Phosphine precursor for preparing quantum dot and quantum dot prepared therefrom

Patent metadata

Field	Value
Publication number	US-2020140467-A1
Application number	US-201816613884-A
Country	US
Kind code	A1
Filing date	May 16, 2018
Priority date	May 18, 2017
Publication date	May 7, 2020
Grant date	—

Abstract

The present invention relates to a phosphine precursor for the preparation of a quantum dot, and a quantum dot prepared therefrom. Using the phosphine precursor for the preparation of a quantum dot of the present invention, a quantum dot with improved luminous efficiency and higher luminous color purity can be provided.

First claim

What is claimed is:

1 . A phospine precursor for the preparation of a quantum dot, represented by the following Chemical Formula 1:

in the Chemical Formula 1,
Q 1 is

Q 2 is

Q 3 is

wherein R1 to R9 are identical to or different from each other, and each independently, C1-20 linear or branched alkyl, C6-30 aryl, C7-30 alkylaryl, or C7-30 arylalkyl,
provided that all Q 1 to Q 3 are not the same structure.

2 . The phospine precursor according to claim 1 , wherein R 1 to R 9 are each independently, C1-6 linear alkyl, C3-6 branched alkyl, or C6-12 aryl.

3 . The phospine precursor according to claim 1 , wherein R1 to R9 are each independently, methyl, ethyl, n-propyl, iso-propyl, n-butyl, tert-butyl, iso-butyl, or phenyl.

4 . The phospine precursor according to claim 1 , wherein the compound of the Chemical Formula 1 is selected form the group consisting of the following Structural Formulas:

5 . The phospine precursor according to claim 1 , wherein the compound of the Chemical Formula 1 is represented by the following Chemical Formula 1-1:

in the Chemical Formula 1-1,
R 1 ′ to R 6 ′ are identical to or different from each other, and each independently, C1-20 linear or branched alkyl, C6-30 aryl, C7-30 alkylaryl, or C7-30 arylalkyl, provided that all R 1 ′ to R 6 ′ are not methyl.

6 . The phospine precursor according to claim 1 , wherein the compound of the Chemical Formula 1 is represented by the following Chemical Formula 1-2:

in the Chemical Formula 1-2,
R 1 ″ to R 3 ″ are identical to or different from each other, and each independently, C1-20 linear or branched alkyl, C6-30 aryl, C7-30 alkylaryl, or C7-30 arylalkyl, provided that all R 1 ″ to R 3 ″ are not methyl.

7 . A method for preparing the phosphine precursor of claim 1 , comprising the steps of:
preparing a mixture of a primary or secondary phosphine compound, halogenated hydrocarbon, and tertiary amine; and adding a silyl triflate compound to the mixture.

8 . The method for preparing the phosphine precursor according to claim 7 , wherein the halogenated hydrocarbon is dichloromethane, and the tertiary amine is trimethylamine.

9 . A method for preparing the phosphine precursor of claim 1 , comprising the steps of:
preparing a mixture of a primary or secondary phosphine compound, an ether solvent, and alkyl lithium; and adding a silyl halide compound to the mixture.

10 . The method for preparing a phosphine precursor according to claim 9 , wherein the ether solvent is tetrahydrofuran, and the alkyl lithium is butyl lithium.

11 . A precursor composition for the preparation of a quantum dot, comprising the phosphine precursor of claim 1 .

12 . The precursor composition for the preparation of a quantum dot according to claim 11 , further comprising tris(trimethylsilyl)phosphine.

13 . A quantum dot prepared from the phosphine precursor of claim 1 .

14 . The quantum dot according to claim 13 , wherein the quantum dot comprises InP as a core.

15 . A method for preparing a quantum dot using one or more phosphine precursors of claim 1 .

16 . The method for preparing a quantum dot according to claim 15 , wherein the method comprises the steps of:
heating a mixture of an indium precursor, a zinc precursor, myristic acid and 1-octadecene; cooling the mixture to room temperature; introducing one or more of the phosphine precursors, a gallium precursor, and 1-octadecene into the cooled mixture, and heating and reacting; and introducing dodecanethiol into the reactant, and cooling.

17 . The method for preparing a quantum dot according to claim 16 , wherein the one or more of the phosphine precursors are additionally mixed with tris(trimethylsilyl)phosphine.

Assignees

• Sk Chemicals Co Ltd

Inventors

• Park Jeong Ho
• Chae Hee Il
• Yoon Kyung Sil
• Kang Ju-Sik
• Chang Yu Mi
• Yang Nam-Choul
• Park Jae Kyun
• Lee Song

Classifications

• C09K11/70

  containing phosphorus · CPC title

• C07F19/00

  Metal compounds according to more than one of main groups C07F1/00 - C07F17/00 · CPC title

• C07F9/06 Primary

  without P—C bonds · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• C09K11/02 Primary

  Use of particular materials as binders, particle coatings or suspension media therefor · CPC title