1. International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing, Guangdong 526238, People’s Republic of China
2. Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, People’s Republic of China
3. Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia
4. Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw 02-106, Poland