Electroluminescent devices with low work function anode
AssigneeLG Chem, Ltd.
InventorsSe-Hwan Son, Jun-Gi Jang, Sang-Young Jeon, Seok-Hee Yoon, Jae-Chol Lee, Kong-Kyeum Kim
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Abstract
Disclosed are organic electroluminescent devices employing materials of a low reduction potential in a layer functioning hole-injection. The organic electroluminescent devices may employ an anode material having a relatively low work function. Aluminum may be used in anode. During the operation, the organic electroluminescent devices may form a virtual electrode in their internal area, which enhances injection of carriers from a nearby electrode. Use of aluminum in the anode helps construction of cathode-emission organic electroluminescent devices.
Claims13
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 R1-R6 are independently chosen from the group consisting of hydrogen, halo, nitrile (—CN), nitro (—NO2), sulfonyl (—SO2R), sulfoxide (—SOR), sulfonamide (—SO2NR), sulfonate (—SO3R), trifluoromethyl (CF3), ester (—CO—OR), arnide (—CO—NHR or —CO—NRR′), straight-chain or branched (substituted or unsubstituted) C1-C12 alkoxy, straight-chain or branched (substituted or unsubstituted) C1-C12 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.
Dependencies are inferred from the claim text.