Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (06): 520-526.doi: 10.3866/PKU.WHXB19980608

• ARTICLE • Previous Articles     Next Articles

The Charge Transfer Process in Ru-bipydle Complexes Sensitized Nanocrystalline TiO2 Films

Qin Yuan-Dong, Wang Jing-Jing, Zou Ying-Hua, Yang Rong, Wang Wei-Bo, Hou Yuan-Jun, Xiao Xu-Rui, Zhang Bao-Wen, Cao Yi   

  1. Department of Physics,Mesoscopic Physics Laboratory,Peking University,Beijing 100871|Institute of Photographic Chemistry,Academia Sinica,Beijing 100101
  • Received:1997-09-18 Revised:1997-12-25 Published:1998-06-15
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Abstract:

So far in the sensitization research of semiconductor nanoparticles, the outstanding sensitizing system is nanocrystalline TiO2 films sensitized by Ru-bipyridle complxes. In this Paper, we have investigated the electron injection and electron-hole recombination dynamics of two systems sensitized by [3, 3'-(LL)]2 Ru(NCS)2 and [4,4'-(LL)]2Ru(NCS)2. A simple and effective model for calculation has also been presented. Through calculation and fitting, it, is shown that the electron injection is completed within 50 fs for both systems. We have also performed photocurrent spectra measurement. The result indicters that the charge injection efficiency is a major limit factor to incident-photon-to-current efficiency(IPCE). The research is meaningful for sunlight-electricity conversion and solar cells fabrication.

Key words: Dye sensitization, Electron injection, IPCE