Simulation Study of High Conversion Efficiency of CdS/CIGS Solar Cell

Abstract

A high efficiency CIGS/CdS solar cell is designed including an intrinsic CIGS layer and a highly doped CIGS as a Graded p-type layer. The designed cell is simulated using industrial grade software SILVACO. With the combination of TCO layer (ZnO), CdS window layer, CIGS Intrinsic layer, the higher conversion efficiency is achieved which is about 20.94%. After introducing graded p-type layer efficiency increased by great extent. In addition to this, with the increase of thickness of intrinsic layer efficiency also increased. At AM 1.5 solar radiation, the proposed cell structure had a Voc of 0.726V, a Jsc of 57.72mAcm-2, a maximum power is 35.27mW/cm2 and a fill factor of 84%, corresponding to an overall efficiency of 29.69%.