標題: | Theoretical treatments of ultrafast electron transfer from adsorbed dye molecule to semiconductor nanocrystalline surface |
作者: | Liang, Kuo Kan Lin, Chih-Kai Chang, Huan-Cheng Hayashi, Michitoshi Lin, Sheng Hsien 應用化學系 Department of Applied Chemistry |
公開日期: | 21-十月-2006 |
摘要: | In studying ultrafast electron transfer from a dye molecule to a nanosized semiconductor particle, pump-probe experiments are commonly used. In this system the electron transfer (ET) rate is faster than vibrational relaxation so that the ET rate should be described by a single-level rate constant and the probing signal (often in the form of time-resolved spectra) contains the contribution from the dynamics of both population and coherence (i.e., wave packet). In this paper, we shall present the theoretical treatments for femtosecond time-resolved pump-probe experiment and the dynamics of population and coherence by the density matrix method, and the calculation of single-level ET rate constant involved in a pump-probe experiment. As an application, we show the theoretical results using parameters extracted from experiments on a specific dye/semiconductor system. (c) 2006 American Institute of Physics. |
URI: | http://dx.doi.org/10.1063/1.2359445 http://hdl.handle.net/11536/11662 |
ISSN: | 0021-9606 |
DOI: | 10.1063/1.2359445 |
期刊: | JOURNAL OF CHEMICAL PHYSICS |
Volume: | 125 |
Issue: | 15 |
結束頁: | |
顯示於類別: | 期刊論文 |