Universal Display Corporation
Organic electroluminescent materials and devices

Last updated:

Abstract:

A compound having a first ligand L.sub.A of Formula I ##STR00001## is disclosed, where Z.sup.1 to Z.sup.4 are each independently C or N; at least one of Z.sup.1 to Z.sup.4 is N; and ring A is a structure of Formula II ##STR00002##

Status:
Grant
Type:

Utility

Filling date:

26 Mar 2019

Issue date:

19 Jul 2022