1. Department of Physics, Recep Tayyip Erdogan University, 53100 Rize, Turkey
2. Faculty of Science, Department of Physics, Akdeniz University, 07058 Antalya, Turkey
3. Department of Physics, Middle East Technical University, 06800 Ankara, Turkey
4. Center of Solar Energy Research and Applications (GÜNAM), Middle East Technical University, 06800 Ankara, Turkey
5. Institute of Nuclear Sciences, Hacettepe University, 06800 Ankara, Turkey