US 11,912,919 B2
Core-shell quantum dot, preparation method thereof, and electroluminescent light-emitting device containing the same
Baozhong Hu, Zhejiang (CN); Guangxu Li, Zhejiang (CN); Yanhong Mao, Zhejiang (CN); Yuan Gao, Zhejiang (CN); and Yehua Su, Zhejiang (CN)
Assigned to Najing Technology Corporation Limited, Zhejiang (CN)
Appl. No. 16/966,906
Filed by Najing Technology Corporation Limited, Zhejiang (CN)
PCT Filed Dec. 29, 2018, PCT No. PCT/CN2018/125322
§ 371(c)(1), (2) Date Aug. 3, 2020,
PCT Pub. No. WO2019/153961, PCT Pub. Date Aug. 15, 2019.
Claims priority of application No. 201810132073.4 (CN), filed on Feb. 9, 2018.
Prior Publication US 2021/0047562 A1, Feb. 18, 2021
Int. Cl. C09K 11/88 (2006.01); B82Y 20/00 (2011.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01); C01G 9/00 (2006.01); C01G 9/08 (2006.01); C01G 11/00 (2006.01); H10K 50/115 (2023.01)
CPC C09K 11/883 (2013.01) [C01G 9/006 (2013.01); C01G 9/08 (2013.01); C01G 11/006 (2013.01); H10K 50/115 (2023.02); B82Y 20/00 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C01P 2004/64 (2013.01); C01P 2004/80 (2013.01); C01P 2004/82 (2013.01); C01P 2006/60 (2013.01)] 15 Claims
 
1. A core-shell quantum dot, wherein a core of said quantum dot is CdSeXS(1-X), and shells of said quantum dot comprise a first shell and a second shell covering said first shell, said first shell being selected from one or more of ZnSe, ZnSeYS(1-Y) and Cd(Z)Zn(1-Z)S, said second shell being one of Cd(Z)Zn(1-Z)S and ZnS, a maximum emission peak of said core-shell quantum dot being less than or equal to 480 nm, wherein, 0<X<1, 0<Y<1, 0<Z<1; a photoluminescence efficiency of said quantum dot is greater than or equal to 90%.