1. Xi'an Key Laboratory of Advanced Photo-electronics Materials and Energy Conversion Device, Xijing University, Xi'an 710123, China
2. Materials Research Laboratory, Department of Physics, Faculty of Sciences (FOS), International Islamic University (IIU), H-10, Islamabad 44000, Pakistan
3. School of Materials Science and Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China
4. Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China
5. Department of Chemistry and Physics, Jackson State University, USA
6. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212114, P. R. China