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JP-2026514318-A - Initiator, quantum dot light-emitting layer and method for manufacturing the same, light-emitting device, display device

JP2026514318AJP 2026514318 AJP2026514318 AJP 2026514318AJP-2026514318-A

Abstract

The present invention provides an initiator, a quantum dot, a quantum dot light-emitting layer, a light-emitting device, a display device, and a method for manufacturing a quantum dot light-emitting layer. The structural formula of the initiator is R11 to R15 are any of H, a group containing N and H, an ester group, and an alkyl group; R21 to R24 are any of H, F, S, O, an ester group, an alkyl group, and a group containing N and H; R3 is any of S, O, an ester group, an amide group, an alkyl group, H, and F; R4 is any of an ester group, an alkyl group, and a group containing N and H; R31 to R39 may or may not be present, and if at least one of R31 to R39 is present, it is one selected from an ester group, an alkyl group, and a group containing N and H; n is a positive integer of 1 or more; the initiator group includes at least one of S, O, and a group containing N and H; and the initiator group refers to any group other than the benzophenone skeleton.

Inventors

  • 方 兵
  • ▲盧▼ 少勇
  • ▲陳▼ 卓
  • ▲張▼ 宜▲馳▼

Assignees

  • 京東方科技集團股▲ふん▼有限公司
  • 北京京▲東▼方技▲術▼▲開▼▲発▼有限公司

Dates

Publication Date
20260511
Application Date
20230808
Priority Date
20230323

Claims (20)

  1. It is an initiator, and its structural formula is And, R11, R12, R13, R14, and R15 are either the same or different from each other, and each of R11, R12, R13, R14, and R15 is selected from a hydrogen atom, a group containing a nitrogen atom and a hydrogen atom, an ester group, and an alkyl group; R21, R22, R23, and R24 are either the same or different from each other, and each of R21, R22, R23, and R24 is selected from a hydrogen atom, a fluorine atom, a sulfur atom, an oxygen atom, an ester group, an alkyl group, and a group containing a nitrogen atom and a hydrogen atom; R3 is selected from a sulfur atom, an oxygen atom, an ester group, an amide group, an alkyl group, a hydrogen atom, and a fluorine atom; and R4 is an ester A group selected from a group, an alkyl group, and a group comprising a nitrogen atom and a hydrogen atom, wherein R31, R32, R33, R34, R35, R36, R37, R38, and R39 may or may not be present and may or may be the same as or different from each other, and if at least one of R31, R32, R33, R34, R35, R36, R37, R38, and R39 is present, it may or may not be an ester group, an alkyl group, and a group comprising a nitrogen atom and a hydrogen atom, where n is a positive integer of 1 or more, and the initiator group comprises at least one of the sulfur atom, the oxygen atom, and the group comprising a nitrogen atom and a hydrogen atom, and the initiator group refers to an initiator other than the benzophenone skeleton.
  2. The initiator according to claim 1, wherein R31, R32, R33, R34, R35, R36, R37, R38, and R39 are all absent; R11, R12, R13, R14, and R15 are each selected from a hydrogen atom or a group containing a nitrogen atom and a hydrogen atom; R21, R22, R23, and R24 are each selected from a hydrogen atom or a fluorine atom; and R3 is one of the following selected from a sulfur atom, an oxygen atom, an ester group, an amide group, and an alkyl group.
  3. The initiator according to claim 1, wherein the group containing the nitrogen atom and hydrogen atom is a pyrrole group or a tertiary amine group.
  4. The structural formula of the initiator is The initiator according to claim 1.
  5. n=3, the structural formula of the initiator is is, or, n=2, the structural formula of the initiator is is, or, n=4, the structural formula of the initiator is is, or, n=1, the structural formula of the initiator is The initiator according to claim 4.
  6. The structural formula of the initiator is The initiator according to claim 1, wherein x and y are both positive integers of 1 or more.
  7. The initiator according to claim 6, wherein the number of carbon atoms in the branched chain bonded to the nitrogen atom is 2 to 30.
  8. An initiator which is a mixture of benzophenone and an amine compound, or a mixture of a benzophenone derivative and an amine compound, The structural formula of the aforementioned benzophenone derivative is The initiator is such that R0 is one of the following selected from O, S, C6H5 , OH, Br, Cl, and I, and m is a positive integer greater than or equal to 0.
  9. The initiator according to claim 8, wherein the amine compound is pyrrole or a tertiary amine.
  10. A quantum dot having a ligand on its surface, wherein the structural formula of the ligand is A quantum dot wherein R5 is coordinately bonded to the surface of the quantum dot and is selected from a mercapto group, a carboxyl group, or an amino group, R6 is selected from an ester group or an ether group, and R7 is selected from an ester group or an ether group, and the ligand is configured to photosensitize with the initiator described in any one of claims 1 to 7 or any one of claims 8 to 9 under light irradiation.
  11. The structural formula of the ligand is The quantum dot according to claim 10.
  12. A quantum dot light-emitting layer comprising a plurality of quantum dots, wherein at least some of the plurality of quantum dots have ligands on their surfaces, and the quantum dot light-emitting layer is formed by crosslinking the ligand-containing quantum dots with an initiator according to any one of claims 1 to 7 or any one of claims 8 to 9.
  13. The structural formula of the ligand is The structural formula of the initiator is The structural formula of the quantum dot light-emitting layer is is, or, The structural formula of the ligand is The structural formula of the initiator is The structural formula of the quantum dot light-emitting layer is is, or, The structural formula of the ligand is The structural formula of the initiator is The structural formula of the quantum dot light-emitting layer is And, The quantum dot light-emitting layer according to claim 12, wherein QD represents a quantum dot and k is a positive integer of 1 or more.
  14. The structural formula of the ligand is The initiator is a mixture of benzophenone and an amine compound, and the structural formula of the quantum dot light-emitting layer is is, or, The structural formula of the ligand is The initiator is a mixture of a benzophenone derivative and an amine compound, and the structural formula of the benzophenone derivative is The structural formula of the quantum dot light-emitting layer is And, The quantum dot light-emitting layer according to claim 12, wherein R5 is selected from a mercapto group, a carboxyl group, or an amino group; R6 is selected from an ester group or an ether group; R7 is selected from an ester group or an ether group; R0 is selected from O, S, C6H5 , OH, Br, Cl, or I; QD represents a quantum dot; k is a positive integer of 1 or more; and m is a positive integer of 0 or more.
  15. The quantum dot light-emitting layer according to any one of claims 12 to 14, wherein the quantum dot light-emitting layer comprises a plurality of first quantum dot patterns, a plurality of second quantum dot patterns, and a plurality of third quantum dot patterns, wherein the first quantum dot patterns are configured to emit red light, the second quantum dot patterns are configured to emit green light, and the third quantum dot patterns are configured to emit blue light.
  16. A light-emitting device, The first electrode layer and A hole injection layer located on the first electrode layer, A hole transport layer located on the side of the hole injection layer away from the first electrode layer, A quantum dot light-emitting layer according to any one of claims 12 to 15, located on the side of the hole transport layer away from the first electrode layer, An electron transport layer located on the side of the quantum dot light-emitting layer away from the first electrode layer, A light-emitting device including a second electrode layer located on the side of the electron transport layer away from the first electrode layer.
  17. A display device comprising a plurality of light-emitting devices according to claim 16, wherein at least two of the plurality of light-emitting devices are configured to emit light of different colors.
  18. A method for manufacturing a patterned quantum dot light-emitting layer, The steps include providing a substrate and A step of coating a mixed solution onto the substrate, wherein the mixed solution comprises quantum dots and an initiator, the surface of the quantum dots has a ligand containing a carbon-carbon double bond, and the initiator is the initiator according to any one of claims 1 to 7 or any one of claims 8 to 9, A method for producing a patterned quantum dot light-emitting layer, comprising the step of initiating a polymerization reaction of the carbon-carbon double bond of the ligand under light irradiation to form a patterned quantum dot light-emitting layer.
  19. The process further includes the step of curing the mixed solution applied to the substrate to form an intermediate film layer, The step of initiating a polymerization reaction of the carbon-carbon double bond of the ligand under light irradiation to form a patterned quantum dot light-emitting layer is as follows: The process involves using a mask plate to expose the intermediate film layer, passing ultraviolet light through the mask plate to expose the intermediate film layer, and under ultraviolet light irradiation, the initiator initiates the polymerization reaction of the carbon-carbon double bond of the ligand. The method according to claim 18, comprising the steps of developing the intermediate film layer after the polymerization reaction using a developer, dissolving the unexposed portion of the intermediate film layer with the developer to form the patterned quantum dot light-emitting layer.
  20. The method according to claim 18 or 19, wherein the concentration of the quantum dots in the mixed solution is approximately 25 to 30 mg/mL, and the concentration of the initiator in the mixed solution is approximately 0.1 to 1.0 mg/mL.

Description

This application claims priority to PCT International Application No. PCT/CN2023/083509, filed on 23 March 2023, the entirety of which is incorporated herein by reference. This disclosure relates to the technology of displays, and more particularly to initiators, quantum dots, quantum dot emissive layers, light-emitting devices, display devices, and methods for manufacturing patterned quantum dot emissive layers. Light-emitting diodes (LEDs) achieve light emission by recombining electrons and holes to release energy. Light-emitting diodes include, but are not limited to, organic light-emitting diodes (OLEDs) and quantum dot light-emitting diodes (QLEDs). Quantum dots are a type of semiconductor nanomaterial capable of binding excitons in three-dimensional space. They possess excellent properties such as high quantum efficiency, a narrow excitation spectrum, high photostability, a long fluorescence lifetime, and good solution processing compatibility, making them highly applicable to high-quality displays. Quantum dot light-emitting diodes are devices that use quantum dots as the light-emitting material, offering superior advantages over organic light-emitting diodes, including lower power consumption, higher color purity, and a wider color gamut. Therefore, quantum dot light emission technology represents the most promising next-generation self-luminous display technology. According to one aspect of this disclosure, an initiator is provided, the structural formula of which is R11, R12, R13, R14, and R15 are either the same or different from each other, and each of R11, R12, R13, R14, and R15 is selected from a hydrogen atom, a group containing a nitrogen atom and a hydrogen atom, an ester group, and an alkyl group; R21, R22, R23, and R24 are either the same or different from each other, and each of R21, R22, R23, and R24 is selected from a hydrogen atom, a fluorine atom, a sulfur atom, an oxygen atom, an ester group, an alkyl group, and a group containing a nitrogen atom and a hydrogen atom; R3 is selected from a sulfur atom, an oxygen atom, an ester group, an amide group, an alkyl group, a hydrogen atom, and a fluorine atom; and R4 is E The initiator group is one selected from a ster group, an alkyl group, and a group comprising a nitrogen atom and a hydrogen atom, and R31, R32, R33, R34, R35, R36, R37, R38, and R39 may or may not be present and may or may not be the same as one another, and if at least one of R31, R32, R33, R34, R35, R36, R37, R38, and R39 is present, it is one selected from an ester group, an alkyl group, and a group comprising a nitrogen atom and a hydrogen atom, n is a positive integer of 1 or more, and the initiator group comprises at least one of the sulfur atom, the oxygen atom, and the group comprising a nitrogen atom and a hydrogen atom, and the initiator group refers to any group other than the benzophenone skeleton. In some embodiments, R31, R32, R33, R34, R35, R36, R37, R38, and R39 are all absent; R11, R12, R13, R14, and R15 are each selected from a hydrogen atom or a group containing a nitrogen atom and a hydrogen atom; R21, R22, R23, and R24 are each selected from a hydrogen atom or a fluorine atom; and R3 is one of the following selected from a sulfur atom, an oxygen atom, an ester group, an amide group, and an alkyl group. In some examples, the group containing the nitrogen and hydrogen atoms is a pyrrole group or a tertiary amine group. In some embodiments, the structural formula of the initiator is That is the case. In some embodiments, n=3, and the structural formula of the initiator is And, or, n=2, the structural formula of the initiator is And, or, n=4, the structural formula of the initiator is And, or, n=1, the structural formula of the initiator is That is the case. In some embodiments, the structural formula of the initiator is And x and y are both positive integers greater than or equal to 1. In some examples, the number of carbon atoms in the branched chain bonded to the nitrogen atom ranges from 2 to 30. According to other aspects of this disclosure, an initiator is provided, which is a mixture of benzophenone and an amine compound or a mixture of a benzophenone derivative and an amine compound, wherein the structural formula of the benzophenone derivative is R0 is one of the following selected from O, S, C6H5 , OH, Br, Cl, and I, and m is a positive integer greater than or equal to 0. In some examples, the amine compound is pyrrole or a tertiary amine. According to another aspect of this disclosure, a quantum dot is provided, the quantum dot having a ligand on its surface, the structural formula of the ligand is R5 is coordinately bonded to the surface of the quantum dot and is selected from a mercapto group, a carboxyl group, or an amino group, R6 is selected from an ester group or an ether group, and R7 is selected from an ester group or an ether group, and the ligand is configured to photosensitize with an initiator described in any of the above e