Design and Computational Simulation of CZTS-Based Solar Cell Using SCAPS-1-D Software

The direct energy band gap of around 1.4–1.6 eV and greater absorption coefficient of the order of 104 cm−1 make CZTS as one of the best materials for solar cell. Here we have performed the numerical modelling and computational simulation with the help of SCAPS-1-D software to investigate the performance of solar cell. In the present work we have studied the effect of variation of the absorber layer (CZTS) thickness from 0.5 to 2 μm with buffer layer thickness constant at 0.05 μm at temperature of 300 K and under “AM 1.5 spectrum” on electrical parameters such as open circuit voltage (VOC), short circuit current (ISC), fill factor (FF) and efficiency (eta). It is observed that the electrical parameters are greatly affected by the variation in the thickness of absorber layer. The efficiency of solar cell gets decreased with increase in temperature. At best simulated parameter (2 μm absorber layer, 0.05 buffer layer, 300 K operating temperature and at “AM 1.5 sun spectrum”) the efficiency was found to be 28.54%. This result can be considered extremely useful in fabrication of thin film CZTS solar cell.