Patent ID: 7648779

Claim:
An electroluminescent device comprising: an anode comprising an anode material; a cathode comprising a cathode material; at least one light-emitting layer between the anode and the cathode; and wherein the anode material has a work function less than or equal to the work function of the cathode material and wherein at least one layer between the anode and cathode comprises a chemical compound of Formula I: wherein R 1 -R 6 are independently chosen from the group consisting of hydrogen, halo, nitrile (—CN), nitro (—NO 2 ), sulfonyl (—SO 2 R), sulfoxide (—SOR), sulfonamide (—SO 2 NR), sulfonate (—SO 3 R), trifluoromethyl (CF 3 ), ester (—CO—OR), arnide (—CO—NHR or —CO—NRR′), straight-chain or branched (substituted or unsubstituted) C 1 -C 12 alkoxy, straight-chain or branched (substituted or unsubstituted) C 1 -C 12 alkyl, aromatic or non-aromatic (substituted or unsubstituted) heterocyclic, substituted or unsubstituted aryl, mono- or di-(substituted or unsubstituted)aryl-amine, and (substituted or unsubstituted)alkyl-(substituted or unsubstituted)aryl-amine.