Molecular Engineering of Blue Fluorescent Molecules Based on Silicon End-Capped Diphenylaminofluorene Derivatives for Efficient Organic Light-Emitting Materials

Authors

  • Kum Hee Lee,

    1. Department of Chemistry Sungkyunkwan University 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi, 440-746 (Korea)
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  • Lee Kyung Kang,

    1. Department of Chemistry Sungkyunkwan University 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi, 440-746 (Korea)
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  • Jin Yong Lee,

    1. Department of Chemistry Sungkyunkwan University 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi, 440-746 (Korea)
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  • Sunwoo Kang,

    1. Department of Chemistry Sungkyunkwan University 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi, 440-746 (Korea)
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  • 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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  • 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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  • Seung Soo Yoon

    Corresponding author
    1. Department of Chemistry Sungkyunkwan University 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi, 440-746 (Korea)
    • Department of Chemistry Sungkyunkwan University 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi, 440-746 (Korea).
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Abstract

Blue fluorescent materials based on silicone end-capped 2-diphenylaminofluorene derivatives are synthesized and characterized. These materials are doped into a 2-methyl-9,10-di-[2-naphthyl]anthracene host as blue dopant materials in the emitting layer of organic light-emitting diode devices bearing a structure of ITO/DNTPD (60 nm)/NPB (30 nm)/emitting layer (30 nm)/Alq3 (20 nm)/LiF (1.0 nm)/Al (200 nm). All devices exhibit highly efficient blue electroluminescence with high external quantum efficiencies (3.47%–7.34% at 20 mA cm−2). The best luminous efficiency of 11.2 cd A−1 and highest quantum efficiency of 7.34% at 20 mA cm−2 are obtained in a device with CIE coordinates (0.15, 0.25). A deep-blue OLED with CIE coordinates (0.15, 0.14) exhibits a luminous efficiency of 3.70 cd A−1 and quantum efficiency of 3.47% at 20 mA cm−2.

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