Mohammad Ghaffar Faraj is Associate Professor at the Department of Physics, Koya University. He received his B.Sc. and M.Sc. degrees in physics, both from the University of Al-Mustansiriya, Iraq, in 2001 and 2004, respectively. He received his Ph.D. degree ( Polymer Solar Cells) in 2012 from the School of Physics; University Sains Malaysia (USM), Malaysia .He achieved Post-doctorate Fellow (PDF) from University of Santiago de Compostela (USC), Spain and completed his project in the field of Polymer Thin Film in 2017. He has been published 18 papers in the ISI journals and 11 papers in International journals. He participated in many international conferences (7 papers) and workshops. His research interests include solar cells, thin films , polymers, and photodetectors heterojunction.