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. China
6. Institute of Polymer Optoelectronic Materials and Devices
7. State Key Laboratory of Luminescent Materials and Devices
8. South China University of Technology
9. Guangzhou 510640