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Cation exchange assisted synthesis of ZnCdSe/ZnSe quantum dots with narrow emission line widths and near-unity photoluminescence quantum yields

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Abstract

Quantum dots with narrow emission line width have persistently received attention for their applications in biological imaging, lasers and next-generation displays. We herein report a cation exchange assisted shelling approach changing the starting CdSe emitting cores into new ZnCdSe alloy emitting cores and finally ZnCdSe/ZnSe core/shell QDs. The resulting ZnCdSe/ZnSe QDs exhibit an emission line width as narrow as 17.1 nm with a near-unity photoluminescence quantum yield and a single emission channel. We anticipate that our study on a cation exchange assisted synthetic route for controlling the emission line widths of the QDs could be extended to high-quality green and blue ones beyond currently achieved.

Graphical abstract: Cation exchange assisted synthesis of ZnCdSe/ZnSe quantum dots with narrow emission line widths and near-unity photoluminescence quantum yields

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Supplementary files

Article information


Submitted
19 Feb 2020
Accepted
24 Apr 2020
First published
30 Apr 2020

Chem. Commun., 2020, Advance Article
Article type
Communication

Cation exchange assisted synthesis of ZnCdSe/ZnSe quantum dots with narrow emission line widths and near-unity photoluminescence quantum yields

X. Jin, K. Xie, T. Zhang, H. Lian, Z. Zhang, B. Xu, D. Li and Q. Li, Chem. Commun., 2020, Advance Article , DOI: 10.1039/D0CC01302A

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