1. Department of Materials Science and Engineering and Optoelectronics Convergence Research Center
2. Chonnam National University
3. Gwangju 500-757
4. South Korea
5. Department of Physics and Astronomy and Wright Center for Photovoltaic Innovation and Commercialization
6. University of Toledo
7. Toledo
8. USA
9. School of Electrical Engineering and Computer Science
10. Gwangju Institute of Science and Technology
11. Gwangju 61005
12. School of Energy Engineering
13. Kyungpook National University
14. Daegu
15. Republic of Korea
16. Department of Chemistry Education and Optoelectronics Convergence Research Center