US Patent Issued to Universal Display on June 10 for "Organic electroluminescent materials and devices" (Pennsylvania Inventors)

ALEXANDRIA, Va., June 18 -- United States Patent no. 12,325,719, issued on June 10, was assigned to Universal Display Corp. (Ewing, N.J.).

"Organic electroluminescent materials and devices" was invented by Zhiqiang Ji (Chalfont, Pa.), Jui-Yi Tsai (Newtown, Pa.), Alexey Borisovich Dyatkin (Ambler, Pa.) and Chun Lin (Yardley, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A compound including a first ligand LA ofis disclosed. In the structure of Formula I, one of L1 and L2 is C, and the other is N; Y1 to Y14 are each C or N; at least two adjacent Y7, Y8, Y9, and Y10 are carbon atoms that are fused to a structure ofZ1 and Z2 are each O, S, Se, NR, CRR', or SiRR'; and each R, R', RA, RB, RC, and RD is hydrog...