Abstract

The novel methyl-substituted dicyanovinyl-capped quinquethiophenes <b>1</b>–<b>3</b> led to highly efficient organic solar cells with power conversion efficiencies of 4.8–6.9%. X-ray analysis of single crystals and evaporated neat and blend films gave insights into the packing and morphological behavior of the novel compounds that rationalized their improved photovoltaic performance

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