US Patent Issued to Universal Display on May 12 for "Organic electroluminescent materials and devices" (Pennsylvania, New Jersey Inventors)

ALEXANDRIA, Va., May 12 -- United States Patent no. 12,628,547, issued on May 12, was assigned to Universal Display Corp. (Ewing, N.J.).

"Organic electroluminescent materials and devices" was invented by Jui-Yi Tsai (Newtown, Pa.), Alexey Borisovich Dyatkin (Ambler, Pa.), Walter Yeager (Yardley, Pa.) and Pierre-Luc T. Boudreault (Pennington, N.J.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A compound including a first ligand LA of Formula I,is described. In Formula I, each of X1 to X9 is independently C or N; one of Z1 and Z2 is C and the other is N; each of K1 and K2 is independently a direct bond, O, or S; at least one of K1 and K2 is a direct bond; at least one RB is not hydrogen; R3 is selected from a...