Universal Display Corporation
Organic electroluminescent materials and devices

Abstract:

A compound having a structure of Formula I: ##STR00001## is described. In the structure of Formula I, R.sup.A, R.sup.B, and R.sup.C are each independently 5 or 6 membered aryl or heteroaryl rings; R.sup.1, R.sup.2, R.sup.3, and A are selected from a variety of substituents, including being joined or fused to form a ring; A is optionally bonded to at least one benzo or azabenzo ring to form fused rings; X.sup.1 is B, C, N, O, S or Se; and X.sup.2-X.sup.7 are independently B, C or N. Formulations and devices, such as an OLEDs, that include the compound containing a structure of Formula I are also described.