Patent ID: 7147938

Claim:
An electroluminescent device including a light-emitting layer containing a host material and: (a) a compound of Formula (1): X 1 —Ar 1 —C(R 1 )═C(R 2 )—Ar 2 (1) wherein: Ar 1 represents a divalent aromatic group; Ar 2 represents an aromatic group; X 1 represents at least one electron-donating group; R 1 and R 2 independently represent hydrogen or a substituent; and (b) a light-emitting boron complex having an absorption spectrum that overlaps with the emission spectrum of compound (1) wherein the boron complex is represented by Formula (6): wherein: Ar a and Ar b each independently represent the atoms necessary to form a heteroaromatic ring group; Y represents N or C—X, wherein X represents hydrogen or a substituent; and G a and G b represent independently selected substituents.