Patent ID: 8206842

Claim:
An electroluminescent device comprising a cathode, an anode, and having therebetween a light-emitting layer comprising: (a) a boron complex represented by Formula (I), wherein: X represents hydrogen or a substituent; V 1 through V 8 represent hydrogen or an independently selected substituent, provided that adjacent substituents cannot join together to form an aromatic ring group and provided at least one of V 2 and V 3 represents a substituent; L 1 and L 2 represent independently selected substituents; wherein X, V 1 through V 8 , L 1 and L 2 are chosen such that the boron complex represented by Formula (I), when dissolved in ethyl acetate at a concentration of less then 10 −3 molar, has a maximum fluorescence emission between a wavelength of 425 nm and 435 nm and a quantum yield of 0.70 to 1.0; and (b) an anthracene compound containing an anthracene nucleus substituted in the 9- and 10-positions with independently selected aryl groups containing from 6 to 24 carbon atoms, and wherein the anthracene nucleus can be further substituted provided the anthracene nucleus does not contain an aromatic substituent in positions 1-8, wherein the light-emitting layer emits blue light.