1. College of Energy Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
2. School of Materials, Institute for Solar Energy Systems, Shenzhen Campus of Sun Yat-sen University, No. 66, Gongchang Road, Shenzhen, Guangdong 518107, China
3. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore
4. Sun Yat-sen University (Taizhou), Solar Energy Joint R&D Center, Taizhou, 225300, China