Electroluminescence property of highly soluble Ir(III) complex utilized by various hole blocking layers in polymer light emitting diodes

Young Wook Park, Young Min Kim, Jin Hwan Choi, Tae Hyun Park, Jin Wook Jeong, Min Ju Cho, Dong Hoon Choi, Byeong Kwon Ju

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The tris(2-phenylpyridine)iridium(III) [Ir(ppy) 3] is a well known highly efficient green light-emitting phosphorescent guest dye dopant, but its relatively low solubility has been obstructing it to be used in polymer light-emitting diodes (PLEDs). According to our latest reports the solubility of Ir(ppy) 3 complexes with the carbazole ligands, i.e., Ir(Czppy) 3, was improved significantly in organic solvents, and was sufficient to be used in soluble process. This highly soluble Ir(Czppy) 3 complex showed remarkably higher photoluminescence characteristics than conventional Ir(ppy) 3, but it showed similar or comparably better electroluminescence (EL) characteristics, when the PLED was composed by widely used conventional hole blocking layer (HBL) and electron transport layer; 2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline and tris(8-hydroxyquinoline) aluminum, respectively. In this report, we applied various HBLs to improve the EL characteristics of soluble Ir(III) complex based phosphorescent PLEDs. The PLEDs utilized by the wide band-gap 3-(4-biphenylyl)-4-phenyl5-tert-butylphenyl- 1,2,4-triazole demonstrated highly improved the current and the external quantum efficiency of 17.61 cd/A and 6.42%, respectively.

Original languageEnglish
Pages (from-to)3250-3253
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume10
Issue number5
DOIs
Publication statusPublished - 2010 May 1

Fingerprint

Iridium
Electroluminescence
iridium
electroluminescence
Light emitting diodes
Polymers
light emitting diodes
Light
polymers
Solubility
solubility
Methyl Green
carbazoles
Electron Transport
Quantum efficiency
Organic solvents
quantum efficiency
Photoluminescence
Energy gap
Coloring Agents

Keywords

  • Highly soluble ir(III) complex
  • Hole blocking layer
  • Ir(Czppy)
  • Ir(ppy)
  • Phosphorescent

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

Cite this

Electroluminescence property of highly soluble Ir(III) complex utilized by various hole blocking layers in polymer light emitting diodes. / Park, Young Wook; Kim, Young Min; Choi, Jin Hwan; Park, Tae Hyun; Jeong, Jin Wook; Cho, Min Ju; Choi, Dong Hoon; Ju, Byeong Kwon.

In: Journal of Nanoscience and Nanotechnology, Vol. 10, No. 5, 01.05.2010, p. 3250-3253.

Research output: Contribution to journalArticle

Park, Young Wook ; Kim, Young Min ; Choi, Jin Hwan ; Park, Tae Hyun ; Jeong, Jin Wook ; Cho, Min Ju ; Choi, Dong Hoon ; Ju, Byeong Kwon. / Electroluminescence property of highly soluble Ir(III) complex utilized by various hole blocking layers in polymer light emitting diodes. In: Journal of Nanoscience and Nanotechnology. 2010 ; Vol. 10, No. 5. pp. 3250-3253.
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