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Outstanding Short-Circuit Currents in BHJ Solar Cells Based on NIR-Absorbing Acceptor-Substituted Squaraines


  • Financial support by the DFG within priority program “Elementary processes of Organic Photovoltaics” is gratefully acknowledged. U.M. thanks the Fonds der Chemischen Industrie for a Ph.D. scholarship. BHJ=bulk heterojunction.


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Current affairs: Acceptor-substituted squaraines exhibit unprecedented short-circuit current density of up to 12.6 mA cm−2 in small-molecule-based solution-processed bulk heterojunction (BHJ) solar cells (see picture). These values are closing the gap to polymer solar cells and together with the NIR absorption of the new cells may lead to wide applications.