Phosphorescent Organic Light Emitting Diode Using Vinyl Derivatives of Hole Transport and Dopant Materials

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概要

• 論文の詳細を見る

• Organic light-emitting diodes (OLEDs) were prepared by a deposition polymerization method, in which vinyl monomers were evaporated and then annealed after deposition. N,N$'$-diphenyl-N,N$'$-bis(4-vinylphenyl)benzidine (DvTPD) was used both for a hole transport layer (HTL) and for the host material of an emissive layer (EML). bis(1-phenylisoquinoline)acetylacetonate iridium(III) [Ir(piq)2acac] and its styryl derivative bis(1-phenylisoquinolinate)-6-(4-vinylphenyl)acetylacetonate iridium(III) [Ir(piq)2acac-vb] were used as dopants. Ir(piq)2acac and Ir(piq)2acac-vb showed comparable emission characteristics. The device lifetime was improved by the thermal polymerization of DvTPD, and it was further improved by polymerizing both the host and dopant molecules to form a copolymer instead of a molecularly dispersed EML. In addition, the device with a codeposition-polymerized EML showed a small tendency of luminescence efficiency to decrease with increasing luminance. Deposition polymerization, achieved by evaporating vinyl monomers followed by thermal annealing, can be a promising method for constructing OLED structures.

• 2008-02-25

著者

• Usui Hiroaki

  Tokyo Institute Of Technology Department Of Textile And Polymeric Materials

• KAWAKAMI Akira

  Tokyo University of Agriculture and Technology, Department of Organic and Polymer Materials Chemistr

• Taka Hideo

  Konica Minolta Technology Center, Inc., Hino, Tokyo 191-8511, Japan

• Otsuki Eiji

  Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan

• Fujieda Masashi

  Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan

• Kita Hiroshi

  Konica Minolta Technology Center, Inc., Hino, Tokyo 191-8511, Japan

• Sato Hisaya

  Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan

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• Vapor Deposition Polymerization of Polyimide Having Perylene Unit and its Characterization by Displacement Current Measurement
• Electrospray Deposition of PEDOT-PSS and Electrochemical Characterization
• Current-Induced Spectrum Change of Phosphorescent Organic Light-Emitting Diode Constructed with Vinyl Compounds
• Phosphorescent Organic Light Emitting Diode Using Vinyl Derivatives of Hole Transport and Dopant Materials
• Interface Control by Surface-Initiated Deposition Polymerization and Its Application to Organic Light-Emitting Devices

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