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.:
Date of Patent:
Jul. 01, 2025
Filed:
Sep. 09, 2022
Beijing Beida Jubang Science & Technology Co., Ltd, Beijing, CN;
Weixian Jubang New Material Sci & Tech Co., Ltd, Hebei, CN;
Zhiqiang Zhao, Beijing, CN;
Xiaobin Gao, Beijing, CN;
Baiyu Zhao, Beijing, CN;
Dehe Yin, Beijing, CN;
BeijingBeida Jubang Science & Technology Co., Ltd, Beijing, CN;
Weixian Jubang New Material Sei & Tech Co., Ltd, Hebei, CN;
Abstract
The present disclosure discloses a quantum dot (QD). The QD has a core-shell structure, and specifically has a structure of CdZnSeS/CdZnSe/CdZnS/ZnS, where there is a metal halide ligand between a CdZnS shell and a ZnS shell and outside the ZnS shell. The present disclosure also discloses a preparation method of the QD and a QD composite material prepared from the QD. The QD disclosed by the present disclosure has a small full width at half maxima (FWHM), excellent optical performance, and high stability. In the preparation method of the QD, an intermediate shell layer is prepared through alternate growth of anions and cations, and in addition to the introduction of a metal halide precursor, a long-chain alkanol is added to a shell to further improve the stability.