Coated semiconductor nanoparticle and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-2016272883-A1
Application number	US-201615067712-A
Country	US
Kind code	A1
Filing date	Mar 11, 2016
Priority date	Mar 17, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

An object is to provide a coated semiconductor nanoparticle having sufficient fluorescence intensity.
A method for manufacturing a coated semiconductor nanoparticle according to the present invention relates to a method for manufacturing a coated semiconductor nanoparticle containing a semiconductor nanoparticle having a core/shell structure and a translucent coating layer containing silicon coating the semiconductor nanoparticle. The method includes a step of bringing the semiconductor nanoparticle into contact with a silane compound in the presence of an antioxidant and that the antioxidant contains at least one kind selected from the group consisting of compounds containing at least one of a phosphor atom and a sulfur atom and no hydroxy group.

First claim

What is claimed is:

1 . A method for manufacturing a coated semiconductor nanoparticle containing a semiconductor nanoparticle having a core/shell structure and a translucent coating layer containing silicon coating the semiconductor nanoparticle, comprising
a step of bringing the semiconductor nanoparticle into contact with a silane compound in the presence of an antioxidant, wherein the antioxidant contains at least one kind selected from the group consisting of compounds containing at least one of a phosphor atom and a sulfur atom and no hydroxy group.

2 . The method for manufacturing a coated semiconductor nanoparticle according to claim 1 , wherein the antioxidant contains at least one kind selected from the group consisting of a phosphite compound and a thioether compound.

3 . The method for manufacturing a coated semiconductor nanoparticle according to claim 1 , wherein the antioxidant contains at least one kind selected from the group consisting of compounds represented by the following General Formulae 1 to 6 and the Chemical Formulae S1 and S2.

(In the formula, R 1 and R 2 each independently represent a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms.)

(In the formula, R 3 , R 4 , R 5 , and R 6 each independently represent a substituted or unsubstituted alkyl group having 1 to 25 carbon atoms or a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, and R 7 represents a substituted or unsubstituted alkylene group having 4 to 33 carbon atoms or a substituted or unsubstituted arylene group having 6 to 40 carbon atoms.)

(In the formula, Ar 1 and Ar 2 each independently represent a substituted or unsubstituted aryl group having 6 to 35 carbon atoms.)

(In the formula, R 8 and R 9 each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms.)

(In the formula, R 10 and R 11 each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms.)

(In the formula, R 12 and R 14 each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, and R 13 represents a substituted or unsubstituted alkyl group having 1 to 18 carbon atoms.

R 15 : alkyl group having 12 carbon atoms

4 . The method for manufacturing a coated semiconductor nanoparticle according to claim 1 , wherein, in the step, the antioxidant is added to the dispersion in which the semiconductor nanoparticles are dispersed such that the ratio of the antioxidant is 0.1 to 200 mol % with respect to 1 mol of the semiconductor nanoparticle.

5 . A coated semiconductor nanoparticle manufactured by the manufacturing method according to claim 1 .

6 . A semiconductor nanoparticle aggregate containing an agglomerate in which the plurality of the coated semiconductor nanoparticles according to claim 5 is agglomerated.

Assignees

• Konica Minolta Inc

Inventors

• Yamane Chigusa
• Goan Kazuyoshi
• Kawasaki Hidekazu
• Kashiwagi Tsuneo
• Fujieda Yoichi

Classifications

• C09K11/565

  with zinc cadmium · CPC title

• C09K11/70

  containing phosphorus · CPC title

• C09K11/02 Primary

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

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• C09K11/88

  containing selenium, tellurium or unspecified chalcogen elements · CPC title