1. Department of Electrical and Electronics EngineeringMugla Sitki Kocman University Kotekli Mugla 48000 Turkey
2. Center for Solar Energy Research and Applications (GUNAM)Middle East Technical University Cankaya Ankara 06800 Turkey
3. School of ElectricalComputer and Energy EngineeringArizona State University Tempe AZ 85287‐5706 USA
4. Department of PhysicsMiddle East Technical University Cankaya Ankara 06800 Turkey