1. King Abdullah University of Science and Technology (KAUST), KAUST Solar Center, Thuwal Jeddah 23955-6900, Kingdom of Saudi Arabia
2. Technology Development Center, Metatest Optoelectronic Company Limited, Nanjing, Jiangsu 215000, China
3. Key Laboratory of Material Physics of Ministry of Education, School of Physics and Engineering, Zhengzhou University, Zhengzhou 450052, China