1 Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan.
2 Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Sauvage Center for Molecular Sciences, Wuhan University, Wuhan, China.
3 Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), School of Science, Technische Universität Dresden, Dresden, Germany.
4 Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St. Andrews, United Kingdom.