物理化学学报 >> 1998, Vol. 14 >> Issue (06): 520-526.doi: 10.3866/PKU.WHXB19980608

研究论文 上一篇    下一篇

TiO2的联吡啶-钌化合物敏化及电子转移过程

秦元东, 王晶晶, 邹英华, 杨蓉, 王维波, 侯原军, 肖绪瑞, 张宝文, 曹怡   

  1. 北京大学物理系,人工微结构和介观物理国家重点实验室,北京 100871|中国科学院感光化学研究所,北京 100101
  • 收稿日期:1997-09-18 修回日期:1997-12-25 发布日期:1998-06-15
  • 通讯作者: 邹英华

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
  • Contact: Zou Ying-Hua

摘要:

用飞秒时间分辨的泵浦-探测方法对两种联吡啶-钌化合物[3,3'-(LL)]_2Ru(NCS)_2和[4,4'-(LL)]_2Ru(NCS)_2敏化体系的光吸收、电子注入(injection)及电子-空穴复合(recombination)动力学过程作了研究.提出了一个简单有效的计算模型,通过计算拟合得出两种敏化体系的电子注入均在50fs内完成. 最后还对光电流谱作了研究,对影响光电转换效率(incident photon-to-current efficiency(IPCE))的各种因素作了讨论. 结果对太阳光的电能转换和太阳能电池的制作有一定的意义.

关键词: 染料敏化, 电子注入, 光电转移效率(IPCE)

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