- To improve the efficiency of thermally activated delayed fluorescence OLEDs by controlling the horizontal orientation through optimizing stereoscopic and linear structures of indolocarbazole isomers
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Molecular structures play a critical role in forming the horizontal orientation of the emission transition dipole of light-emitting TADF materials which can improve the light outcoupling efficiency of OLEDs. Here, two TADF emitters of IndCzpTr-1 and IndCzpTr-2 based indolocarbazole derivatives with stereoscopic and linear structures were designed and synthesized. With a smaller ΔEST, better thermal stability and preferential horizontal orientation with an orientation order parameter S of -0.264, a green TADF OLED device based on IndCzpTr-2 realized a maximum EQE of 30.0% and maximum current efficiency (CE) of 82.6 cd A-1 without using any optical outcoupling technology; meanwhile, a sky-blue TADF OLED with a maximum EQE of 14.5% and a maximum CE of 28.1 cd A-1 was obtained for IndCzpTr-1 with a homologous device structure.
- Xiang, Songpo,Lv, Xialei,Sun, Shuaiqiang,Zhang, Qing,Huang, Zhi,Guo, Runda,Gu, Honggang,Liu, Shiyuan,Wang, Lei
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Read Online
- ORGANIC COMPOUNDS AND ORGANIC ELECTRO LUMINESCENCE DEVICE COMPRISING THE SAME
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The present invention relates to a novel compound and an organic electroluminescent device comprising the same. The compound according to the present invention is used in an organic layer, preferably a light emitting layer of an organic electroluminescent device, thereby improving light emitting efficiency, driving voltage, lifespan, and the like of the organic electroluminescent device.
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- Organic compound as well as electronic element and device using same
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The invention relates to the technical field of organic materials, and provides an organic compound as well as an electronic element and an electronic device using the same. The structure of the organic compound is composed of a chemical formula I and a chemical formula II. When the organic compound is used for a light-emitting layer of an organic electroluminescencedevice, the efficiency of the device can be effectively improved, and the service life of the organic electroluminescence device is prolonged.
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Paragraph 0028; 0235-0236; 0258
(2021/05/19)
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- Novel hetero-cyclic compound and organic light emitting device comprising the same
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The present invention provides a novel heterocyclic compound and an organic light emitting device using the same.
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Paragraph 0183-0186
(2021/06/01)
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- Nitrogen-containing compound and electronic component comprising nitrogen-containing compound and electronic device
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The invention provides a nitrogen-containing compound and an electronic component comprising nitrogen-containing compound and an electronic device, and belongs to the technical field of organic electroluminescence. The nitrogen-containing compound has a polycyclic conjugation characteristic, a condensed indolocarbazole parent structure, high bond energy between atoms and good thermal stability, is beneficial to solid-state accumulation between molecules, and shows long service life as a luminescent layer material in an organic electroluminescent device. The structure is formed by connecting a benzoxazole or benzothiazole group and a nitrogen-containing group (triazine, pyridine and pyrimidine) through a mother nucleus structure of a fused aromatic ring; the combination enables the partial structure to have high dipole moment, so that the polarity of the material is improved. When the nitrogen-containing compound is used as a luminescent layer material of an organic electroluminescent device, the electronic transmission performance of the device is effectively improved, the luminous efficiency of the device is improved, and the service life of the device is prolonged.
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Paragraph 0205-0208
(2021/06/26)
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- Organic compound, electronic component using same, and electronic device
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The application relates to an organic compound and an electronic element and an electronic device using the same, wherein the compound is fixedly connected 4 - phenanthryl in the indole carbazole parent nucleus compound, and the compound achieves a high first triplet energy level. The transport and recombination of carriers can be ensured and the exciton energy is efficiently transferred to the guest material. When the compound is used for the light emitting layer host material of the device, the device has excellent luminous efficiency. On the other hand, the compound has good exciton resistance, and the service life of the device can be prolonged.
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Paragraph 0180-0182
(2021/12/07)
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- NOVEL COMPOUND AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE SAME
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The present invention provides a novel compound and an organic light emitting device using the same.
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Paragraph 0231-0234
(2021/06/22)
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- ORGANIC OPTOELECTRONIC DEVICE AND DISPLAY DEVICE
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The invention provides an organic photoelectric device and a display device. An organic optoelectronic device and a display device including the same are disclosed. The organic photoelectric device includes an anode and a cathode opposite to each other, a light emitting layer between the anode and the cathode, a hole transport layer between the anode and the light emitting layer, and a hole transport auxiliary layer between the light emitting layer and the hole transport layer, wherein the light emitting layer includes a composition including a first compound represented by Chemical Formula 1and a second compound represented by Chemical Formula 2, and the hole transport auxiliary layer includes a third compound represented by Chemical Formula 3. Detailed description of Chemical Formulae 1to 3 is the same as described in the specification.
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Paragraph 0345-0348
(2021/04/20)
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- Deuterated organic compounds for organic light-emitting diode and organic light-emitting diode including the same
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The present invention relates to an organic electroluminescent compound represented by chemical formula A and an organic light emitting device comprising the same. Substituents Y, Ar2 , L3 , K, p and x are as defined in the description of the invention. [Chemical A] (by machine translation)
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- Compound taking spirofluorene anthrone as core, preparation method and applications thereof
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The invention relates to a compound taking spirofluorene anthrone as a core, a preparation method and applications thereof, wherein the structure of the compound is formed by linking spirofluorene anthrone to a five-membered ring fused ring structure, and the whole molecule is a large rigid structure and has a high triplet state energy level (T1). According to the invention, the compound is high in structural stereoscopicity, large in steric hindrance and not easy to rotate, so the chemical stability of the material is improved, and the compound has high glass transition temperature and high molecular thermal stability; the HOMO distribution position and the LUMO distribution position of the compound are separated from each other, so that the compound has appropriate HOMO and LUMO energy levels; and with the application of the compound in an OLED device, the light emitting efficiency and the service life of the device can be effectively improved.
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Paragraph 0089; 0091-0092; 0095; 0109; 0111
(2020/03/09)
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- COMPOUND FOR ORGANIC ELECTRIC ELEMENT AND ORGANIC ELECTRIC DEVICE COMPRISING THE SAME
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The present invention relates to a compound for an organic electronic element and an organic electronic element using the same. To the present invention, an organic electronic element having high luminous efficiency, low driving voltage, and high heat resistance can be provided and the color purity and lifetime of the organic electronic element can be improved. (by machine translation)
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Paragraph 0363-0365; 0368-0369; 0396-0397; 0400
(2020/11/28)
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- Nitrogen-containing polycyclic compound and organic light emitting element using same
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The present application relates to a polycyclic compound including nitrogen and an organic light emitting device including the same.
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- Terpyridine derivative and preparation method and application thereof as well as device
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The invention belongs to the field of application science and technology of organic photoelectric materials, and particularly relates to a terpyridine derivative and a preparation method and application thereof as well as a device. The derivative provided by the invention is characterized by being mainly based on a terpyridine core, peripherally using a carbazole derivative and the like to regulate appropriate electron donating ability, and transforming different bridging groups through a D-A structure design to regulate the appropriate distribution of highest occupied molecular orbital (HOMO)and lowest unoccupied molecular orbital (LUMO); the derivative is mainly applied to TADF guest materials, host materials and carrier transport materials.
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- COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT COMPRISING THE SAME, AND ELECTRONIC DEVICE THEREOF
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Disclosed are an organic electronic element comprising: a compound represented by chemical formula 1; a first electrode; a second electrode; and an organic layer located between the first electrode and the second electrode, and an electronic device comprising the organic electronic element. By comprising the compound represented by chemical formula 1 in the organic layer, it is possible to lower a driving voltage, improve luminous efficiency, and expand lifespan of the organic electronic element.COPYRIGHT KIPO 2019
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Paragraph 0101; 0102; 0103; 0109; 0110
(2019/08/28)
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- Novel compound and organic light emitting device comprising the same
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The present invention provides a novel compound and an organic light emitting device comprising the same. The compound represented by chemical formula 1 can be used as a material of an organic material layer of the organic light emitting device, and can improve efficiency, low driving voltage, and/or lifespan characteristics of the organic light emitting device.COPYRIGHT KIPO 2020
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Paragraph 0178-0181; 0185-0187
(2020/03/04)
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- ORGANIC COMPOUND AND COMPOSITION AND ORGANIC OPTOELECTRONIC DEVICE AND DISPLAY DEVICE
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The present invention relates to an organic compound represented by chemical formula 1, a composition comprising the same, an organic optoelectronic device, and a display device. In the chemical formula 1, X^1, X^2, Ar^1, Ar^2, L^1 and R^1 to R^6 are as described in the specification. An embodiment provides the organic compound capable of implementing a high-efficiency and long-lived organic optoelectronic device.COPYRIGHT KIPO 2019
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Paragraph 0397-0402
(2019/04/30)
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- ORGANIC COMPOUND AND COMPOSITION AND ORGANIC OPTOELECTRONIC DEVICE AND DISPLAY DEVICE
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The present invention relates to: an organic compound expressed by a combination of chemical formula 1 and chemical formula 2; a composition comprising the same; an organic optoelectronic device; and a display apparatus. In the chemical formula 1 or the chemical formula 2, X^1, X^2, L^1, L^2, R^1, R^2, and R^3 to R^6 are as defined in the specification. An embodiment provides the organic compound capable of realizing the organic optoelectronic device having high-efficiency and a long lifespan.COPYRIGHT KIPO 2019
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Paragraph 0407-0411
(2019/05/18)
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- ORGANIC COMPOUND AND COMPOSITION AND ORGANIC OPTOELECTRONIC DEVICE AND DISPLAY DEVICE
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Disclosed are an organic compound represented by Chemical Formula 1, a composition including the same, an organic optoelectronic device, and a display device. In Chemical Formula 1, X1 to X3, Y1 to Y3, and R1 to R18 are the same as described in the detailed description.
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Paragraph 0165-0167
(2019/07/11)
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- Synthesis method of 11,12-dihydro-11-phenylindole [2,3-a]carbazole
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The invention discloses a production method of 11,12-dihydro-11-phenylindole [2,3-a]carbazole. The method belongs to the field of organic chemical synthesis, and comprises the steps of adopting 1-amino-N-phenylcarbazole as a starting material, and carrying out bromination reaction, Suzuki coupling reaction and Buchwald coupling reaction to synthesize the 11,12-dihydro-11-phenylindole [2,3-a]carbazole. During the reaction process, the method is less in side reaction, simple to operate and high in yield. The synthesized 11,12-dihydro-11-phenylindole [2,3-a]carbazole can be applied to the fieldssuch as organic optoelectronic materials and medicines, and is an important intermediate for carbazole photoelectric materials, medicines and pesticides.
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Paragraph 0011; 0013; 0014
(2018/07/15)
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- COMPOUND FOR ORGANIC OPTOELECTRIC DEVICE, COMPOSITION FOR ORGANIC OPTOELECTRIC DEVICE AND ORGANIC OPTOELECTRIC DEVICE AND DISPLAY DEVICE
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Disclosed are a compound for an organic optoelectric device represented by Chemical Formula 1, a composition for an organic optoelectric device, an organic optoelectric device including the same, and a display device. Details of Chemical Formula 1 are the same as those defined in the specification.
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Paragraph 0161; 0162
(2018/04/20)
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- Novel hetero-cyclic compound and organic light emitting device comprising the same
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The present invention provides a novel indolocarbazole compound and an organic light emitting device comprising the same. The indolocarbazole compound of the present invention is represented by chemical formula 1. The compound represented by chemical formula 1 can be used as a material of an organic material layer of an organic light emitting device, and can improve the efficiency, the driving voltage and/or the lifetime characteristics of the organic light emitting device.COPYRIGHT KIPO 2018
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Paragraph 0120-0122
(2018/05/15)
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- COMPOSITION FOR ORGANIC OPTOELECTRIC DEVICE AND ORGANIC OPTOELECTRIC DEVICE AND DISPLAY DEVICE
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Disclosed are a composition for an organic optoelectric device including at least one of a first host compound represented by a combination of Chemical Formula 1 and Chemical Formula 2, and at least one of a second host compound represented by Chemical Formula 3, and an organic optoelectric device including the same, and a display device. Details of Chemical Formulae 1 to 3 are the same as described in the detailed description.
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Paragraph 0137
(2018/03/25)
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- Organic electroluminescent element
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Provided is an organic electroluminescent device (EL device) using an indolocarbazole compound. The organic EL device is obtained by laminating an anode, a plurality of organic layers including a phosphorescent light-emitting layer, and a cathode on a substrate, and the phosphorescent light-emitting layer, a hole-transporting layer, an electron-transporting layer, a hole-blocking layer, or an electron-blocking layer contains an indolocarbazole compound represented by the general formula (1). In the general formula (1), a ring I and a ring II represent rings represented by the formula (1a) and the formula (1b) to be fused to adjacent rings, As each represent C—R or N and at least one of As represents N, Ls each represent a substituted or unsubstituted aromatic hydrocarbon group, or a substituted or unsubstituted aromatic heterocyclic group, and at least one of Ls represents a two- to four-ring fused heterocyclic group, Rs each represent an aliphatic hydrocarbon group, an aromatic hydrocarbon group, or an aromatic heterocyclic group, ps each represent an integer of from 0 to 4, q represents an integer of from 0 to 2, r represents an integer of from 1 to 4, X1 to X4 each represent an aromatic hydrocarbon group or an aromatic heterocyclic group, and l, m, and n each represent an integer of from 0 to 5.
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Page/Page column 304; 306
(2018/06/08)
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- Compound adopting dimethylanthrone as core, and application thereof in organic electroluminescent devices
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The invention discloses a compound adopting dimethylanthrone as a core, and an application thereof in organic electroluminescent devices. The compound adopting the dimethylanthrone as the core and heteroarylcarbazole as a branched chain has the characteristics of difficulty in intermolecular crystallization, difficulty in aggregation and good electrochemical stability. When the compound is used as the luminescent layer material of the organic electroluminescent devices, the current efficiency of the devices is greatly improved, and the life of the devices is obviously prolonged.
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- HETERO-CYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
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The present invention provides a hetero-cyclic compound capable of greatly improving lifespan, efficiency, electrochemical stability, and thermal stability of an organic light emitting device, and an organic light emitting device where the hetero-cyclic compound is contained in the organic compound layer. The hetero-cyclic compound is represented by chemical formula 1.COPYRIGHT KIPO 2017
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- Benzimidazole ketone compound and application of compound on OLED (Organic Light Emitting Diode) device
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The invention discloses a benzimidazole ketone compound and an application of the compound on an organic light emitting diode (OLED) device. The compound takes benzimidazole ketone as a core and has the characteristics of difficult intermolecular crystallization, difficult intermolecular aggregation and good film-forming property. When the compound is used as a main material of a light emitting layer of the OLED device, the current efficiency, the power efficiency and the external quantum efficiency of the device are greatly improved; and the service life of the device is obviously prolonged.
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Paragraph 0056; 0057; 0058; 0059; 0060; 0061
(2017/07/23)
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- N hetero dicarbazyl compound, preparation method of N hetero dicarbazyl compound, intermediate, application and organic electroluminescence device
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The invention relates to the field of organic electroluminescence and particularly relates to an N hetero dicarbazyl compound, a preparation method of the N hetero dicarbazyl compound, an intermediate, an application and an organic electroluminescence device. The N hetero dicarbazyl compound is a compound as shown in the formula (1). The provided N hetero dicarbazyl compound can serve as a material for forming the organic electroluminescence device, particularly a material in an electron transmission layer and/or luminescent layer, so that the performances of the organic electroluminescence device are improved, for example, the service life is prolonged, and the efficiency and the brightness are improved.
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Paragraph 0152; 0153; 0154; 0155; 0166-0168
(2017/08/30)
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- An electroluminescent compound and an electroluminescent device comprising the same
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The present invention relates to an organic light emitting compound employed in an organic electroluminescent device. The organic light emitting compound is represented by chemical formula 1 or chemical formula 2. In addition, the organic electroluminescent device having excellent light emitting properties such as driving voltage, brightness, long lifespan, and the like is implemented when employing the organic light emitting compound as a phosphorescent host compound inside a hole transport functional layer or a light emitting layer.COPYRIGHT KIPO 2016
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Paragraph 0180; 0880-0882
(2016/10/07)
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- An electroluminescent compound and an electroluminescent device comprising the same
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The present invention relates to an organic light emitting compound adopted to an organic electroluminescent device. The organic light emitting compound is represented by chemical formula 1. When adopting the organic light emitting compound as a dopant compound or a hole transfer compound in a luminous layer, the organic electroluminescent device has excellent light emitting characteristics such as operating voltage, brightness, long lifespan, and the like.COPYRIGHT KIPO 2016
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Paragraph 0197; 0269; 0282-0284
(2016/10/09)
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- HETERO-CYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
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The present invention refers to heterocyclic and optical material using it relates to an organic light emitting device. (by machine translation)
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Paragraph 0189; 0191; 0195; 0196
(2016/10/07)
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- HETERO-CYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
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In the present invention, provided are: a heterocyclic compound which can significantly extend lifespan and improve efficiency, electrochemical stability, and thermal stability of the organic light-emitting device; and an organic light-emitting device containing the heterocyclic compound in an organic compound layer. The heterocyclic compound is represented by chemical formula 1.COPYRIGHT KIPO 2016
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Paragraph 0192-0193; 0196-0197
(2016/10/08)
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- Polycyclic compound including nitrogen and organic light emitting device using same
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The present invention relates to a polycyclic compound including nitrogen and an organic light emitting device using the same.
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Paragraph 0252; 0257; 0258
(2016/10/10)
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- HETERO-CYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
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The present invention relates to a novel hetero-cyclic compound and an organic light-emitting device using the same. The hetero-cyclic compound is represented by chemical formula 1. The hetero-cyclic compound of the present invention can be used as an organic matter layer material of the organic light-emitting device.COPYRIGHT KIPO 2016
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Paragraph 0167; 0168; 0172; 0173
(2016/12/01)
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- HETERO-CYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
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The present invention provides: a heterocyclic compound which can significantly improve lifespan, efficiency, electrochemical stability, and thermal stability of an organic light emitting device; and an organic light emitting device containing the heterocyclic compound in an organic compound layer. The heterocyclic compound is represented by chemical formula 1.COPYRIGHT KIPO 2016
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- POLYCYCLIC COMPOUND INCLUDING PYRAZOLE AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
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The present invention refers to pyrazole containing an alkali-soluble polymer resin compound including multi annular ring relates to organic light emitting device.
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- NEW ORGANIC ELECTROLUMINESCENT COMPOUNDS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
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The present invention provides a novel organic electroluminescent compound represented by chemical formula 1 and an organic electroluminescent device including the same. The organic electroluminescent compound is a green phosphorescent host material, can be applied to the organic electroluminescent device, and can improve the luminous efficiency of the organic electroluminescent device and the lifetime of the device.
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- Condensed compound and organic light emitting diode comprising the same
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Provided are a condensed compound represented by chemical formula 1 and an organic light emitting diode comprising the same. X, Y_1, Y_2, A, B, and R_1-R_5 in the chemical formula 1 are explained in the specification. The organic light emitting diode comprising the condensed compound has low driving voltage, high light emitting efficiency, and long durability.COPYRIGHT KIPO 2015
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Paragraph 0377-0379
(2016/10/10)
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- Condensed cyclic compound and organic light-emitting device including the same
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A condensed cyclic compound represented by Formula 1, wherein, in Formula 1, L1, E1, R1, X11 to X13, X21 to X26, a1, b1 and c1 are described in the specification. An organic light-emiiting device including such a compound is also disclosed.
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Paragraph 0198
(2015/07/22)
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- CONDENSED CYCLIC COMPOUND, AND ORGANIC LIGHT EMITTING DEVICE INCLUDING THE SAME
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Disclosed are a condensed ring compound and an organic light emitting device comprising the condensed ring compound. The organic light emitting device comprises: a first electrode; a second electrode facing the first electrode; and an organic layer interposed between the first electrode and the second electrode, wherein the organic layer comprises the condensed ring compound.COPYRIGHT KIPO 2015
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Paragraph 1642-1645
(2016/10/08)
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- Condensed cyclic compound and organic light emitting device including the same
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Disclosed are a condensed ring compound and an organic light emitting device comprising the condensed ring compound. According to one aspect of the present invention, the organic light emitting device comprises: a first electrode; a second electrode; and an organic layer interposed between the first electrode and the second electrode, including a light emitting layer, and containing at least one condensed ring compound.COPYRIGHT KIPO 2015
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Paragraph 0539-0541
(2016/10/08)
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- Composition and organic optoelectric device and display device
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Disclosed are a composition including a first host compound including moieties represented by the Chemical Formulae 1 to 3 that are sequentially bonded with each other and a second host compound including at least one carbazole group with a substituent having hole characteristics, and an organic optoelectric device and a display device to which the composition is applied. In the Chemical Formulae 1 to 3, X1, X2, R1 to R4 and L are the same as described in the detailed description.
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Page/Page column
(2015/01/18)
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- POLYCYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
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The present invention relates to a novel polycyclic compound and an organic light-emitting element using the same. In addition, the present invention an organic light-emitting element comprising: a positive electrode; a negative electrode; and one or more organic material layers provided between the positive electrode and the negative electrode.COPYRIGHT KIPO 2016
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Paragraph 0342; 0343; 0346; 0347
(2016/10/17)
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- Condensed polycyclic compound, an organic electroluminescence element material, and an organic electroluminescence element using the same
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PROBLEM TO BE SOLVED: To provide an organic EL(electroluminescent) element of high luminescent efficiency and long service life, and a condensed polycyclic compound for attaining the same. SOLUTION: The condensed polycyclic compound A represented by the figure, and the organic EL element using the same, are provided. COPYRIGHT: (C)2012,JPOandINPIT
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Paragraph 0113-0114
(2020/11/14)
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- NITROGENATED AROMATIC HETEROCYCLIC DERIVATIVE, AND ORGANIC ELECTROLUMINESCENT ELEMENT USING SAME
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A nitrogen-containing aromatic heterocyclic derivative in which a nitrogen atom of an indenocarbazole skeleton optionally having a hetero atom or an indenoindole skeleton optionally having a hetero atom is bonded to a dibenzofuran or a dibenzothiophene directly or indirectly. The derivative realizes an organic EL device with a high emission efficiency and a long lifetime.
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Paragraph 0167
(2014/06/24)
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- MATERIAL FOR USE IN PHOSPHORESCENT DEVICE AND ORGANIC ELECTROLUMINESCENT DEVICE USING SAME
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Provided is an organic electroluminescent device (organic EL device), in which the luminous efficiency of the device is improved, driving stability is sufficiently ensured, and the construction of the device is simple. This organic EL device is an organic electroluminescent device, including a light-emitting layer between an anode and a cathode laminated on a substrate, in which the light-emitting layer contains a phosphorescent light-emitting dopant and an indolocarbazole compound as a host material. Examples of the indolocarbazole compound include a compound represented by the following formula (1). It should be noted that in the formulae: a ring A and a ring B are represented by the formulae (1a) and (1b), respectively; Ar's each represent an aromatic hydrocarbon group or an aromatic heterocyclic group; R's each represent a hydrogen atom, an alkyl group, or a cycloalkyl group; X represents a methine group or a nitrogen atom; A represents an aromatic hydrocarbon group, an alkyl group, a cycloalkyl group, or a group represented by the formula (1c); and n represents 0 or 1.
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- COMPOUND FOR ORGANIC ELECTROLUMINESCENT DEVICE AND ORGANIC ELECTROLUMINESCENT DEVICE
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Disclosed are an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and of simple constitution and a compound useful for the fabrication of said organic EL device. The compound for the organic EL device has an indolocarbazole structure or a structure similar thereto in the molecule wherein an aromatic group is bonded to the nitrogen atom in the indolocarbazole. The organic EL device has a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and said light-emitting layer comprises a phosphorescent dopant and the aforementioned compound for an organic electroluminescent device as a host material.
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Page/Page column 20
(2010/04/24)
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- COMPOUND FOR ORGANIC ELECTROLUMINESCENT DEVICE AND ORGANIC ELECTROLUMINESCENT DEVICE
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Provided is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, fully secured of driving stability, and simply constructed. The EL device has a light-emitting layer disposed between an anode and a cathode stacked one upon another on a substrate and the light-emitting layer comprises a phosphorescent dopant and an indolocarbazole derivative as a host material. Examples of the indolocarbazole compounds include a compound represented by the following formula (2) or (3), wherein X is N or CH, at least one of Xs is N, and Ar1 to Ar3 each is a substituted or unsubstituted aromatic group.
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Page/Page column 24
(2009/08/14)
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- COMPOUND FOR ORGANIC ELECTROLUMINESCENT ELEMENT AND ORGANIC ELECTROLUMINESCENT ELEMENT
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Disclosed are an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and simple in constitution and a compound for use therein. The organic electroluminescent device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and a compound for use in an organic electroluminescent device having two or more indolocarbazole skeletons as a host material. An example of the compound having indolocarbazole skeletons for use in the device is expressed by the following formula.
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Page/Page column 33-34; 36
(2008/12/07)
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