چكيده به لاتين
Chalcopyrite solar cells are the second generation of solar cells. In recent years, many studies have been carried out on chalcopyrite solar cells and many efforts have been made to improve their performance. One of the factors that can influence the performance of chalcopyrite solar cells is the roughness of the surface of the various layers, which not enough research has been done on them. Also, optimizing the thickness of the CIGS absorbent layer can greatly affect the performance of chalcopyrite solar cells and, in addition, reduces its cost of production. Therefore, the aim of this thesis is to investigate the effect of thickness and roughness of the surface of the CIGS absorbent layer on the efficiency of chalcopyrite solar cells using FDTD simulation method and the Lumerical software. In this research, the absorption behavior of the CIGS layer is investigated under different thicknesses and roughness, and the results and diagrams are presented in the following.
In this study, the thickness of the CIGS absorbent layer was optimized and by creating a random rough surface, the absorbance of the CIGS layer in terms of effective roughness (Sigma RMS) and correlation length (Lc) was obtained. The results show that the thickness of 1500 nm for the CIGS absorbent layer can be an optimized value, and by optimizing the effective roughness and the correlation length (Lc), an absorption of about 99% can be achieved.
Keywords: Chalcopyrite solar cell, FDTD simulation, Thickness of the CIGS absorbent layer, Surface Roughness, absorption.
