1. School of Precision Instrument and Optoelectronics Engineering
2. Tianjin University
3. Tianjin 300072
4. P. R. China
5. Tianjin Key Laboratory of Film Electronic and Communication Devices
6. School of Electronics Information Engineering
7. Tianjin University of Technology
8. Tianjin 300384
9. Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
10. School of Chemistry & Chemical Engineering