1. Institute of Electronic Devices; University of Wuppertal; Rainer-Gruenter-Str. 21 42119 Wuppertal Germany
2. College of Chemistry/Institute of Polymers; Nanchang University; 999 Xuefu Avenue Nanchang 330031 China
3. College of Materials Science and Engineering; Nanchang University; 999 Xuefu Avenue Nanchang 330031 China
4. Department of Chemistry; University of Cologne; Luxemburger Straße 116 50939 Cologne Germany
5. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Hahn-Meitner-Platz 1 D-14109 Berlin Germany