A novel route for synthesis, characterization of molybdenum diselenide thin films and their photovoltaic applications

Molybdenum diselenide thin films were deposited by chemical method. The precursor solution contains ammonium molybdate, sodium selenosulphite with hydrazine hydrate as a reducing agent. Various preparative conditions were optimized for the formation of thin films. The X-ray diffraction pattern shows that thin films have a layer-hexagonal phase. EDAX analysis shows that the films are nearly stoichiometric of Mo: Se: 1:2. Optical properties show a direct band gap nature with band gap energy 1.43 eV and having specific electrical conductivity in the order of 10(-5) (Omega cm)(-1). The configuration of fabricated cell is n-MoSe2 | NaI (2 M) + I-2 (1 M) | C (graphite). The photoelectrochemical characterization of the films is carried out by studying current-voltage characterization, capacitance-voltage and power output characteristics. The fill factor and efficiency of the cell were found to be 34.22 and 1.01 % respectively.