Title:
QUANTUM DOT SCREENING METHOD AND QUANTUM DOT LIGHT-EMITTING DIODE
Document Type and Number:
WIPO Patent Application WO/2022/143435
Kind Code:
A1
Abstract:
Disclosed in the present disclosure are a quantum dot screening method and a quantum dot light-emitting diode. The screening method comprises the following steps: dispersing initial quantum dots with the surfaces connected to an organic ligand in a first solvent to obtain an initial quantum dot solution; and gradually adding a non-soluble solvent into the initial quantum dot solution and mixing, gradually precipitating the initial quantum dots according to the descending order of the particle size, and sequentially collecting the precipitates according to a time order in stages so as to obtain screened quantum dots, wherein the non-soluble solvent is miscible with the first solvent, and is not miscible with the organic ligand. The minimum size deviation of the quantum dots obtained by means of separation in the present disclosure can be controlled within 5%, thereby obtaining a quantum dot material with uniform size; and using the quantum dots with uniform size as a quantum dot light-emitting layer material can effectively improve the photoelectric properties of a quantum dot light-emitting diode.
Inventors:
ZHOU LIKUAN (CN)
YANG YIXING (CN)
YANG YIXING (CN)
Application Number:
PCT/CN2021/141020
Publication Date:
July 07, 2022
Filing Date:
December 24, 2021
Export Citation:
Assignee:
TCL TECH GROUP CORP (CN)
International Classes:
C09K11/88
Foreign References:
| CN109280548A | 2019-01-29 | |||
| CN109020851A | 2018-12-18 | |||
| CN109233801A | 2019-01-18 | |||
| CN109665979A | 2019-04-23 | |||
| CN110776908A | 2020-02-11 |
Attorney, Agent or Firm:
JOHNSON INTELLECTUAL PROPERTY AGENCY (SHENZHEN) (CN)
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