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A highly efficient tris-cyclometalated iridium complex based on phenylphthalazine derivative for organic light-emitting diodes

Authors
Journal
Organic Electronics
1566-1199
Publisher
Elsevier
Publication Date
Volume
10
Issue
4
Identifiers
DOI: 10.1016/j.orgel.2009.02.013
Keywords
  • Tris-Cyclometalated Iridium(Iii) Complex
  • Organic Light-Emitting Diodes
  • Phosphorescence
  • Carbazole
  • Phenylphthalazine Derivative
Disciplines
  • Design
  • Physics

Abstract

Abstract A novel ligand 9-(4-(4-chlorophenyl)phthalazin-1-yl)-9 H-carbazole (HCPC) was designed and prepared, and the corresponding tris-cyclometalated iridium(III) complex Ir(CPC) 3 was readily synthesized by the reaction of the ligand with IrCl 3 · 3H 2O at 80 °C for 20 h. A highly efficient organic light-emitting device using this complex as a dopant was obtained. The device fabricated by solution process showed a maximum luminance of 2948 cd/m 2 at a current density of 115.6 mA/cm 2 and a maximum external quantum efficiency of 20.2% at 0.18 mA/cm 2.

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