Organic Light-Emitting Diodes Based on Poly(9,9-dioctylfluorene-co-bithiophene) (F8T2)

Authors

  • Peter A. Levermore,

    1. Experimental Solid State Physics Group, Blackett Laboratory Imperial College London, Prince Consort Road London SW7 2BZ (UK)
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  • Rui Jin,

    1. Experimental Solid State Physics Group, Blackett Laboratory Imperial College London, Prince Consort Road London SW7 2BZ (UK)
    2. Electronic Materials Group, Department of Chemistry Imperial College London London SW7 2AZ (UK)
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  • Xuhua Wang,

    1. Experimental Solid State Physics Group, Blackett Laboratory Imperial College London, Prince Consort Road London SW7 2BZ (UK)
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  • John C. de Mello,

    1. Electronic Materials Group, Department of Chemistry Imperial College London London SW7 2AZ (UK)
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  • Donal D. C. Bradley

    Corresponding author
    1. Experimental Solid State Physics Group, Blackett Laboratory Imperial College London, Prince Consort Road London SW7 2BZ (UK)
    • Experimental Solid State Physics Group, Blackett Laboratory Imperial College London, Prince Consort Road London SW7 2BZ (UK).
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Abstract

A study of the optical properties of poly(9,9-dioctylfluorene-co-bithiophene) (F8T2) is reported, identifying this polymer as one that possesses a desirable combination of charge transport and light emission properties. The optical and morphological properties of a series of polymer blends with F8T2 dispersed in poly(9,9-dioctylfluorene) (PFO) are described and almost pure-green emission from light emitting diodes (LEDs) based thereon is demonstrated. High luminance green electroluminescence from LEDs using only a thin film of F8T2 for emission is also reported. The latter demonstration for a polymer previously primarily of interest for effective charge transport constitutes an important step in the development of emissive materials for applications where a union of efficient light emission and effective charge transport is required.

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