Organic light emitting diode containing a novel Ir complex as a phosphorescent emitter
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United States of America Patent
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Jan 22, 2008
Grant Date -
Oct 13, 2005
app pub date -
Apr 13, 2004
filing date -
Jul 24, 2003
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Abstract
A phosphorescent Ir complex having the following structures (I) or (II) is used as an emitter in an organic light emitting diode (OLED): ##STR00001## wherein X is an arbitrary monoanionic bidentate ligand; Z is an arbitrary moiety constituting a nitrogen-containing heterocyclic group; R.sub.1 is a substituent on the nitrogen-containing heterocyclic group; m is 0 or a positive integer; R.sub.2 and R.sub.3 independently are H, halogen, C1-C6 alkyl, a halogen-substituted C1-C6 alkyl, C1-C6 alkoxy, phenyl C1-C6 alkyl, amino, aryl, heterocyclic aryl substituent.
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