Aqueous synthesis and photoluminescence properties of CdSe/CdS core/shell quantum dots

Limin An,Jie Yi,Chunxia Liu,Wenyu An,Zhiming Qin

ICEOE 2011 - 2011 International Conference on Electronics and Optoelectronics, Proceedings（2011）

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摘要

Thiol-capped CdSe/CdS core/shell quantum dots which show high luminescence quantum yield are synthesized in aqueous solution with the application of ultrasonic irradiation. A combination of X-ray diffraction (XRD), UV-Vis absorption spectroscopy and photoluminescence spectroscopy are employed to analyze the QDs and determine their crystal structures and optical characters. Photostabilities of bare CdSe and CdSe/CdS core/shell QDs are compared under UV irradiation. © 2011 IEEE.

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关键词

cdse/cds,core/shell,photoluminescence,photostability,quantum dots,quantum dot,magnetic properties,x ray diffraction,absorption,fluorescence lifetime,band gap,xrd,crystal structure,aqueous solution,wide band gap semiconductors,absorption spectroscopy,luminescence,epitaxial growth,quantum yield

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