Epitaxial Integration of Multiple CdSe Quantum Dots in a Colloidal CdS Nanoplatelet

Presynthesized CdSe/CdS core/shell quantum dots (QDs) are two-dimensionally (2D) and epitaxially fused in solution to form a CdS nanoplatelet with multiple epitaxially embedded CdSe QDs (CdSe@CdS coupled-dots@platelet). In addition to providing spatial confinement for the excitonic states of multipl...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2022-05, Vol.144 (19), p.8444-8448
Main Authors: Chen, Dongdong, Lei, Hairui, Zhu, Chenqi, Chen, Xing, Tian, He, Fang, Wei, Qin, Haiyan, Peng, Xiaogang
Format: Article
Language:English
Subjects:
Cadmium Compounds - chemistry
Quantum Dots - chemistry
Selenium Compounds - chemistry
Sulfides - chemistry
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Summary:Presynthesized CdSe/CdS core/shell quantum dots (QDs) are two-dimensionally (2D) and epitaxially fused in solution to form a CdS nanoplatelet with multiple epitaxially embedded CdSe QDs (CdSe@CdS coupled-dots@platelet). In addition to providing spatial confinement for the excitonic states of multiple CdSe QDs in a CdS nanoplatelet, the continuous and single-crystalline nanoplatelet with controlled thickness enables quantum coupling between the CdSe QDs, resulting in inhomogeneous-free optical properties for the colloidal CdSe@CdS coupled-dots@nanoplatelets with bright photoluminescence. The results here suggest that solution synthesis can offer a simple means to obtain semiconductor nanocrystals for realizing unique yet complex excitonic properties that are otherwise difficult to achieve.
ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.2c01498