Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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Characterization of Blue Organic Light Emitting Diodes using TPM-BiP

TPM-BiP 청색 형광 재료의 전계발광특성

  • Chang, Ji-Geun (Department of Electronics and Computer Engineering, Dankook University) ;
  • Shin, Sang-Baie (Department of Electronics and Computer Engineering, Dankook University) ;
  • Ahn, Jong-Myoung (Department of Electronics and Computer Engineering, Dankook University) ;
  • Chang, Ho-Jung (Department of Electronics and Computer Engineering, Dankook University) ;
  • Lee, Hak-Min (Department of Electronics and Computer Engineering, Dankook University) ;
  • Gong, Myoung-Sun (Department Chemistry, Dankook University) ;
  • Kim, Min-Young (Division of Computer Information, Baekseok College) ;
  • Kim, Jun-Woo (Display Material Div., DaeJoo Electronic Materials Co., Ltd.)
  • Published : 2007.06.30
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Abstract

For the fabrication of blue color organic light emitting diodes(OLED) with a high performance, 2-TNATA [4,4',4"-tris (2-naphthylphenyl-phenylamino)-triphenylamine] as hole injection material and NPB [N,N'-bis (1-naphthyl) -N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine] as hole transport material were deposited on the ITO (indium tin oxide)/glass substrate by the vacuum thermal evaporation. After then, blue color emission layer was deposited using TPM-BiP[(4'-Benzoylferphenyl-4-yl)phenyl-methanone-Diethyl(biphenyl-4-ymethyl)phosphonate] and GDI602 as a light emitting organic material. Finally, the two kinds of OLEDs with the structure of $ITO/2-TNATA/NPB/TPM-BiP/Alq_3/LiF/Al and ITO/2-TNATA/NPB/GDI602/Alq_3/LiF/Al$ were prepared by in-situ deposition. The maximum current density and luminance were found to be about $588\;mA/cm^2\;and\;5239\;cd/m^2$ at 12V for the OLED sample with the structure of $ITO/2-TNATA/NPB/TPM-BiP/Alq_3/LiF/Al$. Color coordinate of blue OLED was x=0.18, y=0.18 (at llV) and the maximum current efficiency was 2.82 cd/A (at 6V) with the peak emission wavelength of 440 nm.

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