1. College of Physics and Energy, Fujian Normal University, Fuzhou, Fujian 350117, P. R. China
2. College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, P. R. China
3. Fujian Provincial
Engineering Technology Research Center of Solar Energy Conversion
and Energy Storage, Fuzhou, 350117, China
4. Fujian Provincial Collaborative
Innovation Center for Optoelectronic Semiconductors and Efficient
Devices, Xiamen, 361005, China