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Citation: LIU Ling, ZHAO Yao-Min, YANG Jie, ZHAO Chong-Jun, JIANG Zhi-Yu. Photoeletrochemical Behavior of Polypyrrole Nanofiber Array Electrodes[J]. Acta Physico-Chimica Sinica, ;2006, 22(03): 261-264. doi: 10.3866/PKU.WHXB20060301 shu

Photoeletrochemical Behavior of Polypyrrole Nanofiber Array Electrodes

1.
Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China

Received Date: 26 June 2005
Available Online: 10 March 2006

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.
- Polypyrrole;Anodic aluminium oxide membrane;Nano-fiber arrays; Photoelectrochemistry
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