Modelling of novel-structured copper barium tin sulphide thin film solar cells

In this work, a novel structured Cu _2 BaSnS _4 ( CBTS)/ZnS/Zn(O,S) photovoltaic device is proposed. A nontoxic, earth-abundant and auspicious quaternary semiconductor compound copper barium tin sulphide ( Cu_2 BaSnS_4 ) is used as an absorber layer. We propose a novel Zn(O,S) buffer layer for a high-power conversion efficiency (PCE) of CBTS -based thin film photovoltaic cells. Solar cell capacitance simulator software is used for device modelling and simulations are performed under a 1.5 AM illumination spectrum. The proposed device is investigated by means of numerical modelling and optimized the parameters to maximize its efficiency. Promising optimized functional parameters had been achieved from the proposed structure with back surface field layer with a PCE of 18.18