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Organic light-emitting diodes from homoleptic square planar complexes

United States Patent

November 12, 2013
View the Complete Patent at the US Patent & Trademark Office
Homoleptic square planar complexes [M(N.LAMBDA.N).sub.2], wherein two identical N.LAMBDA.N bidentate anionic ligands are coordinated to the M(II) metal center, including bidentate square planar complexes of triazolates, possess optical and electrical properties that make them useful for a wide variety of optical and electrical devices and applications. In particular, the complexes are useful for obtaining white or monochromatic organic light-emitting diodes ("OLEDs"). Improved white organic light emitting diode ("WOLED") designs have improved efficacy and/or color stability at high brightness in single- or two-emitter white or monochrome OLEDs that utilize homoleptic square planar complexes, including bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]platinum(II) ("Pt(ptp).sub.2").
Omary; Mohammad A. (Denton, TX)
University of North Texas (Denton, TX)
13/ 055,974
July 8, 2009
The present invention used in part funds from the Department of Energy, DOE, Cooperative Agreement No. DE-FC26-06NT42859. The United States Government may have certain rights in the invention.