Universal Display Corporation
ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES

Abstract:

A compound having a formula (L.sub.A).sub.mIr(L.sub.B).sub.3-m having a structure selected from ##STR00001## is disclosed. In the structures of formula (L.sub.A).sub.mIr(L.sub.B).sub.3-m, m is 1 or 2, R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are each independently selected from hydrogen, deuterium, C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated variants thereof, and partially or fully fluorinated variants thereof, and, R.sup.6 is selected from C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated variants thereof, and partially or fully fluorinated variants thereof.