Authors : Najmodin Shahverdi, Ali Dinarvand and Mohammad Reza Amini
Abstract: The aim of doing this research is to study and optimize the parameters I-V and increase the efficiency of solar cell of CIGS which is a proper substitute for fossil fuels. This solar cell is a combination of solution of Cu-Indium-Selenide (CIG) and Cu-Gallium-Selenide (CGS) which is a kind of semi-conductor of I-III-VI2 that due to the high stability and the direct band gap Energy (Eg) is one of the most proper substitutes for silicon solar cell, also among other solar cells of thin layer, it has higher efficiency and lower price. In order to realize the aim of the research, optically modeling and simulating the solar cells based on thin band of Cu(In,Ga)Se2 (CIGS) was done by using of Silvaco and AMPS software. Therefore, the methods of increasing the efficiency of solar cells of CIGS through improving the thickness of absorbent layer and changing in impurity of absorbent layer and adding another absorbent layer (Molybdinum) and changing in band gap Energy (Eg) of absorbent layers up to reach to the optimum point were studied. According to the gained results, the efficiency of 32% of solar cells of CIGS with minimum effectiveness on other parameters was gained and a solar cell of CIGS with optimum structure was created. By gaining the result of similar simulation by using of AMPS and SILVACO software, this result was gained that this solar cell practically is constructible and reliable. Achieving this efficiency can be a turning-point for more attention of generators of solar cells to this kind of solar cell.
Najmodin Shahverdi, Ali Dinarvand and Mohammad Reza Amini, 2020. Parameter Optimization and Efficiency Improvement of Cu(In, Ga)Se2 (CIGS) Solar Cells. International Journal of Signal System Control and Engineering Application, 13: 157-166.