Organic ligand and preparation method thereof, quantum dot structure material, quantum-dot-containing layer, and light emitting diode

Patent metadata

Field	Value
Publication number	US-10975014-B2
Application number	US-201615741756-A
Country	US
Kind code	B2
Filing date	Dec 2, 2016
Priority date	Jul 1, 2016
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

The present disclosure provides quantum dot organic ligand and preparation method thereof, quantum dot structure material, quantum-dot-containing layer, and quantum-dot-containing light emitting diode. The quantum dot organic ligand have the following structure R1-(R2) n -R3, wherein R1 is a chelating group capable of chelating with a metal; R2 is a group having a conjugated electron pair, and n is a positive integer; and R3 is organic group. The conjugated electron pair structure of R2 facilitates delocalization of electrons, which can improve the transport and conduction of electrons and/or holes, thereby improving the efficiency of quantum dots and lowering the turn-on voltage.

First claim

What is claimed is:

1. A quantum dot organic ligand, comprising a structure represented by a formula selected from a group consisting of:

and
R1-(R2-R3) n , wherein R1 is a chelating group capable of chelating with a metal, R2 comprises a structure selected from the group consisting of a 9, 10-di(2-naphthyl)anthracene structure, a rubrene structure, and a combination thereof, R3 is an organic group connected to R2;
wherein n is a positive integer.

2. The quantum dot organic ligand according to claim 1 , wherein R1 comprises a group selected from the group consisting of a phosphine group, a phosphonic acid group, an amino group, a mercapto group, a hydroxyl group, and a combination thereof.

3. The quantum dot organic ligand according to claim 1 , wherein R3 comprises an alkane group.

4. A quantum dot structure, comprising:
the quantum dot organic ligand according to claim 1 in chelated form; and
a core or a core-shell;
wherein the quantum dot organic ligand is chelated to the core, or to a shell part of the core-shell.

5. The quantum dot structure of claim 4 , comprising a structure represented by Formula (3):

wherein:
QD is an inorganic part of the quantum dot structure, comprising the core or the core-shell.

6. The quantum dot structure according to claim 5 , wherein the inorganic part of the quantum dot structure is made of one or more materials selected from CdS, CdSe, CdTe, ZnSe, InP, PbS, CsPbCl 3 , CsPbBr 3 , CsPhI 3 , CsPbCl x Br 3-x , CsPbBr x I 3-x , CdS/ZnS, CdSe/ZnS, ZnSe, InP/ZnS, PbS/ZnS, CsPbCl 3 /ZnS, CsPbBr 3 /ZnS, CsPhI 3 /ZnS, CsPbClxBr 3-x /ZnS, CsPbBrxI 3-x /ZnS, or a combination thereof, wherein x is a positive integer and x<3.

7. The quantum dot structure of claim 4 , comprising a structure represented by Formula (4)

wherein:
QD represents an inorganic part of the quantum dot structure, comprising the core or the core-shell.

8. The quantum dot structure according to claim 7 , wherein the inorganic part of the quantum dot structure is made of one or more materials selected from CdS, CdSe, CdTe, ZnSe, InP, PbS, CsPbCl 3 , CsPbBr 3 , CsPhI 3 , CsPbCl x Br 3-x , CsPbBr x I 3-x , CdS/ZnS, CdSe/ZnS, ZnSe, InP/ZnS, PbS/ZnS, CsPbCl 3 /ZnS, CsPbBr 3 /ZnS, CsPhI 3 /ZnS, CsPbClxBr 3-x /ZnS, CsPbBrxI 3-x /ZnS, or a combination thereof, wherein x is a positive integer and x<3.

9. A quantum-dot-containing layer, comprising the quantum dot structure according to claim 4 .

10. A quantum-dot-based light emitting diode, comprising a quantum-dot-containing layer according to claim 9 .

Assignees

• Boe Technology Group Co Ltd

Inventors

• Chen Zhuo

Classifications

• C07C57/40

  containing condensed ring systems · CPC title

• C07C1/30 Primary

  by splitting-off the elements of hydrogen halide from a single molecule · CPC title

• C07C51/353

  by isomerisation; by change of size of the carbon skeleton · CPC title

• C08G61/02

  Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes · CPC title

• C08G2261/3422

  conjugated, e.g. PPV-type · CPC title