Facile synthesis and characterization of highly luminescent UV-blue-emitting ZnSe/ZnS quantum dots via a one-step hydrothermal method

Dan Zhao, Jiao Tian Li, Fang Gao, Cui Ling Zhang, Zhi Ke He*

*Corresponding author for this work

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The synthesis of water-soluble blue-emitting quantum dots (QDs) in aqueous solutions has attracted much attention recently, and here we report the synthesis of high-quality core/shell ZnSe/ZnS QDs through a one-step hydrothermal route with thiol ligand N-acetyl-l-cysteine (NAC) as the stabilizer. The impacts of various synthesis factors on the fluorescence properties of the prepared QDs have been systematically investigated. Under optimal conditions, the as-prepared QDs exhibit high photoluminescence quantum yield (∼39%), narrow full-width at half-maximum, and high photostability, due to the formation of a protective ZnS shell on the ZnSe core through the decomposition of NAC under high temperature. The core/shell structure of the ZnSe/ZnS QDs was verified by UV irradiation experiment, X-ray powder diffraction, and electron diffraction spectroscopy. This journal is

Original languageEnglish
Pages (from-to)47005-47011
Number of pages7
JournalRSC Advances
Volume4
Issue number87
DOIs
Publication statusPublished - 2014
Externally publishedYes

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