# US 2013/0153867 A1 · Organic light emitting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153867 A1 - Document ID: US20130153867A1 - Status: Published application - Kind: A1 - Application number: 13/683,471 - Filed: 2012-11-21 - Published: 2013-06-20 - Earliest claimed: 2011-12-16 - Assignees: LG Display Co., Ltd. - Inventors: Jeong-Dae SEO; Chang-Wook HAN; Yoon-Heung TAK; Hyo-Seok KIM; Eun-Ju JEON; Hye-Seung KANG - Web page: https://patentgrep.com/patent/US20130153867A1 ## CPC - H10K 85/622: {containing four rings, e.g. pyrene} - H10K 50/19: Tandem OLEDs - H10K 85/633: {comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom} - H10K 50/14: Carrier transporting layers - H10K 85/324: {comprising aluminium, e.g. Alq3} - H10K 85/342: {comprising iridium} - H10K 85/654: {comprising only nitrogen as heteroatom (H10K85/652 takes precedence)} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract Discussed is an organic light emitting device that exhibits improved efficiency and driving voltage by applying a novel material facilitating charge generation to a charge generation layer. The charge generation layer contains a compound represented by the following formulae: wherein R1, R2, R3, R4, R5, R6, R7 and R8 are optionally substituted and are independently selected from an aromatic group having 6 to 20 carbon atoms, and R9 and R10 are independently selected from hydrogen, an optionally substituted aromatic ring having 6 to 20 carbon atoms and an optionally substituted heterocyclic compound having 3 to 17 carbon atoms and one or more elements of N, S and P. ## Claims ### Claim 1 An organic light emitting device comprising: a first electrode and a second electrode opposing each other; a plurality of stacks interposed between the first electrode and the second electrode, each stack comprising a light emitting layer; and a charge generation layer to connect the adjacent stacks, wherein the charge generation layer at least comprises a first organic substance having an electron-withdrawing substituent and a second organic substance capable of injecting holes. ### Claim 2 (depends on 1) The organic light emitting device according to claim 1, wherein the first organic substance has one or more substituents of CN, NO2 and F, and the second organic substance has a fused aromatic group having tertiary amine as a substituent. ### Claim 3 (depends on 1) The organic light emitting device according to claim 1, wherein each stack further comprises a first common layer and a second common layer provided on and under the light emitting layer, respectively. ### Claim 4 (depends on 1) The organic light emitting device according to claim 1, wherein the light emitting layers emit light having a different color such that the mixed light emitted from the organic light emitting device appears white. ### Claim 5 (depends on 1) The organic light emitting device according to claim 1, wherein the second organic substance capable of injecting holes comprises a pyrene core and two or four tertiary amine substituents. ### Claim 6 (depends on 3) The organic light emitting device according to claim 3, wherein the second organic substance capable of injecting holes is at least one compound represented by the following Formulae 1 to 3: wherein R1, R2, R3, R4, R5, R6, R7 and R8 are optionally substituted and are independently selected from an aromatic group having 6 to 20 carbon atoms, and R9 and R10 are independently selected from the group consisting of hydrogen, an optionally substituted aromatic ring having 6 to 20 carbon atoms, and an optionally substituted heterocyclic compound having 3 to 17 carbon atoms and one or more elements of N, S and P. ### Claim 7 (depends on 6) The organic light emitting device according to claim 6, wherein the volume of the at least one of the compounds of Formulae 1 to 3 contained in the charge generation layer is 20 to 60% of the total volume of organic substances constituting the charge generation layer. ### Claim 8 (depends on 6) The organic light emitting device according to claim 6, wherein the charge generation layer has a thickness of 75 Å to 250 Å. ### Claim 9 (depends on 6) The organic light emitting device according to claim 6, wherein the first organic substance having an electron withdrawing group is HAT-CN. ### Claim 10 (depends on 3) The organic light emitting device according to claim 3, wherein a sublayer of the second common layer adjacent to the charge generation layer is an n-type organic layer. ### Claim 11 (depends on 6) The organic light emitting device according to claim 6, wherein the first common layer comprises at least one compound represented by Formulae 1-3. ### Claim 12 (depends on 7) The organic light emitting device according to claim 7, wherein the volume of the first organic substance having an electron-withdrawing substituent contained in the charge generation layer is 80 to 40% of the total volume of organic substances constituting the charge generation layer. ### Claim 13 (depends on 6) The organic light emitting device according to claim 6, wherein the at least one of the compounds of Formulae 1 to 3 are selected from the group consisting of: ### Claim 14 (depends on 6) The organic light emitting device according to claim 6, wherein the at least one of the compounds of Formulae 1 to 3 are selected from the group consisting of: ### Claim 15 An organic light emitting device comprising: a first electrode and a second electrode opposing each other; a plurality of stacks interposed between the first electrode and the second electrode, each stack comprising a light emitting layer; and a charge generation layer to connect the adjacent stacks, wherein the organic light emitting device comprises at least one compound represented by the following Formulae 1 to 3: wherein R1, R2, R3, R4, R5, R6, R7 and R8 are optionally substituted and are independently selected from an aromatic group having 6 to 20 carbon atoms, and R9 and R10 are independently selected from the group consisting of hydrogen, an optionally substituted aromatic ring having 6 to 20 carbon atoms, and an optionally substituted heterocyclic compound having 3 to 17 carbon atoms and one or more elements of N, S and P. ### Claim 16 (depends on 15) The organic light emitting device according to claim 15, wherein R1 to R8 are independently selected from an aromatic group substituted by an alkyl group or a halogen. ### Claim 17 (depends on 16) The organic light emitting device according to claim 16, wherein the alkyl group has 1 to 6 carbon atoms. ### Claim 18 (depends on 15) The organic light emitting device according to claim 15, wherein the halogen is F, Cl, Br or I.