Performance evaluation of tungsten sulphoselenides as a material for non-conventional energy devices

Values of thermal power factor S2/ρ at room temperature and its variation with temperature have been studied for mixed crystals of tungsten dichalcogenides i.e. WSxSe2−x (0 ≤ x ≤ 2) synthesized in single crystal form by a chemical vapour transport technique. Photoelectrochemical (PEC) solar cells have also been fabricated using this material. Various solar cell parameters e.g. open circuit voltage (Voc), short circuit current (Isc), fill factor (FF) and efficiency (η) have been determined for the entire series of WSxSe2−x. All results on thermoelectric and PEC behaviour have been carefully studied and their implications have been thoroughly discussed.