1. School of Materials Science and Engineering, Anhui University, Hefei 230601, China
2. School of Physics and Materials Engineering, Hefei Normal University, Hefei 230601, China
3. School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230601, China
4. School of Science, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
5. Key Laboratory for Photoelectric Detection Science and Technology of Education Department of Anhui Province, Hefei Normal University, Hefei 230601, China