Light-emitting compound

Abstract

An unsubstituted or substituted phosphorescent compound of formula (I): Wherein: M is a transition metal; L in each occurrence is independently a mono- or poly-dentate ligand; R8 is H or a substituent; R9 and R10 are each independently selected from the group consisting of branched, linear or cyclic C1-20 alkyl wherein non-adjacent C atoms of the C1-20 alkyl may be replaced with —O—, —S—, —NR12—, —SiR122— or —COO— and one or more H atoms may be replaced with F or —NR122, wherein R12 is H or a substituent; R11 in each occurrence is independently H or a substituent, wherein two groups R11 may be linked to form a ring; x is at least 1; y is 0 or a positive integer; and z1, z2 and z3 are each independently 0 or a positive integer.

Dependencies are inferred from the claim text.