Universal Display Corporation
HOST MATERIALS FOR ELECTROLUMINESCENT DEVICES

Abstract:

A compound having a stoichiometry formula of BiL.sub.3, where each L has a formula of ##STR00001## where each Z.sup.1 and Z.sup.2 is O, S, NR, or PR; Z.sup.3 is C; Z.sup.1, Z.sup.2, the single dashed line represent a bond to Bi; and n is an integer. In these structures, L.sub.A can be aryl or heteroaryl, which can be substituted. Substituents R.sub.L, R, L.sub.C, and R.sub.LC can be selected from a variety of substituents. In the first formula, at least one of the following is true: (1) L.sub.A includes a 5-membered ring; (2) L.sub.A includes a condensed ring system of at least three rings; (3) at least one R.sub.L is a non-fused aryl or heteroaryl moiety; or (4) n is at least 2 with two different R.sub.L's and L.sub.A-(R.sub.L)n is assymmetrical. Organic light emitting devices, consumer products, formulations, and chemical structures containing the compounds are also disclosed.