1. Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy
2. School of Materials & Energy
3. Southwest University
4. Chongqing 400715
5. P. R. China
6. Organic Semiconductor Research Center
7. Chongqing Institute of Green and Intelligent Technology
8. Chinese Academy of Sciences
9. Chongqing
10. China
11. Yunnan Key Laboratory for Micro/Nano Materials & Technology
12. School of Materials and Energy
13. Yunnan University
14. Kunming 650091