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CN-122028617-A - Display panel, preparation method thereof and display device

CN122028617ACN 122028617 ACN122028617 ACN 122028617ACN-122028617-A

Abstract

The application discloses a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, a light-emitting functional layer and a color conversion structure layer, wherein the light-emitting functional layer comprises a plurality of light-emitting units with the same light-emitting color, the color conversion structure layer is arranged on one side, away from the substrate, of the light-emitting functional layer, the color conversion structure layer comprises a plurality of quantum dot units, each quantum dot unit comprises quantum dot particles, orthographic projection of each quantum dot unit on the substrate and orthographic projection of each light-emitting unit on the substrate are at least partially overlapped, and the solidifying temperature of raw materials of the color conversion structure layer is less than or equal to preset temperature. The application improves the product performance and manufacturability of the quantum dot display panel.

Inventors

  • CUI RONGZHEN

Assignees

  • 昆山国显光电有限公司

Dates

Publication Date
20260512
Application Date
20241112

Claims (20)

  1. 1. A display panel, comprising: A substrate; a light-emitting functional layer including a plurality of light-emitting units having the same light-emitting color; The color conversion structure layer is arranged on one side, away from the substrate, of the light-emitting functional layer, the color conversion structure layer comprises a plurality of quantum dot units, each quantum dot unit comprises quantum dot particles, orthographic projection of the quantum dot unit on the substrate and orthographic projection of the light-emitting unit on the substrate are at least partially overlapped, and solidification temperature of raw materials of the color conversion structure layer is smaller than or equal to preset temperature.
  2. 2. The display panel of claim 1, wherein the preset temperature is less than or equal to 120 ℃; Preferably, the preset temperature is 85 ℃.
  3. 3. The display panel according to claim 1, wherein the raw materials of the quantum dot unit comprise resin, monomer, initiator and quantum dot, wherein the material of the quantum dot comprises any one or more of CdS, cdO, cdSe, cdTe, znS, znSe, znTe, mnS, mnO, mnSe, lnP, lnAs, lnSb; Preferably, the material of the resin comprises any one or more of epoxy resin, acrylic ester, epoxy acrylic ester and methacrylic acid copolymer; preferably, the epoxy acrylic resin comprises one or more of free bisphenol A glycerol diacrylate, bisphenol A glycerol dimethacrylate and bisphenol A ethoxylated dimethacrylate; preferably, the material of the monomer comprises one or more of trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, tripropylene glycol diacrylate, triethylene glycol diacrylate, pentaerythritol triacrylate, diethylene glycol dimethacrylate, amidediate, secondary amine dienoate and secondary amine acrylate; Preferably, the initiator macro material comprises one or more of alpha hydroxy ketone derivatives, amino ketone derivatives, acyl phosphine derivatives and benzophenone derivatives; Preferably, the raw material of the quantum dot unit further comprises a scattering component, wherein the scattering component comprises one or more of silicon, silicon dioxide, aluminum oxide, titanium dioxide, zirconium oxide, barium sulfate, zinc oxide, polymethyl methacrylate and benzoguanamine polymers.
  4. 4. The display panel of claim 1, wherein the color conversion structure layer further comprises a bank having a plurality of second openings, the quantum dot units being located within the corresponding second openings; Preferably, the material of the dam comprises any one of acrylic acid and epoxy resin; preferably, the solidification temperature of the raw materials of the dykes is less than or equal to the preset temperature; Preferably, the height of the bank is greater than the height of the quantum dot unit in a direction perpendicular to the substrate; preferably, the tip end surface of the quantum dot unit is flush with the tip end surface of the bank.
  5. 5. The display panel according to claim 1, further comprising an encapsulation layer disposed on a side of the light-emitting functional layer facing away from the substrate, the encapsulation layer comprising a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer disposed in that order in a direction away from the substrate, the color conversion structure layer being disposed on a side of the second inorganic encapsulation layer facing away from the substrate; preferably, the display panel further includes a third inorganic encapsulation layer, and the third inorganic encapsulation layer is disposed on a side of the color conversion structure layer away from the substrate; Preferably, the curing temperature of the raw material of the encapsulation layer is less than or equal to the preset temperature.
  6. 6. The display panel of claim 1, further comprising an encapsulation layer disposed on a side of the light-emitting functional layer facing away from the substrate, the encapsulation layer comprising a first inorganic encapsulation layer disposed between the light-emitting functional layer and the color conversion structure layer; Preferably, the display panel further includes a second inorganic encapsulation layer disposed on a side of the color conversion structure layer facing away from the substrate; Preferably, the curing temperature of the raw material of the encapsulation layer is less than or equal to the preset temperature.
  7. 7. The display panel of claim 1, further comprising a filter layer disposed on a side of the color conversion structure layer facing away from the substrate; Preferably, the curing temperature of the filter layer is less than or equal to a preset temperature; Preferably, the material of the filter layer includes any one of acrylic and epoxy.
  8. 8. The display panel according to claim 7, wherein the light emitting unit emits blue light, the quantum dot unit comprises a red quantum dot unit and a green quantum dot unit, the filter layer comprises a plurality of first yellow filter portions, and the plurality of first yellow filter portions are respectively arranged on one side of the red quantum dot unit and/or the green quantum dot unit, which is away from the substrate.
  9. 9. The display panel of claim 8, wherein the color conversion structure layer further comprises a filling portion disposed on the encapsulation layer, the front projection of the filling portion on the substrate at least partially overlapping with the front projection of a portion of the light emitting unit on the substrate; preferably, the filter layer includes a first blue filter portion disposed at a side of the filling portion facing away from the substrate; preferably, the curing temperature of the filling part is less than or equal to a preset temperature.
  10. 10. The display panel of claim 7, wherein the filter layer further comprises a grid-like light shielding structure disposed on a side of the dam away from the substrate, the light shielding structure being provided with a plurality of light-transmitting openings, at least a portion of the filter layer being located in the light-transmitting openings.
  11. 11. The display panel according to claim 10, wherein the light shielding structure includes a second yellow filter portion provided in a same layer as the first yellow filter portion and a second blue filter portion provided in a same layer as the first blue filter portion.
  12. 12. The display panel according to claim 7, wherein the light emitting unit emits blue light, the quantum dot unit includes a red quantum dot unit and a green quantum dot unit, the filter layer includes a red filter portion and a green filter portion, the red filter portion is disposed at a side of the red quantum dot unit facing away from the substrate, and the green filter portion is disposed at a side of the green quantum dot unit facing away from the substrate; Preferably, the color conversion structure layer further comprises a filling part arranged on the packaging layer, wherein the orthographic projection of the filling part on the substrate and the orthographic projection of part of the light emitting unit on the substrate are at least partially overlapped; preferably, the optical filter layer further comprises a black matrix, the black matrix is arranged on one side of the dam, which faces away from the substrate, the black matrix is provided with a plurality of light-transmitting openings, and at least part of the optical filter layer is positioned in the light-transmitting openings; preferably, the curing temperature of the black matrix is less than or equal to a preset temperature.
  13. 13. The display panel according to claim 1, wherein the light-emitting unit includes a first electrode, a light-emitting layer, and a second electrode sequentially disposed in a direction away from the substrate, the light-emitting layer being a three-layered light-emitting structure; Preferably, the light emitting layer includes a first hole layer, a first light emitting sub-layer, a first electron layer, a second hole layer, a second light emitting sub-layer, a second electron layer, a third hole layer, a third light emitting sub-layer, and a third electron layer sequentially arranged; Preferably, the light emitting unit further includes a first charge generation layer disposed between the first electron layer and the second hole layer, and a second charge generation layer disposed between the second electron layer and the third hole layer.
  14. 14. The display panel according to claim 1, further comprising a pixel defining layer provided with a pixel opening, the light emitting unit being located within the pixel opening; Preferably, the pixel defining layer comprises an inorganic material.
  15. 15. The display panel of claim 14, further comprising an isolation structure disposed on the substrate, the isolation structure being located on a side of the pixel defining layer facing away from the substrate, the isolation structure having a first opening, the light emitting unit being located within the first opening; preferably, the isolation structure comprises a supporting layer and a shielding layer which are sequentially arranged along a direction far away from the substrate, the orthographic projection of the supporting layer on the substrate is positioned in the orthographic projection range of the shielding layer on the substrate, and the projection area of the supporting layer on the substrate is smaller than the projection area of the shielding layer on the substrate; Preferably, the supporting layer comprises a conductive material, the light emitting unit comprises a first electrode, a light emitting layer and a second electrode which are sequentially arranged along a direction away from the substrate, and the second electrode is electrically connected with the supporting layer; preferably, the bottom ends of the quantum dot units are embedded in the first openings.
  16. 16. A display panel, comprising: A substrate; An isolation structure disposed on the substrate, the isolation structure having a first opening; The light-emitting functional layer comprises a plurality of light-emitting units which are separated by the isolation structure and have the same light-emitting color, and the light-emitting units are positioned in the first opening; The color conversion structure layer is arranged on one side, away from the substrate, of the light-emitting functional layer, the color conversion structure layer comprises a plurality of quantum dot units, the quantum dot units comprise quantum dot particles, the orthographic projection of the quantum dot units on the substrate and the orthographic projection of the light-emitting units on the substrate are at least partially overlapped, and the bottom ends of the quantum dot units are embedded into the first opening; The packaging layer comprises a first inorganic packaging layer and a second inorganic packaging layer, the first inorganic packaging layer is arranged between the light-emitting functional layer and the color conversion structure layer, and the second inorganic packaging layer is arranged on one side, away from the substrate, of the color conversion structure layer.
  17. 17. The display panel according to claim 16, wherein a curing temperature of a raw material of the color conversion structure layer is less than or equal to a preset temperature; preferably, the curing temperature of the raw material of the encapsulation layer is less than or equal to a preset temperature.
  18. 18. A method for manufacturing a display panel, comprising the steps of: Providing a substrate; Preparing a light emitting functional layer including a plurality of light emitting units on the substrate; Preparing an encapsulation layer on the light-emitting functional layer under the condition of being less than or equal to a preset temperature; and preparing a plurality of quantum dot units on the packaging layer under the condition of being less than or equal to a preset temperature, wherein the quantum dot units comprise quantum dot particles, and the orthographic projection of the quantum dot units on the substrate and the orthographic projection of the light emitting units on the substrate at least partially overlap.
  19. 19. The method of preparing of claim 18, further comprising, after the step of preparing the plurality of quantum dot units on the encapsulation layer: under the condition that the temperature is less than or equal to the preset temperature, a yellow light filtering sub-layer and a blue light filtering sub-layer are prepared on the packaging layer, a plurality of first light transmission openings are formed in the yellow light filtering sub-layer, a plurality of second light transmission openings are formed in the blue light filtering sub-layer, the first light transmission openings correspond to the filling parts, part of the second light transmission openings correspond to the red quantum dot units, and part of the second light transmission openings correspond to the green quantum dot units.
  20. 20. The method of preparing of claim 18, further comprising, after the step of preparing the plurality of quantum dot units on the encapsulation layer: Preparing a black matrix on the packaging layer under the condition that the temperature is less than or equal to the preset temperature, wherein the black matrix is provided with a plurality of first light transmission openings and a plurality of second light transmission openings, the first light transmission openings correspond to the filling parts, part of the second light transmission openings correspond to the red quantum dot units, and part of the second light transmission openings correspond to the green quantum dot units; Preparing a first yellow light filtering part and a first blue light filtering part under the condition of being less than or equal to the preset temperature, wherein at least part of the first blue light filtering part is positioned in the first light transmission opening, and at least part of the first yellow light filtering part is positioned in the second light transmission opening.

Description

Display panel, preparation method thereof and display device Technical Field The application belongs to the technical field of display, and particularly relates to a display panel, a preparation method thereof and a display device. Background Compared with the current mainstream Organic Light-emitting display device (EMITTING DISPLAY, OLED), the quantum dot Organic Light-emitting display device (Quantum Dot Organic Light-EMITTING DISPLAY) has wider picture color gamut, higher brightness and lower power consumption, and gradually enters the consumption field of people. The product performance and manufacturability of the current quantum dot display panel need to be improved. Disclosure of Invention The application aims to provide a display panel, a preparation method thereof and a display device, and aims to improve the product performance and manufacturability of a quantum dot display panel. The first aspect of the application provides a display panel, which comprises a substrate, a light-emitting functional layer and a color conversion structure layer, wherein the light-emitting functional layer comprises a plurality of light-emitting units with the same light-emitting color, the color conversion structure layer is arranged on one side of the light-emitting functional layer, which is far away from the substrate, the color conversion structure layer comprises a plurality of quantum dot units, the quantum dot units comprise quantum dot particles, the orthographic projection of the quantum dot units on the substrate and the orthographic projection of the light-emitting units on the substrate are at least partially overlapped, and the curing temperature of raw materials of the color conversion structure layer is less than or equal to a preset temperature. In some embodiments, the preset temperature is less than or equal to 120 ℃; Preferably, the preset temperature is 85 ℃. In some embodiments, the color conversion structure layer further comprises a dam having a plurality of second openings, the quantum dot units being located within the corresponding second openings; preferably, the material of the dam comprises any one of acrylic acid and epoxy resin; Preferably, the curing temperature of the raw materials of the dykes is less than or equal to a preset temperature; Preferably, the height of the bank is greater than the height of the quantum dot unit in a direction perpendicular to the substrate; preferably, the top end face of the quantum dot unit is flush with the top end face of the bank. In some embodiments, the raw materials of the quantum dot unit comprise resin, monomer, initiator and quantum dot, wherein the material of the quantum dot comprises one or more of CdS, cdO, cdSe, cdTe, znS, znSe, znTe, mnS, mnO, mnSe, lnP, lnAs, lnSb; Preferably, the material of the resin comprises any one or more of epoxy resin, acrylic ester, epoxy acrylic ester and methacrylic acid copolymer; Preferably, the epoxy acrylic resin comprises one or more of free bisphenol A glycerol diacrylate, bisphenol A glycerol dimethacrylate and bisphenol A ethoxylated dimethacrylate; Preferably, the monomer material comprises one or more of trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, tripropylene glycol diacrylate, triethylene glycol diacrylate, pentaerythritol triacrylate, diethylene glycol dimethacrylate, amide dienoate, secondary amine dienoate and secondary amine acrylate; Preferably, the initiator macro material comprises one or more of alpha hydroxy ketone derivatives, amino ketone derivatives, acyl phosphine derivatives and benzophenone derivatives; Preferably, the raw material of the quantum dot unit further comprises a scattering component, wherein the scattering component comprises one or more of silicon, silicon dioxide, aluminum oxide, titanium dioxide, zirconium oxide, barium sulfate, zinc oxide, polymethyl methacrylate and benzoguanamine polymers. In some embodiments, the display panel further comprises an encapsulation layer, wherein the encapsulation layer is arranged on one side of the light-emitting functional layer, which is away from the substrate, and the encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer which are sequentially arranged along the direction away from the substrate, and the color conversion structure layer is arranged on one side of the second inorganic encapsulation layer, which is away from the substrate; Preferably, the display panel further comprises a third inorganic encapsulation layer, and the third inorganic encapsulation layer is arranged on one side of the color conversion structure layer, which is away from the substrate; Preferably, the curing temperature of the raw material of the encapsulation layer is less than or equal to a preset temperature. In some embodiments, the display panel further comprises an encapsulation layer disposed on a side of the light-emitting functio