1. Institute for Solar Energy Systems Guangdong Provincial Key Laboratory of Photovoltaic Technology School of Physics Sun Yat-sen University Guangzhou 510006 China
2. School of Materials Sun Yat-Sen University Guangzhou 510275 China
3. Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials Department of Physics Jinan University Guangzhou Guangdong 510632 China
4. State Key Laboratory of Optoelectronic Materials and Technologies Nanotechnology Research Center School of Materials Science and Engineering Sun Yat-Sen University Guangzhou 510275 China
5. State Key Laboratory of Optoelectronic Materials and Technologies School of Physics Sun Yat-Sen University Guangzhou 510275 China
6. Institute of New Energy Technology College of Information Science and Technology Jinan University Guangzhou 510632 China