1. Institute of Electronic Devices; University of Wuppertal; Rainer-Gruenter-Str. 21 42119 Wuppertal Germany
2. College of Materials Science and Engineering; Nanchang University; 999 Xuefu Avenue Nanchang 330031 China
3. College of Chemistry/Institute of Polymers; Nanchang University; 999 Xuefu Avenue Nanchang 330031 China
4. Chair of Large Area Optoelectronics; University of Wuppertal; Rainer-Gruenter-Str. 21 42119 Wuppertal Germany