1. Hong Kong University of Science and Technology‐Shenzhen Research Institute No. 9 Yuexing first RD, Hi‐tech Park, Nanshan Shenzhen 518057 P. R. China
2. Department of Chemistry Guangdong‐Hong Kong‐Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials Energy Institute and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong
3. Department of Physics and Organic and Carbon Electronics Laboratories (ORaCEL) North Carolina State University Raleigh NC 27695 USA
4. School of Physics and Astronomy and Collaborative Innovation Center of IFSA (CICIFSA) Shanghai Jiao Tong University Shanghai 200240 P. R. China
5. College of Chemistry and Chemical Engineering Central South University Changsha 410083 P. R. China
6. Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology (SCUT) Guangzhou 510640 P. R. China