1. Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou Guangdong 510640 China
2. Institute of Biological Information Processing Bioelectronics IBI‐3 Forschungszentrum Jülich Jülich 52425 Germany
3. Faculty of Electrical Engineering and Information Technology Institute of Materials in Electrical Engineering 1 RWTH Aachen University Aachen 52074 Germany