Inhaltszusammenfassung

High-molecular weight anthracene containing poly(p-phenylene-ethynylene)-alt-poly(p-phenylene-vinylene) (PPE-PPV) copolymers bearing linear and/or branched alkyl side chains have been synthesized and investigated for use in polymer-fullerene bulk heterojunction solar cells. By variation of the nature and length of alkyl side chains the ordering in thin films could be tuned. Besides the basic photophysical characterization, small-angle X-ray scattering on extruded fibers and cyclovoltammetry m...High-molecular weight anthracene containing poly(p-phenylene-ethynylene)-alt-poly(p-phenylene-vinylene) (PPE-PPV) copolymers bearing linear and/or branched alkyl side chains have been synthesized and investigated for use in polymer-fullerene bulk heterojunction solar cells. By variation of the nature and length of alkyl side chains the ordering in thin films could be tuned. Besides the basic photophysical characterization, small-angle X-ray scattering on extruded fibers and cyclovoltammetry measurements are reported. The photovoltaic characterization indicates that improved ordering clue to linear side chains on the arylene-ethynylene segment as well as lower side-chain volume fraction yield higher photocurrents. Power conversion efficiencies of nearly 2.5% are reported for the best devices with a polymer:fullerene composition of 1:1 by weight. [GRAPHICS] IV-characteristics of partly optimized photovoltaic devices based on [6,6]-phenyl C(61) butyric acid methyl ester (PCBM) blends with a blending ratio of 1:1 under solar simulator illumination. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim » weiterlesen» einklappen

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DDC Sachgruppe:
Allgemeines, Wissenschaft