Highly Efficient Polymer White-Light-Emitting Diodes Based on Lithium Salts Doped Electron Transporting Layer

Authors

  • Fei Huang,

    1. Department of Materials Science and Engineering Institute of Advanced Materials and Technology University of Washington Box 352120, Seattle, WA 98195-2120 (USA)
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  • Ping-I. Shih,

    1. Department of Applied Chemistry National Chiao Tung University Hsinchu, 300 (Taiwan ROC)
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  • Ching-Fong Shu,

    1. Department of Applied Chemistry National Chiao Tung University Hsinchu, 300 (Taiwan ROC)
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  • Yun Chi,

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

    Corresponding author
    1. Department of Materials Science and Engineering Institute of Advanced Materials and Technology University of Washington Box 352120, Seattle, WA 98195-2120 (USA)
    • Department of Materials Science and Engineering Institute of Advanced Materials and Technology University of Washington Box 352120, Seattle, WA 98195-2120 (USA).
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  • F. Huang and P.-I. Shih contributed equally to this work. Financial supports from the National Science Foundation (NSF-STC Program under Agreement Number DMR-0120967) and the Boeing-Johnson Foundation are acknowledged.

Abstract

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A Li2CO3-doped water/alcohol-soluble neutral conjugated polymer is used as the electron-injection layer in a solution-processed polymer OWLED with very high efficiency. A maximum forward viewing luminous efficiency of 36.1 cd A−1 and a power efficiency of 23.4 lm W−1 were achieved, values comparable to those reported for the state-of-the-art vacuum deposited small -molecule OWLEDs.

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