Karwan Wasman from Kurdistan Region-Iraq. Asst Prof at Salahaddin University-Erbil, 44002 Erbil, Kurdistan Region-Iraq since 2010. His PhD has been received at the University of Malaya, KL, Malaysia. Current research interests are Dye-Sensitized Photosensor, organic device physics, semiconducting polymers, and organic materials. His research activities mainly involved the fabrication and characterization of organic solar photovoltaic devices, Perovskite Solar Cells, and Organic Humidity Sensors.