Title:
METHOD FOR PREPARING CORE-SHELL QUANTUM DOT
Document Type and Number:
WIPO Patent Application WO/2021/018060
Kind Code:
A1
Abstract:
Disclosed in the present application is a method for preparing a core-shell quantum dot. The method for preparing the core-shell quantum dot comprises the following steps: providing an initial quantum dot containing a first cation; mixing the initial quantum dot with a precursor of a second cation and a precursor of a third cation to form a mixed system, the precursor of the second cation being used to form a shell layer, and the third cation being used to promote the outward diffusion of the first cation; adding into the mixed system an anion precursor used for forming the shell layer, and the anion precursor reacting with the precursor of the second cation and the first cation diffused from the initial quantum dot to form an alloy shell layer, so as to prepare the core-shell quantum dot. In the core-shell quantum dot obtained in the present application, the shell layer has a high degree of alloying, which is more conducive to obtaining a core-shell quantum dot having a short fluorescence emission wavelength; the synthesis method of the core-shell quantum dot is simple, the repeatability is good, and the reaction time is short.
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Inventors:
ZHOU JIANHAI (CN)
YU SHIRONG (CN)
YU SHIRONG (CN)
Application Number:
PCT/CN2020/104648
Publication Date:
February 04, 2021
Filing Date:
July 24, 2020
Export Citation:
Assignee:
NAJING TECH CORP LTD (CN)
International Classes:
C09K11/02; C09K11/54; C09K11/56
Domestic Patent References:
| WO2013066630A1 | 2013-05-10 |
Foreign References:
| CN106281311A | 2017-01-04 | |||
| CN104946257A | 2015-09-30 |
Other References:
CHIEN-HAO HUANG, CHIEN-HSIN YANG, YEONG-TARNG SHIEH, TZONG-LIU WANG: "Synthesis and properties of alloyed CdxZn1-xSe core and manganese-doped CdxZn1-xSe/ZnS core/shell nanocrystals", JOURNAL OF ALLOYS AND COMPOUNDS, vol. 748, 5 June 2018 (2018-06-05), pages 265 - 272, XP055776411, DOI: 10.1016/j.jallcom.2018.03.140
ELAN HOFMAN; RICHARD JOHN ROBINSON; ZHI-JUN LI; BORIS DZIKOVSKI; WEIWEI ZHENG: "Controlled Dopant Migration in CdS/ZnS Core/Shell Quantum Dots", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 139, no. 26, 5 July 2017 (2017-07-05), pages 8878 - 8885, XP055465384, ISSN: 0002-7863, DOI: 10.1021/jacs.7b02320
DONGLAI HAN , JIAN CAO , SHUO YANG , JINGHAI YANG , BINGJI WANG , LIN FAN , QIANYU LIU , TINGTING WANG , HAIFENG NIU: "Investigation of composition dependent structural and optical properties of the Zn1−xCdxS, coaxial Zn0.99−xCdxCu0.01S/ZnS, Zn0.99−xCdxMn0.01S nanorods generated by a one-step hydrothermal process", DALTON TRANS, vol. 43, no. 28, 12 May 2014 (2014-05-12), pages 11019 - 11026, XP055776424, ISSN: 1477-9226, DOI: 10.1039/C4DT00667D
YUAN YUCHENG, ZHU HUA, WANG XUDONG, CUI DINGZHOU, GAO ZEHUA, SU DONG, ZHAO JING, CHEN OU: "Cu-Catalyzed Synthesis of CdZnSe−CdZnS Alloy Quantum Dots with Highly Tunable Emission", CHEMISTRY OF MATERIALS, vol. 31, no. 7, 21 March 2019 (2019-03-21), pages 2635 - 2643, XP055776430, ISSN: 0897-4756, DOI: 10.1021/acs.chemmater.9b00557
XU RUILIN, LIAO CHEN, ZHANG HUICHAO, HUANG BO, FAN KAI, GAO XIAOQIN, CUI YIPING, ZHANG JIAYU: "Flash” synthesis of “giant” Mn-doped CdS/ZnS nanocrystals for high photostability", RSC ADV, vol. 5, 15 October 2015 (2015-10-15), pages 88921 - 88927, XP055776435, DOI: 10.1039/C5RA17200D
ELAN HOFMAN; RICHARD JOHN ROBINSON; ZHI-JUN LI; BORIS DZIKOVSKI; WEIWEI ZHENG: "Controlled Dopant Migration in CdS/ZnS Core/Shell Quantum Dots", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 139, no. 26, 5 July 2017 (2017-07-05), pages 8878 - 8885, XP055465384, ISSN: 0002-7863, DOI: 10.1021/jacs.7b02320
DONGLAI HAN , JIAN CAO , SHUO YANG , JINGHAI YANG , BINGJI WANG , LIN FAN , QIANYU LIU , TINGTING WANG , HAIFENG NIU: "Investigation of composition dependent structural and optical properties of the Zn1−xCdxS, coaxial Zn0.99−xCdxCu0.01S/ZnS, Zn0.99−xCdxMn0.01S nanorods generated by a one-step hydrothermal process", DALTON TRANS, vol. 43, no. 28, 12 May 2014 (2014-05-12), pages 11019 - 11026, XP055776424, ISSN: 1477-9226, DOI: 10.1039/C4DT00667D
YUAN YUCHENG, ZHU HUA, WANG XUDONG, CUI DINGZHOU, GAO ZEHUA, SU DONG, ZHAO JING, CHEN OU: "Cu-Catalyzed Synthesis of CdZnSe−CdZnS Alloy Quantum Dots with Highly Tunable Emission", CHEMISTRY OF MATERIALS, vol. 31, no. 7, 21 March 2019 (2019-03-21), pages 2635 - 2643, XP055776430, ISSN: 0897-4756, DOI: 10.1021/acs.chemmater.9b00557
XU RUILIN, LIAO CHEN, ZHANG HUICHAO, HUANG BO, FAN KAI, GAO XIAOQIN, CUI YIPING, ZHANG JIAYU: "Flash” synthesis of “giant” Mn-doped CdS/ZnS nanocrystals for high photostability", RSC ADV, vol. 5, 15 October 2015 (2015-10-15), pages 88921 - 88927, XP055776435, DOI: 10.1039/C5RA17200D
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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