1. School of Energy Science and Engineering; University of Electronic Science and Technology; Chengdu Sichuan 611731 P. R. China
2. State Key Laboratory of Electronic Thin Films and Integrated Devices; University of Electronic Science and Technology; Chengdu 611731 P. R. China
3. Department of Electrical Engineering; Sukkur Institute of Business Administration; Sukkur 65200 Pakistan
4. Texas Materials Institute; ETC 9.102; The University of Texas at Austin; Austin TX 78712 USA
5. Shenzhen Li-S Technology Co., Ltd.; Shenzhen P. R. China
6. Sichuan Alpha Scenery and Green Energy Co., Ltd.; P. R. China