Tinted and colour-neutral semitransparent organic photovoltaic elements are of interest for building-integrated applications in windows, on glass roofs or on facades. We demonstrate a semitransparent organic photovoltaic cell with a dry-laminated top electrode that achieves a uniform average visible transmittance of 51% and a power conversion efficiency of 3%. The photo-active material is based on a majority blend composed of a visibly absorbing donor polymer and a fullerene acceptor, to which a selective near-infrared absorbing cyanine dye is added as a minority component. Our results show that organic ternary blends are attractive for the fabrication of semitransparent solar cells in general, because a guest component with a complementary absorption can compensate for the inevitably reduced current generation capability of a high-performing binary blend when applied as a thin, semitransparent film. [GRAPHICS] .
Paul Joseph Dyson, Ursula Röthlisberger, Felix Thomas Eickemeyer, Lukas Pfeifer, Virginia Carnevali, Nikolaos Lempesis, Lorenzo Agosta, Masaud Hassan S Almalki, Haizhou Lu, Yeonju Kim, Jaeki Jeong
Christophe Ballif, Aïcha Hessler-Wyser, Antonin Faes, Jacques Levrat, Gianluca Cattaneo, Fahradin Mujovi, Umang Bhupatrai Desai, Matthieu Despeisse
Mohammad Khaja Nazeeruddin, Peng Gao, Paramaguru Ganesan