High Efficiency and Small Roll-Off Electrophosphorescence from a New Iridium Complex with Well-Matched Energy Levels

High Efficiency and Small Roll-Off Electrophosphorescence from a New Iridium Complex with Well-Matched Energy Levels

Phenylpyridazine ligands coordinating to the iridium(III) atom yield a thermally stable (5 % weight loss at 439 °C) homoleptic iridium complex with a high phosphorescent quantum yield (0.32 at room temperature). This material has well‐matched energy levels with the host, and highly efficient electro...

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Bibliographic Details
Published in:Advanced materials (Weinheim) Vol. 20; no. 4; pp. 774 - 778
Main Authors: Gao, Z. Q., Mi, B. X., Tam, H. L., Cheah, K. W., Chen, C. H., Wong, M. S., Lee, S. T., Lee, C. S.
Format: Journal Article
Language:English
Published: Weinheim WILEY-VCH Verlag 18-02-2008
WILEY‐VCH Verlag
Subjects:
Electrophosphorescence
Green-light emitters
Iridium complexes
Light-emitting diodes
Light‐emitting diodes, organic
organic
Phenylpyridazines
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Summary:Phenylpyridazine ligands coordinating to the iridium(III) atom yield a thermally stable (5 % weight loss at 439 °C) homoleptic iridium complex with a high phosphorescent quantum yield (0.32 at room temperature). This material has well‐matched energy levels with the host, and highly efficient electrophosphorescence (52 cd A–1; see figure) with a small roll‐off (23 % at 70 mA cm–2) in device efficiency is achieved.
Bibliography:Technology Commission Guangzhou-Hong Kong Industrial Support - No. ITC/05-06/02
ark:/67375/WNG-42MJ52HP-K
Hong Kong Baptist University Faculty research - No. FRG/05-06/I-48
Hong Kong Innovation
istex:951639F4C4AD8BBDFC74F00F64CDFAFFD3F062F7
This work was supported by a Hong Kong Baptist University Faculty research grant (FRG/05-06/I-48), a Hong Kong Innovation and Technology Commission Guangzhou-Hong Kong Industrial Support Grant (ITC/05-06/02), and financial support from Nanjing University of Posts and Telecommunications (NY207013).
Nanjing University of Posts and Telecommunications - No. NY207013
ArticleID:ADMA200702343
This work was supported by a Hong Kong Baptist University Faculty research grant (FRG/05‐06/I‐48), a Hong Kong Innovation and Technology Commission Guangzhou‐Hong Kong Industrial Support Grant (ITC/05‐06/02), and financial support from Nanjing University of Posts and Telecommunications (NY207013).
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ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200702343