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Synthesis of high-quality CdSe quantum dots in aqueous solution

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5 Author(s)
Yilin Wang ; Sch. of Chem. & Chem. Eng., Guangxi Univ., Nanning, China ; Kun Yang ; Huaqiao Pan ; Shengyan Liu
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By employing sodium selenite as selenium source and mercaptosuccinic acid (MSA) as stabiliser, the authors demonstrate that high-quality CdSe quantum dots (QDs) can be conveniently prepared in aqueous solution. The obtained products were characterised by UV-vis absorption, photoluminescence spectra, X-ray powder diffraction (XRD), and transmission electron microscopy (TEM). XRD analysis showed that the MSA-capped CdSe QDs were of cubic zinc-blende crystal structure, UV-vis absorption spectra and TEM exhibited that the QDs were nearly monodisperse and relatively uniform. The quantum yield of as-prepared CdSe QDs can reach up to 18%, and the full-width at halfmaximum value was merely 35 nm.

Published in:

Micro & Nano Letters, IET  (Volume:7 ,  Issue: 9 )