US Patent Issued to Universal Display on Dec. 30 for "Organic electroluminescent materials and devices" (New Jersey, Pennsylvania Inventors)

ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,514,109, issued on Dec. 30, was assigned to Universal Display Corp. (Ewing, N.J.).

"Organic electroluminescent materials and devices" was invented by Hsiao-Fan Chen (Ewing, N.J.) and Jason Brooks (Philadelphia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A compound having a structure of Formula I,useful as a phosphorescent emitter in organic light emitting devices is disclosed. In Formula I, Ar1 and Ar2 are independently 5- or 6-membered aromatic rings; X1 to X11 are independently C or N; at least one of X1 to X11 is N; one of Z1 and Z2 is C, and the other one is N; when Z1 is N, X4 is C; L1, L2, and L3 are each linkers; at least one of L2 and L3 is p...