The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2020
Filed:
Aug. 29, 2013
The Trustees of Princeton University, Princeton, NJ (US);
The University of Southern California, Los Angeles, CA (US);
Mark E. Thompson, Anaheim, CA (US);
Peter Djurovich, Long Beach, CA (US);
Sergey Lamansky, Camarillo, CA (US);
Drew Murphy, Lakewood, CA (US);
Raymond Kwong, Plainsboro, NJ (US);
Feras Abdel-Razzaq, Los Angeles, CA (US);
Stephen R. Forrest, Ann Arbor, MI (US);
Marc A. Baldo, Princeton, NJ (US);
Paul A. Burrows, Kennewick, WA (US);
The Trustees of Princeton University, Princeton, NJ (US);
The University of Southern California, Los Angeles, CA (US);
Abstract
Organic light emitting devices are described wherein the emissive layer comprises a host material containing an emissive molecule, which molecule is adapted to luminesce when a voltage is applied across the heterostructure, and the emissive molecule is selected from the group of phosphorescent organometallic complexes, including cyclometallated platinum, iridium and osmium complexes. The organic light emitting devices optionally contain an exciton blocking layer. Furthermore, improved electroluminescent efficiency in organic light emitting devices is obtained with an emitter layer comprising organometallic complexes of transition metals of formula LMX, wherein L and X are distinct bidentate ligands. Compounds of this formula can be synthesized more facilely than in previous approaches and synthetic options allow insertion of fluorescent molecules into a phosphorescent complex, ligands to fine tune the color of emission, and ligands to trap carriers.