1. BT Convergence Technology Research
Department, ETRI, Daejeon 305-700, Korea
2. Konkuk University-Fraunhofer
ISE Next Generation Solar Cell Research Center, Konkuk University, Seoul 143-701, Korea
3. Department of Chemistry, Yeungnam University, Gyeongsan City, Gyeong-buk 712-749,
Korea
4. Department of Advanced
Materials
Chemistry, 2511 Sejong, Korea University, Sejong 339-700, Korea