1. Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, China
2. Jiangsu−Singapore Joint Research Center for Organic/Bio Electronics & Information Displays, 9 Wenyuan Road, Nanjing 210046, China
3. School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
4. Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore