Universal Display Corporation
ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES

Abstract:

A compound having a structure of Formula I, ##STR00001## is provided. In Formula I, two of Z.sup.1, Z.sup.2, Z.sup.3, and Z.sup.4 are C and the other two are N; each of X.sup.1 to X.sup.16 is independently C or N; each of L.sup.1 and L.sup.2 is independently a direct bond or a linker; one of L.sup.1 and L.sup.2 is present; M is Pd or Pt; each R.sup.A, R.sup.B, R.sup.C, and R.sup.D is independently hydrogen or a substitutent selected from the General Substituent; and any two of R.sup.A, R.sup.B, R.sup.C, and R.sup.D can be joined or fused together to form a ring. Formulations, OLEDs, and consumer products including the compound of Formula I are also disclosed.