Quantum dot material, preparation method thereof, quantum dot light-emitting device and display device

A quantum dot material and quantum dot light-emitting technology, which are applied in display devices, quantum dot light-emitting devices, quantum dot materials and their preparation fields, can solve the problems of increasing surface defects of quantum dots, decreasing quantum yield, and falling off ligands, etc. The effect of improving quantum dot yield, reducing defects, and increasing yield

Pending Publication Date: 2020-02-25
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the weak binding force between the coordination end of the ligand and the quantum dot, the ligand is easy to fall off, resulting in more defects on the surface of the quantum dot, resulting in a significant decrease in quantum yield.
[0004] In summary, the quantum dot material ligands in the quantum dot light

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  • Quantum dot material, preparation method thereof, quantum dot light-emitting device and display device
  • Quantum dot material, preparation method thereof, quantum dot light-emitting device and display device
  • Quantum dot material, preparation method thereof, quantum dot light-emitting device and display device

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Embodiment Construction

[0038] The embodiment of the present application provides a quantum dot material, such as figure 1 As shown, the quantum dot material includes: a quantum dot 1, and a plurality of ligands 2 coordinated with the quantum dot 1; couplet. It should be noted, figure 1 Cross-links between ligands are indicated by dotted lines.

[0039] In the quantum dot material provided in the embodiment of the present application, the adjacent ligands on a quantum dot are cross-linked with each other, and the cross-linked ligand is equivalent to forming a dense protective layer on the surface of the quantum dot to protect the ligand from the quantum dot. The surface falls off, thereby reducing the defects on the surface of quantum dots and improving the yield of quantum dots.

[0040] Optionally, as in figure 2 As shown, the ligand includes: a first coordinating group R1 connected in coordination with the quantum dot, and a cross-linking group R2 connected to the first coordinating group; th...

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Abstract

The invention discloses a quantum dot material, a preparation method thereof, a quantum dot light-emitting device and a display device. Ligands are prevented from falling off from the surfaces of quantum dots to increase the yield of the quantum dots. The quantum dot material provided by the embodiment of the invention comprises quantum dots and a plurality of ligands coordinated with the quantumdots; and the adjacent ligands coordinated with one quantum dot are cross-linked with each other.

Description

technical field [0001] The present application relates to the field of display technology, in particular to a quantum dot material and a preparation method thereof, a quantum dot light-emitting device, and a display device. Background technique [0002] Quantum dot light-emitting diode (QLED) display device is an electroluminescent device. Driven by an external electric field, holes and electrons overcome interface barriers and enter the valence band energy of the quantum dot light-emitting layer respectively. Level and conduction band energy level, when returning from the excited state to the stable ground state, photons are released. With the development of quantum dot materials, the continuous optimization of device structures, and the continuous deepening of research on effective charge transport, QLED display devices will surpass photoluminescent quantum dot brightness enhancement films and quantum dot color filters, and are expected to become the next generation mains...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/88H01L33/50
CPCC09K11/883C09K11/025H01L33/502H01L2933/0041
Inventor 王好伟张振琦
Owner BOE TECH GRP CO LTD
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