1. College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Shaanxi Xian 710021, China
2. Technological Institute of Materials and Energy Science (TIMES), Xi’an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device, School of Electronic Information, Xijing University, Xi’an 710123, People’s Republic of China
3. Department of Physics, “Alexandru Ioan Cuza” University of Iasi, Carol I Blvd., Iasi 700506, Romania