https://scholars.lib.ntu.edu.tw/handle/123456789/181089
標題: | Spectroscopy and Femtosecond Dynamics of Type-II CdSe/ZnTe Core?Shell Semiconductor Synthesized via the CdO Precursor | 作者: | Chen, Chun-Yen Cheng, Chiu-Ting Yu, Jen-Kan Pu, Shih-Chieh Cheng, Yi-Ming Chou, Pi-Tai Chou, Yi-Hsuan PI-TAI CHOU |
公開日期: | 2004 | 卷: | 108 | 期: | 30 | 起(迄)頁: | 10687-10691 | 來源出版物: | The Journal of Physical Chemistry B | 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://ntur.lib.ntu.edu.tw//handle/246246/164771 | DOI: | 10.1021/jp049177w | SDG/關鍵字: | Binding energy; Charge transfer; Electrodes; Electrons; Matrix algebra; Photovoltaic cells; Semiconductor quantum dots; Separation; Synthesis (chemical); Thickness control; Electron/hole spatial separation; Femtosecond dynamics; Photoinduced carrier separation; Precursors; Semiconducting cadmium compounds |
顯示於: | 化學系 |
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