THE PHOTOELECTROCHEMICAL BEHAVIOR OF POLYPYRROLE FILMS IN NONAQUEOUS SOLUTIONS
- 化学化工－已发表论文 
The photoelectrochemical behavior of polypyrrole film in non-aqueous solution has been investigated. From the photocurrent spectra, it was found that the bandgap of the allowed direct transition of the film is about 2.6 eV. The time dependence Of cathodic photocurrent showed that the photocurrent decreased quite distinctively with time and the photocurrent 'onset' potential moved in the more cathodic direction after several potential cycles. A novel method has been devised for monitoring the growth of the polypyrrole by using in situ photoelectrochemical techniques. The results showed that the growth of the films could be divided into at least three stages, i.e., one 'induced period' and two 'steady developing stages'. It was also demonstrated that a trace of water has distinctive effect on the photoelectrochemical behavior of polypyrrole in the growth process.