1. Optoelectronics Convergence Research Center, Chonnam National University, Gwangju 61186, Republic of Korea
2. Department of Materials Science and Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
3. School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
4. R&D Center, Soctra Co. Ltd., 322, Tera Tower, 167, Songpa-daero, Songpa-gu, Seoul 05855, Republic of Korea
5. Applied Quantum Materials Laboratory (AQML), Department of Physics, Khalifa University of Science and Technology, 127788 Abu Dhabi, United Arab Emirates
6. School of Materials Science and Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
7. Solar Energy R&D Department, Green Energy Institute, Mokpo 58656, Republic of Korea