Numerical analysis of CdTe thin film solar cells with CdS:O window layer and ZnO buffer layer

This paper has numerically evaluated the performance of a proposed modified structure of thin film solar cell based on CdS/CdTe. In this proposed cell, conventional CdTe layer has been used as absorber, but a new back contact Ni has been used along with newly introduced 100 nm thick ZnO layer to increase the performance of the conventional solar cell. The feasibility of ultra-thin CdTe absorber layer with newly added CdS:O layer instead of conventional CdS layer has also been examined. It has been found that the proposed ultra-thin cell had conversion efficiency of 21.57% (with Voc = 0.89 V, Jsc = 28.32 mA/cm 2 , and FF = 85.78%). These outcomes have proved the feasibility of the proposed modified CdTe solar cell showing approximately 4.3% more efficiency than the conventional one