Organic Light-Emitting Devices Patterned by Screen-Printing

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  • Mori Kentaro
    Department of Functional Polymer Science, Shinshu University, 3-15-1 Tokita, Ueda, Nagano 386-8567, Japan
  • Ning TaiLu
    Fuji Name Plate Co., Ltd., 3884-1 Kanazawa-yanokuchi, Chino, Nagano 391-0012, Japan
  • Ichikawa Musubu
    Department of Functional Polymer Science, Shinshu University, 3-15-1 Tokita, Ueda, Nagano 386-8567, Japan
  • Koyama Toshiki
    Department of Functional Polymer Science, Shinshu University, 3-15-1 Tokita, Ueda, Nagano 386-8567, Japan
  • Taniguchi Yoshio
    Department of Functional Polymer Science, Shinshu University, 3-15-1 Tokita, Ueda, Nagano 386-8567, Japan

書誌事項

公開日
2000
DOI
  • 10.1143/jjap.39.l942
公開者
The Japan Society of Applied Physics

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説明

We have demonstrated a patterned organic light-emitting device fabricated by screen-printing on the basis of the doped hole-transport layer (DHTL) which is our novel concept. The DHTL, which consisted of a polymeric compound of N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1′-biphenyl-4,4′-diamine (P-TPD) as a hole-transport material and tris (4-bromophenyl) aminium hexachloroantimonate (TBAHA) as an electron-accepting dopant, was patterned by screen-printing. The luminous area of the device was restricted to the DHTL-printed area. The device was operated at approximately 5 V, and a luminance of 4800 cd/m2 was obtained at a current density of 150 mA/cm2. The appropriate concentration of P-TPD was 80 g/l in dichlorobenzene, at which a smooth and pinhole-less layer was obtained with a thickness of 0.5 μm. The suitable concentration of TBAHA in P-TPD was approximately 8 wt%.

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