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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9028723 B1

PDFFull Text
Date of Patent:
May. 12, 2015

Filed:

Feb. 25, 2010

Semiconductor nanoparticles and method for producing same

Applicants:

Tsukasa Torimoto, Nagoya, JP;

Ken-ichi Okazaki, Nagoya, JP;

Tatsuya Kameyama, Kitaibaraki, JP;

Takaaki Osaki, Fukui, JP;

Susumu Kuwabata, Ibaraki, JP;

Akihiko Kudo, Kawasaki, JP;

Inventors:

Tsukasa Torimoto, Nagoya, JP;

Ken-ichi Okazaki, Nagoya, JP;

Tatsuya Kameyama, Kitaibaraki, JP;

Takaaki Osaki, Fukui, JP;

Susumu Kuwabata, Ibaraki, JP;

Akihiko Kudo, Kawasaki, JP;

Assignees:

National University Corporation Nagoya University, Nagoya, JP;

Osaka University, Osaka, JP;

Tokyo University of Science Educational Foundation Administrative Organization, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Khanh Tuan Nguyen

Int. Cl.
CPC ...
H01B 1/02 (2006.01); C01B 19/00 (2006.01); B82Y 30/00 (2011.01); C01G 19/00 (2006.01); C01G 3/12 (2006.01); H01L 21/02 (2006.01);
U.S. Cl.
CPC ...
C01B 19/002 (2013.01); B82Y 30/00 (2013.01); C01P 2002/72 (2013.01); C01P 2002/77 (2013.01); C01P 2002/82 (2013.01); C01P 2002/85 (2013.01); C01P 2004/04 (2013.01); C01P 2004/64 (2013.01); H01L 21/02557 (2013.01); H01L 21/0256 (2013.01); H01L 21/02568 (2013.01); H01L 21/02628 (2013.01); C01G 19/006 (2013.01); C01G 3/12 (2013.01); Y10S 977/775 (2013.01);
Abstract

Copper(II) acetate, zinc(II) acetate, and tin(IV) acetate are weighed so that the total amount of metal ions is 2.0×10mol and the molar ratio of ions is Cu:Zn:Sn=2:1:1, and 2.0 cmof oleylamine is added to prepare a mixed solution. Apart from this, 1.0 cmof oleylamine is added to 2.0×10mol of sulfur powder to prepare a mixed solution. These mixed solutions are separately heated at 60° C. and mixed at room temperature. The pressure in a test tube is reduced, followed by nitrogen filling. The test tube is heated at 240° C. for 30 minutes and then allowed to stand until room temperature. The resultant product is separated into a supernatant and precipitates by centrifugal separation. The separated supernatant is filtered, methanol is added to produce precipitates. The precipitates are dissolved by adding chloroform to prepare a semiconductor nanoparticle solution.

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