Phosphine precursor for preparing quantum dot and quantum dot prepared therefrom

Patent metadata

Field	Value
Publication number	US-11999762-B2
Application number	US-202217715470-A
Country	US
Kind code	B2
Filing date	Apr 7, 2022
Priority date	May 18, 2017
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

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 method for preparing a phosphine precursor represented by the following Chemical Formula 1, comprising the steps of:
preparing a mixture of (i) a primary phosphine compound having the formula Q 1 PH 2 or a secondary phosphine compound having the formula Q 1 Q 2 PH, (ii) an ether solvent, and (iii) alkyl lithium; and
adding a silyl halide compound to the mixture:

in the Chemical Formula 1,
Q 1 is

Q 2 iS

Q 3 is

wherein R 1 to R 9 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, and
wherein at least one pair selected from the group consisting of (i) Q 1 and Q 2 , (ii) Q 1 and Q 3 , and (iii) Q 2 and Q 3 are different from each other.

2. The method for preparing a phosphine precursor according to claim 1 , wherein the ether solvent is tetrahydrofuran and the alkyl lithium is butyl lithium.

3. The method for preparing a phosphine 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.

4. The method for preparing a phosphine precursor according to claim 1 , wherein R 1 to R 9 are each independently methyl, ethyl, n-propyl, iso-propyl, n-butyl, tert-butyl, iso-butyl, or phenyl.

5. The method for preparing a phosphine precursor according to claim 1 , wherein the compound of the Chemical Formula 1 is selected from the group consisting of the following Structural Formulas:

6. The method for preparing a phosphine precursor according to claim 1 , wherein the compound of the Chemical Formula 1 is selected from the group consisting of the following Structural Formulas:

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

• C07F9/06 Primary

  without P—C bonds · CPC title

• C09K11/565 Primary

  with zinc cadmium · CPC title

• C09K11/02 Primary

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

• C07F19/00

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

• C09K11/70

  containing phosphorus · CPC title