1. Department of Materials Science and Engineering and The Shenzhen Key Laboratory for Printed Organic ElectronicsSouthern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 China
2. Department of ChemistryNorthwestern University 2145 Sheridan Road Evanston IL 60208 USA
3. Department of ChemistryChung‐Ang University Seoul 06974 Republic of Korea
4. Flexterra Corporation 8025 Lamon Avenue Skokie IL 60077 USA