Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Blue OLEDs Utilizing Spiro[fluorene 7,9'-benzofluorene]-type Compounds as Hosts and Dopants

  • Kim, Joo-Han (Department of Chemistry and Institute of Basic Science, Dankook University) ;
  • Jeon, Young-Min (Department of Chemistry and Institute of Basic Science, Dankook University) ;
  • Jang, Ji-Geun (Department of Electronic Engineering, Dankook University) ;
  • Ryu, Sang-Ouk (Department of Electronic Engineering, Dankook University) ;
  • Chang, Ho-Jung (OLED Team, Daejoo Electronic Materials, Siheung) ;
  • Lee, Chil-Won (OLED Team, Daejoo Electronic Materials, Siheung) ;
  • Kim, Joon-Woo (OLED Team, Daejoo Electronic Materials, Siheung) ;
  • Gong, Myoung-Seon (Department of Chemistry and Institute of Basic Science, Dankook University)
  • Published : 2009.03.20
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Abstract

A novel spiro-type host material, 5-[4-(1-naphthyl)phenyl]-spiro[fluorene-7,9'-benzofluorene] (BH-1PN) and three new dopants, namely, 5-[diphenylamino)phenyl]-spiro[fluorene-7,9'-benzofluorene] (BH-1TPA), 5-[4-(N-phenyl (m-tolyl)amino]-spiro[fluorene-7,9'-benzofluorene] (BH-1MDPA) and 5-[(N-phenyl)-2-naphthyl]amino-spiro[fluorene- 7,9'-benzofluorene] (BH-1NPA) were designed and successfully prepared using the Suzuki or amination reactions. The electroluminescence characteristics of BH-1PN as a blue host material doped with each of the blue dopants were evaluated. The structure of the device is ITO/DNTPD/NPB/BH-1PN:5% dopant/Alq3/Al-LiF. The device obtained from BH-1PN doped with diphenyl-[4-(2-[1,1;4,1]terphenyl-4-yl-vinyl)phenyl]-amine (BD-1) showed good color purity, efficiency, luminance, and current-density characteristics.

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References

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