1. Materials Research Institute and School of Physics and Astronomy
2. Queen Mary University of London
3. London E1 4NS
4. UK
5. State Key Laboratory on Integrated Optoelectronics
6. Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion
7. School of Chemistry and Chemical Engineering
8. Tianjin University of Technology
9. Tianjin 300384
10. P. R. China
11. Materials Research Institute and School of Biological and Chemical Sciences