Investigating the role of new ZnMgO buffer layer in CMTS thin film solar cell structure through advanced modeling

چکیده مقاله

Solar cells based on CMTS (Cu2MnSnS4) absorbers are made of low-cost, non-toxic and stable elements on the Earth's surface and are widely studied for their high efficiency. CMTS compound is a semiconductor with a symmetrical Stenite structure. Considering the alignment of the energy bands in the structure of the solar cell, it is very important to achieve a buffer layer with a high transmission coefficient, an optimal bandgap and a suitable lattice matching. For the first time, the role of ZnMgO buffer layer thickness in Mo/CMTS/ZnMgO/ZnO/ ZnO:Al solar cell structure was investigated through 1D SCAPS modeling. The analysis of the results indicates that the thickness of this buffer layer is optimal at 75 nm. The values obtained from the I-V analysis indicate the achievement of VOC = 0.91 V, Jsc = 40.83 (mA/cm2), FF = 70.24 (%) and Eff = 26.2 (%). The above results provide essential baselines and practical directions for the fabrication of high-efficiency CMTS absorber layer-based photovoltaic cells.