Organic Blue Electrophorescence Using a Cyclic Siloxane Compound as a Host Material

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  • ENDO Ayataka
    Department of Photonics Materials Science, Chitose Institute of Science and Technology (CIST) Crest Program, Japan Science and Technology Agency (JST) Center for Future Chemistry, Kyushu University
  • BROOKS Jason
    Universal Display Co.
  • BROWN Julie J.
    Universal Display Co.
  • SASABE Hiroyuki
    Department of Photonics Materials Science, Chitose Institute of Science and Technology (CIST)
  • ADACHI Chihaya
    Department of Photonics Materials Science, Chitose Institute of Science and Technology (CIST) Crest Program, Japan Science and Technology Agency (JST) Center for Future Chemistry, Kyushu University

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Other Title
  • シロキサン化合物をホスト材料として用いた青色有機ＥＬデバイスの素子特性
  • シロキサン カゴウブツ オ ホスト ザイリョウ ト シテ モチイタ アオイロ ユウキ EL デバイス ノ ソシ トクセイ

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Abstract

In organic blue electrophosphorescence diodes, we used hexaphenylcyclotrisiloxane (DPSiO3) as a host material aiming for high efficiency blue electroluminescence (EL). The phosphorescence spectrum of the siloxane compound was measured at T=77K in an EPA solution and the results well coincided with those of a benzene solution, indicating that the π-conjugation of DPSiO3 is basically localized in a benzene ring. In the OLED devices with DPSiO3 as a host, the maximum external EL efficiency of ηext=11.1% was obtained with iridium (III) bis (4,6-di-fluorophenyl) -pyridinato-N, C2) picolinate (FIrpic) as an emitter.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 63 (10), 686-690, 2006

    The Society of Polymer Science, Japan

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