The photoelectrochemical behavior of SnO~2 nanoporous film electrode sensitized from composite PbS/RuL~2(NCS)~2 was investigated by photoelectrochemical methods and UV--vis absorption spectroscopy. The results showed that the photosensitization of composite PbS and Rul~2 (NCS)~2 for SnO~2 nanoporous film elertode largely improved the conversion efficiency of light to electricity and was superior to the photosenitization of PbS or of RuL~2 (NCS)~2 respectively. The charge transfer mechanism of compositely sensitzed electrode was discussed in detail.

Key words: LEAD SULFIDE, TIN DIOXIDE, ULTRAVIOLET SPECTROPHOTOMETRY, RUTHENIUM COMPLEX, BIPYRIDINE P, PHOTOSENSITIZATION, PHOTO-ELECTROCHEMISTRY