High efficiency ultrathin CdTe film is an excellent candidate for reliable,\nefficient, stable and low cost solar cells. In this paper, a high efficiency CdS/CdTe\nsolar cell has been studied by using ADEPT 1D simulation tool. The proposed device\nhas been simulated with a reduced CdTe absorber layer thickness and a ZnTe\nlayer as back surface field (BSF) which substantiates sensible energy conversion\nefficiency. The investigation into the simulation results showed that the conversion\nefficiency with BSF layer and 1 �¼m thick CdTe absorber is 8.24% more as compared\nto the conventional CdTe cells (without BSF layer). Reduction of minority carrier\nrecombination loss due to the insertion of BSF layer at the back contact in ultrathin\nCdS/CdTe cells has also been investigated. The results depict that CdTe cell\nwith BSF layer is responsible for increasing the quantum efficiency. However, the\nproposed structure of ZnO/CdS/CdTe/ZnTe demonstrates the highest efficiency of\n24.66% (Voc = 946.51 mV, Jsc = 34.40 mA/cm2 and FF = 75.72%) under global AM1.5G\nillumination spectra.
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