Phenylcarbazole-Based Phosphine Oxide Host Materials For High Efficiency In Deep Blue Phosphorescent Organic Light-Emitting Diodes

Authors

  • Soon Ok Jeon,

    1. Department of Polymer Science and Engineering Dankook University 126, Jukjeon-dong, Suji-gu, Yongin, Gyeonggi, 448-701 (Korea)
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  • Kyoung Soo Yook,

    1. Department of Polymer Science and Engineering Dankook University 126, Jukjeon-dong, Suji-gu, Yongin, Gyeonggi, 448-701 (Korea)
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  • Chul Woong Joo,

    1. Department of Polymer Science and Engineering Dankook University 126, Jukjeon-dong, Suji-gu, Yongin, Gyeonggi, 448-701 (Korea)
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  • Jun Yeob Lee

    Corresponding author
    1. Department of Polymer Science and Engineering Dankook University 126, Jukjeon-dong, Suji-gu, Yongin, Gyeonggi, 448-701 (Korea)
    • Department of Polymer Science and Engineering Dankook University 126, Jukjeon-dong, Suji-gu, Yongin, Gyeonggi, 448-701 (Korea).
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Abstract

Highly efficient deep blue phosphorescent organic light-emitting diodes are developed using novel phenylcarbazole-based phosphine oxide host materials (PPO1 and PPO2). A deep blue phosphorescent dopant, tris((3,5-difluoro-4-cyanophenyl)pyridine) iridium, is doped into PPO1 and PPO2 at a doping concentration of 15% and a high quantum efficiency of 18.4% is obtained with color coordinates of (0.14, 0.15).

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