1. School of Integrated Technology
2. Gwangju Institute of Science and Technology
3. Gwangju 61005
4. Republic of Korea
5. Optoelectronic Convergence Research Center
6. Department of Materials Science and Engineering
7. Chonnam National University
8. Gwangju 61186
9. School of Photovoltaic and Renewable Energy Engineering
10. University of New South Wales
11. Sydney
12. Australia
13. School of Electrical Engineering and Computer Science