1. State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Wushan Road 381 Guangzhou 510640 P. R. China
2. TCL China Star Optoelectronics Technology Company, Ltd. Shenzhen Guangdong 518132 P. R. China
3. Public Laboratory Training Center South China University of Technology Wushan Road 381 Guangzhou 510640 P. R. China