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Patent Searching and Data


Title:
QUANTUM DOT AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2021/070858
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a quantum dot which absorbs near infrared light having wavelengths of 1300 nm or more and which is represented by the formula Ag2E (E is at least one of Te, Se and S); and a method for producing a quantum dot, the method enabling mass production and being highly safe. This quantum dot is characterized by: being a nanocrystal represented by the formula Ag2E (E is at least one of tellurium, selenium and sulfur), which contains silver and a chalcogen; and the absorption wavelength of the quantum dot falling within the near infrared region of 1300-1500 nm. This method for producing a quantum dot is characterized by having a step for obtaining a CuE intermediate (E is at least one of tellurium, selenium and sulfur) prepared from a silver raw material and a chalcogen raw material; and a step for subjecting the CuE intermediate to a cation exchange reaction using the Ag raw material so as to synthesize a quantum dot represented by Ag2E (E is at least one of tellurium, selenium and sulfur).

Inventors:
SIMASAKI TOSHIAKI (JP)
NIKATA SOICHIRO (JP)
TAKASAKI MIKIHIRO (JP)
Application Number:
PCT/JP2020/037980
Publication Date:
April 15, 2021
Filing Date:
October 07, 2020
Export Citation:
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Assignee:
NS MAT INC (JP)
International Classes:
C01B19/04; B82Y20/00; B82Y40/00; C09K11/08; C09K11/58; C09K11/88; H01L31/08
Domestic Patent References:
WO2019022217A12019-01-31
WO2019074083A12019-04-18
WO2012163078A12012-12-06
Foreign References:
CN106190126A2016-12-07
CN106520124A2017-03-22
CN110734767A2020-01-31
Other References:
CHEN CHI, HE XUEWEN, GAO LI, MA NAN: "Cation Exchange-Based Facile Aqueous Synthesis of Small, Stable, and Nontoxic Near-Infrared Ag 2 Te/ZnS Core/Shell Quantum Dots Emitting in the Second Biological Window", APPLIED MATERIALS & INTERFACES, AMERICAN CHEMICAL SOCIETY, US, vol. 5, no. 3, 13 February 2013 (2013-02-13), US, pages 1149 - 1155, XP055793313, ISSN: 1944-8244, DOI: 10.1021/am302933x
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (JP)
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