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:
Oct. 13, 2015
Filed:
Feb. 25, 2010
Chuanjun Xia, Lawrenceville, NJ (US);
Dinesh Rayabarapu, Overland Park, KS (US);
Yonggang Wu, Hunan, CN;
Suman Layek, Lawrenceville, NJ (US);
James Fiordeliso, Yardley, PA (US);
Chuanjun Xia, Lawrenceville, NJ (US);
Dinesh Rayabarapu, Overland Park, KS (US);
Yonggang Wu, Hunan, CN;
Suman Layek, Lawrenceville, NJ (US);
James Fiordeliso, Yardley, PA (US);
UNIVERSAL DISPLAY CORPORATION, Ewing, NJ (US);
Abstract
Compounds including a ligand with a dibenzo-fused 5-membered ring substituent are provided. In particular, the compounds may be iridium complexes including imidazole coordinated to the dibenzo-substituted ligand. The dibenzo-fused 5-membered ring moiety of the ligand may be twisted or minimally twisted out of plane with respect to the rest of the ligand structure. The compound may be used in organic light emitting devices, particularly as emitting dopants in blue devices. Devices comprising the compounds may demonstrate improved stability while maintaining excellent color.