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Highly Efficient White Polymer Light-Emitting Diodes Based on Nanometer-Scale Control of the Electron Injection Layer Morphology through Solvent Processing

Authors

  • Yong Zhang,

    1. Department of Materials Science and Engineering University of Washington Box 352120, Seattle, WA 98195 (USA)
    2. Institute of Advanced Materials and Technology University of Washington Seattle, WA 98195 (USA)
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  • Fei Huang,

    1. Department of Materials Science and Engineering University of Washington Box 352120, Seattle, WA 98195 (USA)
    2. Institute of Advanced Materials and Technology University of Washington Seattle, WA 98195 (USA)
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  • Yun Chi,

    1. Department of Chemistry National Tsing Hua University Hsin-Chu (Taiwan)
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  • Alex K.-Y. Jen

    Corresponding author
    1. Department of Materials Science and Engineering University of Washington Box 352120, Seattle, WA 98195 (USA)
    2. Institute of Advanced Materials and Technology University of Washington Seattle, WA 98195 (USA)
    • Department of Materials Science and Engineering University of Washington Box 352120, Seattle, WA 98195 (USA).
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  • This work was supported by the National Science Foundation (NSF-STC program under DMR-0120967) and the University of Washington through the Technology Gap Innovation Fund.

Abstract

original image

Highly efficient white polymer light-emitting diodes (WPLEDs) are demonstrated using neutral conjugated polymer surfactant PFN-OH as the electron-injection layer through solution processing. The electroluminescence spectra and luminance efficiency are strongly dependent on the morphology of the PFN-OH films. The dramatic improvement of device performance is attributed to the efficient hole-blocking ability due to mixed solvent-induced PFN-OH chain aggregation.

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