Solution-processed bilayer photovoltaic devices with nematic liquid crystals |
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Authors: | Manea S AlKhalifah Chunhong Lei Steven A Myers Stuart P Kitney |
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Institution: | 1. Department of Physics and Mathematics, University of Hull, Hull, UK;2. Department of Chemistry, University of Hull, Hull, UK |
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Abstract: | The cross-linking of polymerisable liquid crystalline semiconductors is a promising approach to solution-processable, multilayer, organic photovoltaics. Here we demonstrate an organic bilayer photovoltaic with an insoluble electron-donating layer formed by cross-linking a nematic reactive mesogen. We investigate a range of perylene diimide (PDI) materials, some of which are liquid crystalline, as the overlying electron acceptor layer. We find that carrier mobility of the acceptor materials is enhanced by liquid crystallinity and that mobility limits the performance of photovoltaic devices. |
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Keywords: | liquid crystals photovoltaics bilayer cross-linking reactive mesogen perylene bulk heterojunction |
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