1. Department of Materials Science and Engineering, Nanotechnology Research Center (ERNAM) Erciyes University, Kayseri 38039, Turkey
2. Department of Metallurgical and Materials Engineering, Muğla Sıtkı Koçman University, Muğla 48000, Turkey
3. Center for Solar Cell Research and Applications (GUNAM), Department of Physics, Middle East Technical University, 06800 Ankara, Turkey
4. iTechSolar, Middle East Technical University Technopark, 06800 Ankara, Turkey
5. UNAM − Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey