PHOTOELECTRICAL PERFORMANCE OF NANOCRYSTALLINE TIO2 FILM ELECTRODE SENSITIZED BY RU(II)-BIPYRIDINE COMPLEXES

Two kinds of Ru( II )-bipyridine complexes, cis-di(thiocyanate)bis(2, 2'-bipyridyl-4, 4'-dicarboxylate) ruthenium( II ) and cis-di(thiocyana te)bis(2, 2'-bipyridyl-3, 3'-dicarboxylate) ruthenium( II ), were util ized as the sensitizers to the nanocrystalline TiO2 film electrodes. S tudy shows that the two dyes have guile different sensitization proper ties due to the strong steric effect of carboxyl groups. In addition, the pretreatment to nanocrystalline TiO2 film electrodes with TiCl4 wa s investigated, which is an effective way to improve the photoelectric conversion performances of sensitized TiO2 electrodes.