1. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province
2. College of Optoelectronic Engineering
3. Shenzhen University
4. Shenzhen 518060
5. P. R. China
6. Department of Chemistry
7. KTH Royal Institute of Technology
8. 10044 Stockholm
9. Sweden
10. Department of Applied Biology and Chemical Technology
11. The Hong Kong Polytechnic University
12. Hung Hom