Spectroscopy and Femtosecond Dynamics of Type-II CdSe/ZnTe Core−Shell Semiconductor Synthesized via the CdO Precursor

Spectroscopy and Femtosecond Dynamics of Type-II CdSe/ZnTe Core−Shell Semiconductor Synthesized via the CdO Precursor

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 th...

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Veröffentlicht in:The journal of physical chemistry. B 2004-07, Vol.108 (30), p.10687-10691
Hauptverfasser: Chen, Chun-Yen, Cheng, Chiu-Ting, Yu, Jen-Kan, Pu, Shih-Chieh, Cheng, Yi-Ming, Chou, Pi-Tai, Chou, Yi-Hsuan, Chiu, Hsin-Tien
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container_issue 30
container_start_page 10687
container_title The journal of physical chemistry. B
container_volume 108
creator Chen, Chun-Yen
Cheng, Chiu-Ting
Yu, Jen-Kan
Pu, Shih-Chieh
Cheng, Yi-Ming
Chou, Pi-Tai
Chou, Yi-Hsuan
Chiu, Hsin-Tien
description 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.
doi_str_mv 10.1021/jp049177w
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title Spectroscopy and Femtosecond Dynamics of Type-II CdSe/ZnTe Core−Shell Semiconductor Synthesized via the CdO Precursor
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