Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

tris-Heteroleptic cyclometalated iridium(III) complexes with ambipolar or electron injection/transport features for highly efficient electrophosphorescent devices

Language

English

Abstract

© 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. A series of tris-heteroleptic phosphorescent cyclometalated IrIII complexes with two different cyclometalating ligands and one ancillary ligand was synthesized. Through manipulation of the electronic features of individual cyclometalating ligands, not only the emission color and electrochemical properties of these IrIII complexes can be tuned, but also unique charge carrier injection and transport traits can be conferred to them. Owing to the enhanced electron injection/transport and ambipolar characters associated with these tris-heteroleptic structures, these IrIII emitters showed very impressive electroluminescent performance with a maximum external quantum efficiency of 20.20 %, luminance efficiency of 69.41 cdA-1 and power efficiency of 35.15 Lm W-1. These results provide a new outlet to design and synthesize highly efficient electrophosphors for phosphorescent organic light-emitting diodes.

Keywords

Ambipolar, Heteroleptic, Iridium(III) complexes, Organic light-emitting diodes, Phosphorescence

Publication Date

2015

Source Publication Title

Chemistry - An Asian Journal

Volume

10

Issue

1

Start Page

252

End Page

262

Publisher

Wiley-VCH Verlag

DOI

10.1002/asia.201403057

Link to Publisher's Edition

http://dx.doi.org/10.1002/asia.201403057

ISSN (print)

18614728

ISSN (electronic)

1861471X

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