Electroluminescence from carbazole dimers

Authors

  • Dr. Danilo B. Romero,

    Corresponding author
    1. Institut de Genie Atomique, Physics Department Swiss Federal Institute of Technology CH-1015 Lausanne (Switzerland)
    • Institut de Genie Atomique, Physics Department Swiss Federal Institute of Technology CH-1015 Lausanne (Switzerland)
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  • Dr. Frank Nüesch,

    1. Institut de Genie Atomique, Physics Department Swiss Federal Institute of Technology CH-1015 Lausanne (Switzerland)
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  • Dr. Tayeb Benazzi,

    1. Université de Paris-Nord Laboratoire de Recherches sur les Macromolecules F-93430 Villetaneuse (France)
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  • Dr. Didier Adès,

    1. Université de Paris-Nord Laboratoire de Recherches sur les Macromolecules F-93430 Villetaneuse (France)
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  • Dr. Alain Siove,

    1. Université de Paris-Nord Laboratoire de Recherches sur les Macromolecules F-93430 Villetaneuse (France)
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  • Prof. Libero Zuppiroli

    1. Institut de Genie Atomique, Physics Department Swiss Federal Institute of Technology CH-1015 Lausanne (Switzerland)
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  • D.B.R. and L.Z. acknowledge the support of the Optics Priority Program of Switzerland. We also thank the Swiss National Foundation for financial assistance of fundamental research.

Abstract

Blue light-emission from a single-layer organic LED (light-emitting diode) based on carbazole dimers is reported. The device fabrication, involving vacuum sublimation of the dimer onto an indium tin oxide covered glass substrate, is described and the source of the electroluminescence elucidated. It is deduced that confined intra-dimer luminescence excitations and a balanced double-charge injection result in a device with good luminance and modest external quantum efficiencies. Of the three primary colors required for full-color display applications, blue has been the most elusive to obtain.

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