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.
Claims21
An electroluminescent device, comprising:
- a cathode;
- an anode opposing the cathode, the anode comprising a material selected from a group consisting of aluminum and silver;
- and
- a functional layer located between the anode and cathode, the functional layer comprising 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), amide (—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)arylamine, and (substituted or unsubstituted)alkyl-(substituted or unsubstituted)arylamine.
Dependencies are inferred from the claim text.