Efficient Single Active Layer Electrophosphorescent White Polymer Light-Emitting Diodes

Authors

  • H. B. Wu,

    1. Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory of Specially Functional Materials, South China University of Technology, Guangzhou 510640 (P.R. China)
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  • J. H. Zou,

    1. Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory of Specially Functional Materials, South China University of Technology, Guangzhou 510640 (P.R. China)
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  • F. Liu,

    1. Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory of Specially Functional Materials, South China University of Technology, Guangzhou 510640 (P.R. China)
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  • L. Wang,

    1. Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory of Specially Functional Materials, South China University of Technology, Guangzhou 510640 (P.R. China)
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  • A. Mikhailovsky,

    1. Institute for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106-9510 (USA)
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  • G. C. Bazan,

    1. Institute for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106-9510 (USA)
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  • W. Yang,

    1. Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory of Specially Functional Materials, South China University of Technology, Guangzhou 510640 (P.R. China)
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  • Y. Cao

    1. Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory of Specially Functional Materials, South China University of Technology, Guangzhou 510640 (P.R. China)
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  • H. B. W., W. Y., and Y. C. are grateful to the Ministry of Science and Technology Project (No. 2002CB613400) and the Natural Science Foundation of China (Project No. 50433030 and U0634003) for the financial support. H. W. also acknowledges the Doctorate Foundation of South China University of Technology for the financial support. This work was supported by US Department of Energy solid state lighting program (Contract DE-FC26-04NT42277).

Abstract

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Efficient electrophosphorescent white emission polymer light-emitting diodes (PLEDs) with single active layer is reported. Despite their simple architectures and straightforward fabrication procedures, double-doped devices with CIE coordinate of (0.33, 0.36) at 12 mA cm–2 can show peak PE of 6.4 lm W–1 and a peak LE of 16.1 cd A–1 for forward viewing, while triple-doped device (0.34, 0.47) can show a peak PE of 10.0 lm W–1 and a peak LE of 24.3 cd A–1. The demonstrated efficient white PLEDs hold great promise for solid state lighting application.

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