Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (03): 261-264.doi: 10.3866/PKU.WHXB20060301

• ARTICLE •     Next Articles

Photoeletrochemical Behavior of Polypyrrole Nanofiber Array Electrodes

LIU Ling; ZHAO Yao-Min; YANG Jie; ZHAO Chong-Jun; JIANG Zhi-Yu   

  1. Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
  • Received:2005-06-26 Revised:2005-09-20 Published:2006-03-10
  • Contact: JIANG Zhi-Yu

Abstract: Polypyrrole (PPy) nano-fiber array electrodes were fabricated by electrochemical deposition of PPy in the pores of anodic aluminium oxide (AAO) templates. The photocurrent appeared at the potential below -0.1 V (vs Ag/AgCl) was caused by the p-type semiconductor properties of PPy material. Its flat-band potential Efb was determined as -0.217 V (vs Ag/AgCl). The photocurrent of PPy nano-fiber array electrode varied with the length of the PPy nanofibers. For very thin PPy nano-fiber array the photocurrent was small. But if the arrays were too thick the photocurrent was also small because the photo-induced electrons might recombine with photo-induced holes in the film before reaching the back contact. The optimum thickness was 42 nm. The PPy nano-fiber devices might be used as nano photo-electronic device in the future.

Key words: Polypyrrole, Anodic aluminium oxide membrane, Nano-fiber arrays, Photoelectrochemistry