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Study on Photoluminescence Quenching of CdSe Core/Shell Quantum Dots with Organic Charge Transferring Material

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Abstract:

The effect of organic charge transferring material (CTM) on fluorescence of CdSe/ZnS and CdSe/CdS/ZnS core/shell quantum dots (QDs) are investigated by spectral methods. With the increase of organic molecular concentration, CTM can greatly quench the fluorescence of QDs and shorten the fluorescence lifetime of QDs. In the process of interacting with CTM, the efficiency of fluorescence quenching for CdSe/ZnS is significantly higher than that for CdSe/CdS/ZnS. The results of experiment show that the shell structure of QDs plays the major role in photoluminescence (PL) quenching. The mechanism of PL quenching of QDs is also analyzed.

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Periodical:

Advanced Materials Research (Volume 981)

Pages:

883-886

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.981.883

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Online since:

July 2014

Authors:

Yu Qiu Qu*, Liu Yang Zhang, Li Min An, Hong Wei, Gui Fan Li

Keywords:

Charge Transferring, Photoluminescence Quenching, Quantum Dot (QD)

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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