Javad Karamdel - Electronics Department, Faculty of Engineering, Islamic Azad University- South Tehran Branch, Iranj-karamdel@azad.ac.ir
Bita Farhadi - Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University- Kermanshah Branch, Iran

The structure and performance parameters of a triple junction InGaP/GaAs/Ge solar cell including a CdS antireflection top layer are studied and optimized using Silvaco ATLAS software to obtain maximum possible value of efficiency .At first multi-junction solar cells with high efficiency are designed for specific applications like satellites and spatial discovering, but currently, they are the lowest cost selection for using in Terrestrial concentrator. Moreover, photovoltaic is a technology and research area that is related to the solar cells application in a electricity generation for practical using, where an optimum efficiency of ۴۲.۸۱% is achieved.

Electricity,Photovoltaic, solar cells, Fill factor,multi-junction