1. Optoelectronics Convergence Research Center and Department of Materials Science and Engineering, Chonnam National University, Gwangju 61186, South Korea
2. School of Photovoltaic and Renewable Energy Engineering, UNSW Sydney, New South Wales 2052, Australia
3. SCOTRA Corporation, R&D Center, Seoul 05855, South Korea
4. Future Agricultural Research Division, Rural Research Institute, Korea Rural Community Corporation, Ansan-si 15634, South Korea