1. Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou P.R. China
2. Innovation Center for Printed Photovoltaics South China Institute of Collaborative Innovation Dongguan P.R. China
3. Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong
4. School of Energy and Environmental Science City University of Hong Kong Kowloon Hong Kong