发光学报Issue(1)：26-31,6.DOI:10.3788/fgxb20123301.0026
巯基丙酸分子对CdSe核壳量子点和ZnO纳米粒子薄膜之间电荷转移的影响
Effect of Mercaptopropionic Acid Molecules on Electron Transfer from CdSe Core/Shell Quantum Dots to ZnO Nanocrystal Films
摘要
Abstract
The effect of mercaptopropionic acid ( MPA) molecules on the charge transfer process from the quantum dots to ZnO nanocrystal films was studied in this paper by the steady-state and time-resolved photoluminescence spectroscopy. The obtained high efficiently photoluminescent CdSe core CdS/ZnS-multishell quantum dots with few defects are air stable in quantum dot based devices. Three samples were prepared to make the measurements of time-resolved photoluminescence spectra, CdSe quantum dots film, CdSe quantum dots spun cast on ZnO nanocrystal film (CdSe/ZnO) , and MPA molecules linked CdSe quantum dots and ZnO nanocrystal film ( CdSe/MPA/ZnO). The short ening of photoluminescence life times of CdSe quantum dots deposited on ZnO nanocrystal films with and without MPA molecules indicated the electron transfer process happened in the interface between CdSe quantum dots and ZnO nanocrystals. But the decreased rate of electron transfer from CdSe quantum dots to ZnO nanocrystal films with MPA molecules was found, compared to the electron transfer rate of the CdSe/ZnO sample. Considering the fact that MPA molecules did not improve the charge transfer process from CdSe quantum dots to ZnO nanocrystal films, it was indicated that the MPA molecules was not a good choice in CdSe quantum dot sensitized solar cell. The experimental result suggested that the direct adsorption of CdSe quantum dots on metal oxide nanocrystal films would obtain quantum dot sensitized solar cell with higher power conversion efficiency.关键词
巯基丙酸/CdSe量子点/电荷转移/光致发光Key words
mercaptopropionic acid/ quantum dot/ electron transfer/ photoluminescence分类
数理科学引用本文复制引用
邵聪,刘学彦,赵家龙..巯基丙酸分子对CdSe核壳量子点和ZnO纳米粒子薄膜之间电荷转移的影响[J].发光学报,2012,(1):26-31,6.基金项目
国家自然科学基金(10874179和60976049)资助项目 （10874179和60976049）
