1. Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage Center Solar Energy Conversion Center Nankai University Tianjin 300350 P. R. China
2. Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Nankai University Tianjin 300350 P. R. China
3. Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Nankai University Tianjin 300350 P. R. China
4. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Nankai University Tianjin 300072 P. R. China