1. Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, 2801 W. Bancroft Street, Toledo, OH, 43606, USA
2. Department of Energy Engineering, Korea Institute of Energy Technology (KENTECH), Naju 522132, Republic of Korea
3. School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
4. Department of Chemical Engineering, Sunchon National University, Suncheon 57922, Republic of Korea
5. School of Materials Science and Engineering, Georgia Institute of Technology, North Ave NW, Atlanta, Georgia 30332, USA
6. Optoelectronics Convergence Research Center and Department of Materials Science and Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
7. Future Agricultural Research Division, Rural Research Institute, Korea Rural Community Corporation, Ansan-si 15634, Republic of Korea