Chem. J. Chinese Universities ›› 2005, Vol. 26 ›› Issue (10): 1900.

• Articles • Previous Articles     Next Articles

Synthesis and Unitization of Novel Electroluminescent Material Monodisperse Oligofluorenes

HU Xiao-Dan, SU Li, LIAO Qi, ZHEN Chang-Gua, CHUAI Yu-Tao, ZOU De-Chun   

  1. Department of Polymer Science and Engineering,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China
  • Received:2004-09-20 Online:2005-10-10 Published:2005-10-10

Abstract: A series of novel electroluminescen material monodisperse oligofluorenes,were synthesized by modified Sonogashira reaction.The resulting oligomers were characterized by NMR,elemental analysis,DSC and MS.The products showed a strong PL emission and good solubility in common organic solvents.Light(emitting) diodes(LED) with the configuration ITO/NPB/OF/BCP/Alq/Mg∶Ag were fabricated.The LED based on OF4R4 exhibited highly efficient and stable electroluminescence and reached its maximum of 5 795 cd/m2 at 20 V,on the other hand,the LED based on OF4R6 reached its external quantum efficiency of 1.0% at 11 V whereas the luminance was 511 cd/m2 and the maximum was 2 690 cd/m2.

Key words: Oligofluorene, Organiclight emitting diode(OLED), Electroluminescent materials

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