1. Department of Materials Science and Engineering, Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG), Southern University of Science and Technology, No.1088, Xueyuan Road, Shenzhen 518055, Guangdong, China
2. Department of Physics, Chongqing University, No.55, University City South Road, Chongqing 401331, China
3. Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong SAR, China