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Advanced Materials

Molecularly Controlled Interfacial Layer Strategy Toward Highly Efficient Simple-Structured Organic Light-Emitting Diodes

Authors

  • Tae-Hee Han,

    1. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong, Nam-gu, Pohang, Gyungbuk 790-784, Korea
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  • Mi-Ri Choi,

    1. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong, Nam-gu, Pohang, Gyungbuk 790-784, Korea
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  • Seong-Hoon Woo,

    1. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong, Nam-gu, Pohang, Gyungbuk 790-784, Korea
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  • Sung-Yong Min,

    1. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong, Nam-gu, Pohang, Gyungbuk 790-784, Korea
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  • Chang-Lyoul Lee,

    1. Advanced Photonics Research Institute (APRI), Gwangju Institute of Science & Technology (GIST), 1 Oryong-dong, Buk-gu, Gwangju, 500-712, Korea
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  • Tae-Woo Lee

    Corresponding author
    1. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong, Nam-gu, Pohang, Gyungbuk 790-784, Korea
    • Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong, Nam-gu, Pohang, Gyungbuk 790-784, Korea.
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Abstract

A highly efficient simplified organic light-emitting diode (OLED) with a molecularly controlled strategy to form near-perfect interfacial layer on top of the anode is demonstrated. A self-organized polymeric hole injection layer (HIL) is exploited increasing hole injection, electron blocking, and reducing exciton quenching near the electrode or conducting polymers; this HIL allows simplified OLED comprised a single small-molecule fluorescent layer to exhibits a high current efficiency (∼20 cd/A).

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