Sepideh Shirazi - M.Sc. student at Semnan university (Semnan, Iran)
Seyed Mohammad Hosein Jafari - M.Sc. student at Semnan university (Semnan, Iran)

In this work, we used silicon dioxide (SiO۲) boxes under the CIGS layer as rear-passivation and silver as rear contact to improve solar cell efficiency. Silver at the back contact generates a strong junction electric field, facilitating the movement of liberated carriers to electrodes and significantly increasing photocurrent. The efficiency of proposed solar cell is ۱۹.۳۸% which is ۲% better than conventional cell. The short circuit current density (Jsc) of the proposed solar cell has improved by ۴۰% compared to a conventional CIGS solar cell and therefore the performance of the proposed CIGS solar has been improved.

CIGS solar cell, efficiency, rear-passivation, absorber, photon absorption