Efficient green electroluminescence of pure chromaticity from a polycyclic aromatic hydrocarbon

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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  • B. X. Mi
  • Z. Q. Gao
  • N. B. Wang
  • S. T. Lee


Original languageEnglish
Pages (from-to)2244-2247
Journal / PublicationJournal of Materials Chemistry
Issue number9
Online published30 Jul 2001
Publication statusPublished - 2001


A new highly fluorescent material with a condensed aromatic ring, 7-naphthylbenzo[a]perylene (pNNA), was synthesized for application in organic electroluminescent devices (OELDs). The fluorescent quantum yield of this material in a 1 × 10-5 M solution of dichloromethane approached unity. OELDs have been fabricated with a configuration of ITO/NPB/AIQ-pNNA/Mg-Ag (ITO: indium tin oxide, NPB: N,N′-bis(1-naphthyl)-N,N′diphenyl-1,1′-biphenyl-4, 4′-diamine and AIQ is tris(8-hydroxyquinolinato)aluminium(111)). The device showed strong green emission with a narrow peak at 542 nm. When a mixture of pNNA and A1Q (1:400) was deposited from a single source, the electroluminescent efficiency of the devices reached 6.5 cd A-1 at 20 mA cm-2 and 7.8 V. A brightness of 15000 cd m-2 was achieved at a driving voltage of 11 V.

Research Area(s)

  • Electroluminescence, Photoluminescence, Polycyclic aromatic hydrocarbon