1. State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices South China University of Technology 381 Wushan Road Guangzhou 510640 P. R. China
2. School of Materials and Energy Guangdong University of Technology Guangzhou 510006 P. R. China
3. The International School of Advanced Materials School of Material Science and Engineering South China University of Technology Guangzhou 510640 P. R. China
4. Electronic and Communications Department College of Engineering Universiti Tenaga Nasional Kajang Selangor 43000 Malaysia
5. Institute of Sustainable Energy Universiti Tenaga Nasional Kajang Selangor 43000 Malaysia