1. School of Mechanical Engineering, Dongguan University of Technology, Dongguan 523808, China
2. Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
3. Dongguan Volt-Amp Optoelectronics Technology Co., Ltd., Dongguan 523808, China