1. Optoelectronic Convergence Research Center
2. Department of Materials Science and Engineering Chonnam Nation University
3. Gwangju 500-757
4. Republic of Korea
5. Center for Nanomaterials and Chemical Reactions
6. Institute for Basic Science
7. Daejeon 305-701
8. Korea
9. Photovoltaic Laboratory
10. Korea Institute of Energy Research
11. Daejeon 305-343
12. South Korea