Influences of solvents on morphology, light absorbing ability and photovoltaic performance of Sb_2S_3-sensitized TiO_2 photoanodes by chemical bath deposition method

摘要

Sb_2S_3-sensitized TiO_2 films were prepared with chemical bath deposition (CBD) method. The influences of acetone and acetic acid solvents on the morphologies of Sb_2S_3-sensitized TiO_2 films and their light absorbing ability were investigated. Furthermore, photoelectrochemical solar cells containing Sb_2S_3-sensitized TiO_2 photoanodes, poly-aniline, and Pt counter electrodes were prepared to investigate the photovoltaic performance of these Sb_2S_3-sensitized TiO_2 films. It was found that the Sb_2S_3-sensitized TiO_2 photoanode prepared with CBD method in the solution containing acetic acid showed higher light absorption in short-wavelength region, lower charge transfer resistance and longer electron lifetime compared with that of the one prepared with CBD method in the solution containing acetone, resulting in better photovoltaic performance.