1. Sungkyunkwan University, Department of Energy Science, Suwon, 440-746, Republic of Korea
2. Sungkyunkwan University, College of Information and Communication Engineering 440-746, Republic of Korea
3. Korea Institute of Energy Research (KIER), Solar Energy Department, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea
4. Sungkyunkwan University, Department of Energy Science, Suwon, 440-746, Republic of KoreabSungkyunkwan University, College of Information and Communication Engineering 440-746, Republic of Korea