1 Dr. W. Yin, Prof. Dr. X. Bai, D. Xue, X. Zhuang, H. Song, Prof. Dr. W. W. Yu, State Key Laboratory of Integrated Optoelectronics, and College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012 (P. R. China), baix@jlu.edu.cn, wyu6000@gmail.com.
2 Dr. X. Zhang, Key Laboratory of Mobile Materials MOE, State Key Laboratory of Automotive Simulation and Control, and College of Materials Science, Jilin University, Changchun 130012 (P. R. China).
3 Prof. Dr. W. W. Yu, Department of Chemistry and Physics, Louisiana State University, Shreveport, LA 71115 (USA).