The initial absorber layer thickness is 0.5 µm. In this part of the study, the cell is simulated to optimize the output performance of the cell. that open circuit voltage and fill factor have an inverse relationship with thickness while short circuit current is increasing with the thickness increment of the absorber layer. However, efficiency is initially increasing while the thickness was lower but it is decreasing again due to the enhancement of thickness. Here ideal thickness for the absorber is 0.275 µm and the cell can provide a maximum efficiency of 23.43% at this thickness of the absorber.