Patent ID: 7291404

Claim:
An electroluminescent device comprising an anode, a cathode, a buffer layer in contact with said anode, and a luminescent region provided between said anode and cathode, said luminescent region comprising; an electron injection and transporting zone and at least one of a hole injection and transporting zone and a mixed charge transport layer, wherein said electron injection and transporting zone and/or said mixed charge transporting layer comprises an azole compound of the formula (1): wherein one X represents N and the other X represents CH or N; Y is an atom or a group selected from the group consisting of O, S, and —N(R)—, wherein R is a hydrocarbyl group of from 1 to about 30 carbons; R 1 and R 2 are each a substituent selected from the group consisting of hydrogen, an alkyl group of from 1 to about 25 carbon atoms, an aryl group of about 6 to about 30 carbon atoms, an alkoxy group of from 1 to about 25 carbon atoms, a halogen, and a cyano group; and Ar is an aromatic component.