Universal Display Corporation
ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES

Abstract:

Compound of Formula I, ##STR00001## is provided. In Formula I, rings A, B, C, and D are 5- or 6-membered rings; each of X.sup.1-X.sup.5, X.sup.21-X.sup.22, and Z.sup.1-Z.sup.3 is C or N; each of L.sup.1, L.sup.2, and L.sup.3 is selected from a direct bond or a divalent linker; each of a and b is 0 or 1; Y is 0, S, Se, or NR.sup.Y; W is O, S, NR.sup.W, C.dbd.R.sup.W, or CR.sup.WR.sup.W'; up to 1 of Z.sup.1 to Z.sup.3 is N; each R, R', R.sup.A, R.sup.B, R.sup.C, R.sup.D, R.sup.Y, R.sup.W, and R.sup.W' is hydrogen or a substituent. Formulations, OLEDs, and consumer products containing the same are also disclosed.