The research of a new polyoxometalates based photosensitizer on dye sensitized solar cell

Keggin-type polyoxometalates (POMs) based photosensitizer [(CH3)4N]5[PW11O39RhCH2COOH]∙6H2O (PW11Rh-COOH) was firstly explored for assembling the POMs sensitized solar cells (PSSC). Electrochemical measurement, UV–vis diffuse reflectance spectrum, Surface photovoltage spectrum, and X-ray photoelectron spectroscopy demonstrated that PW11Rh-COOH displayed higher photovoltaic response than that of other POMs because of the better visible-light response, energy level matching and higher carrier separation efficiency.