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Electrophosphorescent Light Emitting Devices Using Mixed Ligand Ir(III) Complexes

Published online by Cambridge University Press:  15 March 2011

Hae Won Lee ,
R. R. Das ,
Chang-Lyoul Lee ,
Yong-Young Noh  and
Jang-Joo Kim
Hae Won Lee
Affiliation:
Department of Materials Science and Engineering, Kwangju Institute of Science and Technology (K-JIST), 1 Oryong-dong, Buk-gu, Kwangju 500-712, Korea
R. R. Das
Affiliation:
Department of Materials Science and Engineering, Kwangju Institute of Science and Technology (K-JIST), 1 Oryong-dong, Buk-gu, Kwangju 500-712, Korea
Chang-Lyoul Lee
Affiliation:
Department of Materials Science and Engineering, Kwangju Institute of Science and Technology (K-JIST), 1 Oryong-dong, Buk-gu, Kwangju 500-712, Korea
Yong-Young Noh
Affiliation:
Department of Materials Science and Engineering, Kwangju Institute of Science and Technology (K-JIST), 1 Oryong-dong, Buk-gu, Kwangju 500-712, Korea
Jang-Joo Kim
Affiliation:
Department of Materials Science and Engineering, Kwangju Institute of Science and Technology (K-JIST), 1 Oryong-dong, Buk-gu, Kwangju 500-712, Korea
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Abstract

We have fabricated phosphorescent light emitting devices using mixed ligand bisorthometalated Ir(III) complexes, chlorobis-(2-phenylpyridinato-N,C 2 ')pyridineiridium(III) [Ir(Cl)(ppy)2(py)] and chlorobis-(2-phenylpyridinato-N,C 2')triphenylphosphine iridium(III) [Ir(Cl)(ppy)2P(Ph)3] chlorobis-(2-phenylpyridinato-N,C 2')tri-n-butylphosphine iridium(III) [Ir(Cl)(ppy)2P(n-Bu)3], where ppy is the orthometalating ligand. These complexes vary in their HOMO (highest occupied molecular orbital), LUMO (lowest unoccupied molecular orbital) and emissive states in accordance with the φ-accepting abilities of the non-orthometalating ligands. The lifetimes and EL spectrum of the devices were studied and compared.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 708: Symposium BB – Organic Optoelectronic Materials, Processing and Devices , 2001 , BB3.38
Copyright
Copyright © Materials Research Society 2002

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References

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