A multinary chalcopyrite compound CuInGaSeTe has been investigated and characterized as absorber layer for thin film solar cell material in this work. This work is a collaboration of multidisciplinary departments such as physics, materials science and energy systems science.The basic principles of a photovoltaic device are introduced and then material characteristics have been evaluated as structural, optical, topographical, electrical and also surface properties have been discussed. Special emphasis is laid on the complex fabrication process and its characteristic parameters for applications as PV material.