Universal Display Corporation
ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES

Abstract:

A compound of Formula I ##STR00001## wherein X.sup.1, X.sup.2, X.sup.3, and X.sup.4 are independently selected from the group consisting of CR.sup.A and N; X.sup.5, X.sup.6, X.sup.7, and X.sup.8 are independently selected from the group consisting of CR.sup.B and N; Y is selected from the group consisting of NR.sup.2, O, S, CR.sup.3R.sup.4, SiR.sup.3R.sup.4 and GeR.sup.3R.sup.4; Z is selected from the group consisting of B, SiR.sup.5, and GeR.sup.6; wherein R.sup.A and R.sup.B represent mono to the maximum allowable substitution, or no substitution; and R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are independently selected from the group consisting of hydrogen, deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, silyl, aryl, heteroaryl, acyl, nitrile, and combinations thereof. The compounds of Formula I will have at least one of R.sup.A, R.sup.B, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 that comprises a structure selected from the group consisting of: ##STR00002## wherein X is selected from the group consisting of NR.sup.7, O, S and Se; and X.sup.9--X.sup.41 are each independently selected from the group consisting of C and N; and at least one of X.sup.34--X.sup.41 is N. We also describe an OLED comprising an organic layer that includes a compound of Formula I and a consumer product that includes the OLED.