The mechanism of photocurrent decay with time of illumination of PbS-coated TiO2 (PbS/TiO2) photoelectrochemical cells in S2- and SO32- solution was investigated. The photocurrent decay at short circuit can primarily be attributed to the formation of PbSO4 on the surface of PbS, followed by the dissolution of PbSO4 into the aqueous solution. In the presence of pyridine or ethanol in the solution, the Jsc decay with time of illumination is reduced due to the suppression of the PbSO4 formation.
|Number of pages||6|
|Journal||Journal of Photochemistry and Photobiology A: Chemistry|
|Publication status||Published - 2001 Oct 1|
- Photocurrent instability
ASJC Scopus subject areas
- Chemical Engineering(all)
- Physics and Astronomy(all)