# US 8,785,918 B2 · Organic light emitting device and organic light emitting display device using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,785,918 B2 - Document ID: US8785918B2 - Status: Granted - Kind: B2 - Application number: 13/727,260 - Filed: 2012-12-26 - Published: 2014-04-17 - Granted: 2014-07-22 - Earliest claimed: 2012-10-15 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Se Hee Lee; Kwan Soo Kim; Sang Dae Kim - Web page: https://patentgrep.com/patent/US8785918B2 ## CPC - H10K 85/615: {Polycyclic condensed aromatic hydrocarbons, e.g. anthracene} - H10K 50/828: Transparent cathodes, e.g. comprising thin metal layers - H10K 85/657: {Polycyclic condensed heteroaromatic hydrocarbons} - H10K 50/16: Electron transporting layers - H10K 50/171: {Electron injection layers} - H10K 59/12: Active-matrix OLED [AMOLED] displays - H10K 85/30: Coordination compounds - H10K 85/342: {comprising iridium} - H10K 85/6572: {comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole} - H10K 2102/103: {comprising indium oxides, e.g. ITO} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract Disclosed is a an organic light emitting device including a first electrode and a second electrode; and an organic layer formed between the first electrode and the second electrode, in which the organic layer includes a compound represented by Formula 1 and the second electrode is a double-layer structure comprised of LiF:Mg. Accordingly, an organic light emitting device which has excellent voltage efficiency and emission efficiency and may improve service-life characteristics, and an organic light emitting display device using the same may be provided. ## Claims ### Claim 1 An organic light emitting device, comprising: a first electrode and a second electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer comprises a compound represented by the following Formula 1, and the second electrode is a double layer comprised of LiF:Mg: where, R1 and R2 are each independently or simultaneously a group derived from the group consisting of a hydrogen atom, an aliphatic hydrocarbon having 1 to 20 carbon atoms, phenyl, naphthyl, biphenyl, anthracenyl, an aromatic heterocyclic ring, or an aromatic ring, Ar is a group derived from the group consisting of phenyl, naphthyl, biphenyl, anthracenyl, an aromatic heterocyclic ring, or an aromatic ring, R3 is a group derived from the group consisting of a hydrogen atom, an alkyl group or aliphatic hydrocarbon having 1 to 6 carbon atoms, a substituted phenyl, naphthyl, biphenyl, anthracenyl, an aromatic heterocyclic ring, or an aromatic ring, X is NR4, a sulfur atom, or an oxygen atom, and R4 is a group derived from a hydrogen atom, an alkyl group or aliphatic hydrocarbon having 1 to 7 carbon atoms, phenyl, naphthyl, biphenyl, anthracenyl, or an aromatic heterocyclic ring. ### Claim 2 (depends on 1) The organic light emitting device of claim 1, wherein the second electrode is a double layer structure in which Ag:Mg is formed on the upper portion of LiF:Mg. ### Claim 3 (depends on 1) The organic light emitting device of claim 1, wherein the second electrode is formed at LiF:Mg=1:0.2 to 1:5. ### Claim 4 (depends on 1) The organic light emitting device of claim 1, wherein the second electrode is a structure in which LiF:Mg is formed to have about 10 to about 50 Å. ### Claim 5 (depends on 2) The organic light emitting device of claim 2, wherein the second electrode is a structure in which Ag:Mg is formed at 1:1 to 9:1. ### Claim 6 (depends on 2) The organic light emitting device of claim 2, wherein the second electrode is a structure in which Ag:Mg is formed from about 100 Å to about 300 Å. ### Claim 7 (depends on 1) The organic light emitting device of claim 1, wherein the organic layer comprises at least one layer selected from the group consisting of a hole injection layer, a hole transporting layer, an electron blocking layer, an emission layer, a hole blocking layer, an electron transporting layer and an electron injection layer, and the compound represented by Formula 1 is included in the electron injection layer or the electron transporting layer. ### Claim 8 (depends on 7) The organic light emitting device of claim 7, further comprising a lithium quinolate (LiQ) monomer or Lithium quinolate (LiQ) trimer in one of the electron injection layer or the electron transporting layer. ### Claim 9 (depends on 1) The organic light emitting device of claim 1, wherein the second electrode has a work function of 4.1 eV to 4.7 eV. ### Claim 10 (depends on 1) The organic light emitting device of claim 1, wherein the first electrode is formed with a multilayer structure in which one opaque conductive material of aluminum (Al), silver (Ag) and magnesium (Mg), and a transparent conductive material comprising one of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium gallium zinc oxide (IGZO) and In2O3 are stacked. ### Claim 11 An organic light emitting display device, comprising: a substrate on which an active area having a plurality of pixel areas is defined; a driving thin film transistor disposed on each of the plurality of pixel areas; a passivation layer disposed on the driving thin film transistor; a first electrode connected to a drain electrode exposed by a contact hole formed on the passivation layer; an organic layer disposed on the first electrode and comprising a compound represented by the following Formula 1; and a second electrode which is disposed on the organic layer and is a double-layer comprised of LiF:Mg: where, R1 and R2 are each independently or simultaneously a group derived from the group consisting of a hydrogen atom, an aliphatic hydrocarbon having 1 to 20 carbon atoms, phenyl, naphthyl, biphenyl, anthracenyl, an aromatic heterocyclic ring, or an aromatic ring, Ar is a group derived from the group consisting of phenyl, naphthyl, biphenyl, anthracenyl, an aromatic heterocyclic ring, or an aromatic ring, R3 is a group derived from the group consisting of a hydrogen atom, an alkyl group or aliphatic hydrocarbon having 1 to 6 carbon atoms, a substituted phenyl, naphthyl, biphenyl, anthracenyl, an aromatic heterocyclic ring, or an aromatic ring, X is NR4, a sulfur atom, or an oxygen atom, and R4 is a group derived from a hydrogen atom, an alkyl group or aliphatic hydrocarbon having 1 to 7 carbon atoms, phenyl, naphthyl, biphenyl, anthracenyl, or an aromatic heterocyclic ring.