Abstract
SnS is a promising nontoxic and earth-abundant material suitable for photovoltaic applications. Photovoltaic solar cells based on tin sulphide absorbers have been analysed by using Solar Cell Capacitance Simulator software. The photovoltaic cell consists of SnS absorber layer, CdS as buffer and ZnO as optical window following the sequence p-SnS/CdS/ZnO. After optimization of different parameters and layer thicknesses a maximum efficiency of 10.6%, VOC of 0.92V, JSC of 13.4mA/cm2 and Fill Factor of 86.3% were reached. Simulation studies by varying several solar cell parameters such as thickness of various layers reveal that increasing the thickness of absorber layer results in higher efficiency. The concentration of shallow acceptors in the SnS has a crucial effect in the conversion efficiency, which rises up to about 15% for acceptor concentrations of 1019cm−3. The effect of the compensation ratio between donors and acceptors was also analysed but its effect on conversion efficiency is insignificant.
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