標題: Spectroscopy and femtosecond dynamics of type-II CdSe/ZnTe core-shell semiconductor synthesized via the CdO precursor
作者: Chen, CY
Cheng, CT
Yu, JK
Pu, SC
Cheng, YM
Chou, PT
Chou, YH
Chiu, HT
應用化學系
Department of Applied Chemistry
公開日期: 29-Jul-2004
摘要: CdSe/ZnTe type-II quantum dots (QDs) synthesized via the CdO precursor are reported. Spectroscopic and femtosecond dynamic measurements reveal that the rate of photoinduced electron/hole spatial separation decreases with increases in the size of the core, and it is independent of the thickness of the shell in the CdSe/ZnTe QDs. The results are consistent with the binding strength of the electron and hole confined at the center of CdSe. The correlation between the core/shell size and the electron/hole spatial separation rate resolved in this study may provide valuable information for applications where rapid photoinduced carrier separation followed by charge transfer into a matrix or electrode is crucial, such as in photovoltaic devices.
URI: http://dx.doi.org/10.1021/jp049177w
http://hdl.handle.net/11536/26556
ISSN: 1520-6106
DOI: 10.1021/jp049177w
期刊: JOURNAL OF PHYSICAL CHEMISTRY B
Volume: 108
Issue: 30
起始頁: 10687
結束頁: 10691
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