Advanced Materials

Rubrene/Fullerene Heterostructures with a Half-Gap Electroluminescence Threshold and Large Photovoltage

Authors

  • A. K. Pandey,

    1. Equipe de Recherches Cellules Solaires Photovoltaïques Plastiques, Laboratoire POMA, UMR-CNRS 6136, Université d'Angers, 2 Bd Lavoisier, 49045 Angers (France)
    2. Organic Semiconductor Centre, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9SS (UK)
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  • J.-M. Nunzi

    1. Departments of Chemistry and Physics, Queen's University, Kingston K7L 3N6, ON (Canada)
    2. Equipe de Recherches Cellules Solaires Photovoltaïques Plastiques, Laboratoire POMA, UMR-CNRS 6136, Université d'Angers, 2 Bd Lavoisier, 49045 Angers (France)
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  • We thank David Vaufrey and Henri Doyeux from Thomson R&D France, Research & Innovation, Rennes, for their help in EL characterization. Financial support was obtained from the Agence Nationale pour la Recherche (ANR) under the solar photovoltaic program NANORGYSOL. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

Light and current generation functions from a rubrene/fullerene heterostructure are integrated into an efficient organic dual device (see figure). Electroluminescence, with the characteristic rubrene color, has a turn-on voltage less than 1 V. Solar-power conversion efficiency reaches 3 % with a 5.3 mA cm–2 short-circuit current density and almost 1 V open- circuit voltage under AM 1.5 illumination. The half-bandgap electroluminescence turn-on voltage is interpreted as an Auger fountain effect.

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