ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,550,604, issued on Feb. 10, was assigned to Universal Display Corp. (Ewing, N.J.).
"Organic electroluminescent materials and devices" was invented by Chuanjun Xia (Lawrenceville, N.J.), Raymond C. Kwong (Plainsboro, N.J.) and Suman Layek (Lawrenceville, N.J.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Novel compounds comprising heteroleptic iridium complexes are provided. The compounds have a particular combination of ligands which includes a single pyridyl dibenzo-substituted ligand. The compounds may be used in organic light emitting devices, particularly as emitting dopants, to provide devices having improved efficiency, lifetime, and manufacturin...