Acta Chimica Sinica ›› 2006, Vol. 64 ›› Issue (4): 301-305. Previous Articles     Next Articles

Original Articles

含不同链长的三个卟啉LB膜修饰电极的光电响应研究

李富友*,1,余军华2,张宝文2,黄春辉1   

  1. (1复旦大学先进材料实验室 上海 200433)
    (2中国科学院理化技术研究所 北京 100101)
  • 收稿日期:2005-05-18 修回日期:2005-10-09 出版日期:2006-02-28 发布日期:2006-02-28
  • 通讯作者: 李富友

Study on Photocurrent Generation of Three Porphyrin Monolayer Modified Electrodes with Various Side Chain Lengths

LI Fu-You*,1, YU Jun-Hua2, ZHANG Bao-Wen2, HUANG Chun-Hui1   

  1. (1 Laboratory of Advanced Materials, Fudan University, Shanghai 200433)
    (2 Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101)
  • Received:2005-05-18 Revised:2005-10-09 Online:2006-02-28 Published:2006-02-28
  • Contact: LI Fu-You

Three porphyrin derivative monolayers (C4Py, C6Py and C8Py) terminated with different chain lengths were successfully deposited on indium-tin oxide (ITO) electrodes using Langmuir-Blodgett (LB) technique, and the sensitized ITO electrodes exhibited high photocurrent values under ambient conditions. Action spectra of the photocurrent generation were coincident with the UV-Vis absorption spectra of these porphyrin LB monolayer modified electrodes, indicating that these porphyrin derivatives were responsible for photocurrent generation. The observed photocurrent strongly depended on the electron donor, electron acceptor and bias voltage, suggesting that photoinduced electron transfer should be a main mechanism of light sensitization for the photocurrent generation. The photocurrents were varied with the side chain length, and the compound C6Py with a longer chain exhibited the maximum photocurrent.

Key words: porphyrin derivative, LB film, photocurrent generation