1. College of Materials Science and Engineering, Sichuan University, Chengdu 610065, P. R. China
2. Guizhou Anda Technology Energy Co., Ltd., Guiyang 550300, P. R. China
3. Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, Chengdu 610065, P. R. China
4. Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, P. R. China