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Flexible conjugated polymer photovoltaic cells with controlled heterojunctions fabricated using nanoimprint lithography

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6 Author(s)
Kim, Myung-Su ; Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 ; Kim, Jin-Sung ; Cho, Jae Cheol ; Shtein, Max
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The authors describe conjugated polymer-based photovoltaic devices in which the shape and area of the interface between the electron donor and acceptor layers were controllably varied using nanoimprint lithography. The short circuit current is shown to increase with the interfacial area of the heterojunction, without affecting the open circuit voltage. The fill factor and power conversion efficiency are also shown to increase with donor-acceptor interfacial area.

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Applied Physics Letters  (Volume:90 ,  Issue: 12 )