Universal Display Corporation
ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES

Abstract:

A compound having a structure of Formula I, ##STR00001## is provided. In Formula I, X.sup.1-X.sup.7, Z.sup.1 and Z.sup.2 are each independently C or N; Z.sup.3 is selected from BR', NR', PR', O, S, Se, C.dbd.O, S.dbd.O, SO.sub.2, CR'R'', SiR'R'', and GeRR''; L is selected from O, S, and NR; C.sup.1, C.sup.2, and C.sup.3 are all carbon atoms; the bonds represent single bond or double bond to fulfill the valency requirement of a neutral compound; each R.sup.1, R.sup.2, R.sup.3, R, R', R'', R.sup.A, and R.sup.B is independently hydrogen or a substituent; and any two of R.sup.1, R.sup.2, R.sup.3, R, R', R'', R.sup.A, and R.sup.B can be joined or fused together to form a ring. Further provided are OLEDs and related consumer products that utilize these compounds.