Macromolecular Research

, Volume 14, Issue 3, pp 343–347 | Cite as

Synthesis and effect ont-butyl pbd of the blue light emitting poly(phenyl-9,9-dioctyl-9′,9′-dihexanenitrile)fluorene

  • Byong-Su Kim
  • Chung-Gi Kim
  • Jea-Jin Oh
  • Min-Sook Kim
  • Gi-Won Kim
  • Dong-Kyu Park
  • Hyung-Suk Woo


A novel, blue light-emitting polymer, poly(phenyl-9,9-dioctyl-9′,9′dihexanenitrile)fluorene (PPFC6N), containing an alkyl and cyano group in the side chain, was synthesized by Suzuki polymerization and characterized. The polymer structure was confirmed by1H-NMR. The number average molecular weight and the weight average molecular weight of the obtained polymer were 9,725 and 9,943 respectively. The resulting polymer was thermally stable with a glass transition temperature (T g ) of 93 °C, and was easily soluble in common organic solvents such as THF, toluene, chlorobenzene and chloroform. The HOMO and LUMO energy levels of the polymer were revealed as 5.8 and 2.88 eV by cyclic voltammetry study, respectively. The ITO/PEDOT:PSS (40 nm)/PPFC6N (80 nm)/LiF (1 nm)/Al (150 nm) device fabricated from the polymer emitted a PL spectrum at 450 nm and showed a real blue emission for pure PPFC6N in the EL spectrum. Whent-butyl PBD was introduced as a hole blocking layer, the device performance was largely improved and the EL spectrum was slightly shifted toward deep blue. The device with PPFC6N containingt-butyl PBD layer showed the maximum luminance of 3,200 cd/m2 at 9.5 V with a turnon voltage of 7 V.


PLED hole blocking layer polyfluorene derivative t-butyl PBD 


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Copyright information

© The Polymer Society of Korea and Springer 2006

Authors and Affiliations

  • Byong-Su Kim
    • 1
  • Chung-Gi Kim
    • 1
  • Jea-Jin Oh
    • 1
  • Min-Sook Kim
    • 1
  • Gi-Won Kim
    • 1
  • Dong-Kyu Park
    • 1
  • Hyung-Suk Woo
    • 2
  1. 1.Center for Organic Devices and Advanced Materials, Department of ChemistryKyungsung UniversityBusanKorea
  2. 2.Department of Opto-electronic Devices EngineeringKyungsung UniversityBusanKorea

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