Improvement in carrier mobility and photovoltaic performance through random distribution of segments of linear and branched side chains

0349040 - ÚMCH 2011 RIV GB eng J - Journal Article
Egbe, D. A. M. - Adam, G. - Pivrikas, A. - Ramil, A. M. - Birckner, E. - Cimrová, Věra - Hoppe, H. - Sariciftci, N. S.
Improvement in carrier mobility and photovoltaic performance through random distribution of segments of linear and branched side chains.
Journal of Materials Chemistry. Roč. 20, č. 43 (2010), s. 9726-9734. ISSN 0959-9428
R&D Projects: GA MŠMT(CZ) 1M06031
Institutional research plan: CEZ:AV0Z40500505
Keywords : poly(p-phenylene-ethynylene)-alt-poly(p-phenylene-vinylene) * solar cells * charge carrier mobility
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 5.101, year: 2010

The random distribution of segments of linear octyloxy side chains and of branched 2-ethylhexyloxy side chains, on the backbone of anthracene containing poly(p-phenylene-ethynylene)-alt-poly(p-phenylene-vinylene) (PPE-PPV) has resulted in a side chain based statistical copolymer, denoted AnE-PVstat, showing optimized features as compared to the well defined homologues whose constitutional units are incorporated into its backbone. Electric field independent charge carrier mobility (µhole) for AnE-PVstat as demonstrated by CELIV and OFET measurements is predominantly an intrachain process and less an interchain one, which is in line with past photoconductivity results from PPE-PPV based materials. The present side chain distribution favors efficient solar cell active layer phase separation. As a result, a smaller amount of PC60BM is needed to achieve relatively high energy conversion efficiencies above 3%.
Permanent Link: http://hdl.handle.net/11104/0006070