1. Department of Physics Selcuk University Konya 42130 Turkey
2. Department of Metallurgical and Materials Engineering Karamanoglu Mehmetbey University Karaman 70200 Turkey
3. Laboratory of Photovoltaic Cells (PVcells) Karamanoglu Mehmetbey University Karaman 70200 Turkey
4. Scientific and Technological Research and Application Center Karamanoglu Mehmetbey University Karaman 70200 Turkey