Berlin 2012 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 58: Focus Session: Structure and Transport in Organic Photovoltaics III (jointly with CPP)

HL 58.7: Vortrag

Mittwoch, 28. März 2012, 16:30–16:45, ER 270

Effect of AnE-PV copolymer blending on photophysical and photovoltaic properties — •Christian Kästner¹, Stefan Türk², Daniel Ayuk Mbi Egbe³, Christoph Ulbricht³, Öslem Usluer^3,4, Silke Rathgeber⁵, and Harald Hoppe¹ — ¹Institute of Physics and Institute of Micro- and Nanotechnologies, Ilmenau University of Technology, Ilmenau, Germany — ²Institute for Print and Media Technology, Chemnitz University of Technology, Chemnitz, Germany — ³Linz Institute for Organic Solar Cells, Johannes Kepler University Linz, Austria — ⁴Department of Chemistry, Mugla University, Mugla, Turkey — ⁵Institute of Integrated Natural Science, University Koblenz-Landau, Koblenz, Germany

Abstract: Investigations on the effect of side-chain variation of anthracene-containing poly(p-phenylene-ethynylene)-alt-poly(p-phenylene-vinylene) (PPE-PPV) copolymers (AnE-PVs) showed promising results for the design of bulk heterojunction solar cells. Furthermore, statistical side-chain substitution of these AnE-PVs resulted in an increased solar cell performance. Thus, the question arose whether these results are similarly achievable by blending of different copolymers bearing different side-chain substitutions, instead of side-chain blending of only one polymer backbone. This concept has been applied to fabricate bulk heterojunction solar cells by blending mixtures of copolymers with PCBM within a common solution. It is shown that this concept is beneficial for the solar cell performance compared to single polymer based donor-acceptor blends.