lr(III)-Based Phosphors with Bipyrazolate Ancillaries; Rational Design, Photophysics, and Applications in Organic Light-Emitting Diodes
A series of three charge-neutral Ir(III) complexes bearing both neutral chelating ligands 4, 4'di-t-butyl-2, 2'bipyridine (dtbbpy) and mono-anionic cyclometalated ligands derived from 2-phenylpyridine (ppyH), together with either two mono-anionic ligands or a single dianionic chelate deriv...
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Published in | Inorganic chemistry Vol. 54; no. 22; pp. 10811 - 10821 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
16.11.2015
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Subjects | |
Online Access | Get full text |
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Summary: | A series of three charge-neutral Ir(III) complexes bearing both neutral chelating ligands 4, 4'di-t-butyl-2, 2'bipyridine (dtbbpy) and mono-anionic cyclometalated ligands derived from 2-phenylpyridine (ppyH), together with either two mono-anionic ligands or a single dianionic chelate derived from 5, 5'di(trifluoromethyl)3, 3'bipyrazole (bipzH[sub 2]) or 5,5'(1-methylethylidene)-bis-(-3-trifluoromethyl-1H-pyrazole ) (mepzH[sub 2]), was successfully synthesized. Organic light emitting diodes were successfully fabricated. A double emitting layer design was adopted in the device architecture using Ir(III) metal complexes 3 and 4, attaining peak external quantum efficiencies, luminance efficiencies, and power efficiencies of 18.1% and 16.6%, respectively. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 content type line 23 ObjectType-Feature-2 |
ISSN: | 0020-1669 |
DOI: | 10.1021/acs.inorgchem.5b01835 |