Inverted Semi‐transparent Polymer Solar Cells with Transparency Color Rendering Indices approaching 100 |
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Authors: | Jens Czolk Andreas Puetz Dimitar Kutsarov Manuel Reinhard Uli Lemmer Alexander Colsmann |
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Institution: | Light Technology Institute and Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), Engesserstrasse 13, 76131 Karlsruhe, Germany |
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Abstract: | Window‐ or building‐integrated semi‐transparent solar cells are particularly interesting applications for organic photovoltaic devices. In this work, we present an easy‐to‐process inverted device architecture comprising fully solution processable poly(3,4‐ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) bilayer top‐electrodes for efficient semi‐transparent organic solar cells. By incorporating dyes with a complementary absorption to the light harvesting polymer poly9‐(1‐octylnonyl)‐9H‐carbazole‐2,7‐diyl]‐2,5‐thiophenediyl‐2,1,3‐benzothiadiazole‐4,7‐diyl‐2,5‐thiophenediyl] (PCDTBT) into the PEDOT:PSS electrode, we achieve fully color neutral transparency perception and a color rendering index approaching 100. This makes the devices suitable for applications such as window shadowing or the integration into overhead glazing. |
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Keywords: | polymer solar cell organic photovoltaics semi‐transparent color perception color rendering |
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