Synthesis and Characterization of Crosslinkable Hole Transporting Polymers.

DOI Web Site 21 References
  • NAKAO Mayumi
    Faculty of Technology, Tokyo University of Agriculture and Technology
  • 孫 準模
    東京農工大学大学院工学研究科
  • OGINO Kenji
    Faculty of Technology, Tokyo University of Agriculture and Technology
  • SATO Hisaya
    Faculty of Technology, Tokyo University of Agriculture and Technology
  • ITO Yuuichi
    Materials Research Laboratory, Toppan Printing Co., Ltd.

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Other Title
  • 架橋能を有する正孔輸送性ポリマーの合成と評価
  • カキョウノウ オ ユウスル セイコウ ユソウセイ ポリマー ノ ゴウセイ ト ヒョウカ

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Abstract

New hole-transporting polymers (TPACA and TPDCA) were prepared by condensation polymerization of triphenylamine (TPA) and tetraphenyldiaminobiphenyl (TPD) with trans-cinnamaldehyde (CA) using p-toluenesulfonic acid as a catalyst. 1H-NMR spectra revealed that these polymers contained the double bonds which are necessary for photocrosslinking. TPACA and TPDCA showed thermal decomposition onset at 400r and glass transition at 196°C and 217°C, respectively, indicating that these synthesized polymers have superb thermal stability. The polymers are transparent in the visible region and electrochemically active. The polymer films with less than 300 nm thickness became completely insoluble by the irradiation of ultraviolet light as a result of photocrosslinking of polymer chains. EL devices of a bilayer type consisting of photocrosslinked TPACA or TPDCA as a hole transporting layer and a layer of electron transporting polymer showed higher luminance than those with non-crosslinked TPACA or TPDCA due to the higher possibility of recombination of the hole and electron, indicating that well-defined bilayer structures were accomplished using photocrosslinked polymers.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 57 (1), 1-7, 2000

    The Society of Polymer Science, Japan

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