1. Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials Nanjing University of Posts & Telecommunications Nanjing 210023 China
2. Xuzhou Jiuqiang Testing Technology Co. Ltd Xuzhou 221000 China
3. Shaanxi Institute of Flexible Electronics Northwestern Polytechnical University Xi'an 710072 China