Ashrafalsadat Mirkamali - Department of Science and Engineering, Behshahr Branch, Islamic Azad University, Behshahr, Iran
Khikmatkhalimovich Muminov - Physical-Technical Institute named after S.U.umarov, academy of Sciences of the Republic of Tajikistan, Dushanbe, Tajikistan.

Researchers in the field of simulation have been mainly interested in the question of how to increase the efficiency of solar cells. Therefore this study aimed to investigate CdS/CdTe solar cells by applying AMPS-۱D software. The impact of semiconductor layers thickness on the output parameters of the CdS/CdTe solar cell is being analyzed and studied carefully, for example, fill factor, efficiency, the density of short-circuit current and open circuit voltage. To acquire the most efficiency estimation, a new tandem multi-junction structure is intended by using two solar cells connected back to back with each other and designed based on the results gained from the single-junction solar cells. Numerical simulations demonstrated that the highest CdS/CdTe efficiency is ۳۱.۸% which can be achieved whenever the p-CdS layer thickness is equal to ۵۰ nm, and the n-CdS layer thickness is equal to ۲۰۰ nm, while the thicknesses of the n-CdTe layer and p-CdTe layer are kept fixed equal to ۳۰۰۰ nm and ۱۰۰۰ nm, respectively

tandem solar cell, Efficiency, Thickness, optimum, Simulation