Article thumbnail

Oxadiazole-containing material with intense blue phosphorescence emission for organic light-emitting diodes

By Liang FS, Wang LX, Ma DG, Jing XB and Wang FS

Abstract

2-(2-hydroxyphenyl)-5-phenyl-1, 3, 4-oxadiazole (HOXD), characteristic of excited state intramolecular proton-transfer (ESIPT), was synthesized and found to emit strong blue phosphorescence in the solid state at room temperature and at low temperature (77 K). The photoluminescent spectrum measurement in solution showed that there are two kinds of emission: fluorescence originated from the singlet state and phosphorescence derived from the triplet state in HOXD formed by ESIPT. For the photoluminescent spectrum in the solid state, only phosphorescence emission with the lifetime of 66 mus was observed. Multiple-layer light-emitting diodes with the configuration of ITO/NPB/HOXD/BCP/Alq(3)/Mg:Ag were fabricated using HOXD as emitter and the maximum brightness of 656 cd/m(2) and the luminous efficiency of 0.14 lm/W was obtained

Topics: INTRAMOLECULAR PROTON-TRANSFER, EXCITED-STATE, ELECTROLUMINESCENT DEVICES, ORTHO-HYDROXYACETOPHENONE, 2-(2'-HYDROXYPHENYL)BENZOXAZOLE, COMPLEXES
Year: 2002
DOI identifier: 10.1063/1.1491288
OAI identifier: oai:ir.ciac.jl.cn:322003/18495
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://202.98.16.49/handle/322... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.