1. National Laboratory for Infrared Physics; Shanghai Institute of Technical Physics; Chinese Academy of Sciences; Shanghai 200083 P. R. China
2. University of Chinese Academy of Sciences; Beijing 100049 P. R. China
3. Key Laboratory of Photobiology; Institute of Botany; Chinese Academy of Sciences; Beijing 100093 P. R. China
4. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; Faculty of Physics and Electronic Science; Hubei University; Wuhan Hubei 430062 P. R. China
5. Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering; Changzhou 213164 P. R. China