色转换膜，且任意相邻的两层钙钛矿色转换膜之间形成第二水氧阻挡层，以构成钙钛矿色转换功能层；
    在钙钛矿色转换功能层上形成第一水氧阻挡层。
  15. 如权利要求13所述的显示面板的制作方法，其中，所述第一水氧阻挡层的材料包括聚甲基丙烯酸甲酯。
  16. 如权利要求14所述的显示面板的制作方法，其中，所述第一水氧阻挡层和所述第二水氧阻挡层的材料相同。
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CN106526962A (zh) * 2016-11-28 2017-03-22 纳晶科技股份有限公司 光转换膜片、其制备方法及显示设备
CN107674500A (zh) * 2017-11-17 2018-02-09 张家港海纳至精新材料科技有限公司 一种油墨及其制备方法
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CN109004095A (zh) * 2018-07-25 2018-12-14 京东方科技集团股份有限公司 一种彩膜基板及woled显示装置
CN109378394A (zh) * 2018-10-09 2019-02-22 青岛海信电器股份有限公司 一种量子点彩色滤光片基板及其制备方法和显示装置
CN109387896A (zh) * 2018-11-07 2019-02-26 福州大学 一种基于局域表面等离子体共振的量子点彩色滤光膜
CN111257983A (zh) * 2018-12-03 2020-06-09 中华映管股份有限公司 彩色滤光片及其制造方法
CN109979960A (zh) * 2019-04-26 2019-07-05 中国科学院长春光学精密机械与物理研究所 基于量子点光转换层的全彩Micro-LED显示器件的制作方法
CN110441956A (zh) * 2019-08-20 2019-11-12 苏州星烁纳米科技有限公司 量子点彩膜及显示装置

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