1. School of Materials and Energy, National Center for International Research on Photoelectric and Energy Materials, Yunnan University, Kunming 650091, PR China
2. Yunnan Radio Co. Ltd., Kunming 650033, PR China
3. Advanced Analysis and Measurement Center of Dali University, Dali 671200, PR China
4. Yunnan Security and Technology Co. Ltd., Kunming 650033, PR China