- Effect of arylamino-carbazole containing hole transport materials on the device performance and lifetime of OLED
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We synthesized four hyper-conjugated aromatic hole transporting materials with different molecular geometry and energy levels by attaching arylamino moiety attached to the carbazole core. A brominated carbazole moiety reacted with an arylamino moiety using a Buchwald-Hartwig reaction. The characteristics of these hole transporting materials were investigated using TGA, DSC, UV–Vis and luminescence spectroscopy. The energy levels of all materials used in this study were estimated from cyclic voltammograms and absorption spectra. The hole transporting properties of the synthesized molecules were measured using single-carrier devices. All four hole transporting materials showed similar hole mobility. The effectiveness of hole transporting materials was compared by fabricating green-emitting organic light emitting diode (OLED) devices. It turned out that the device performances were critically dependent on the relative energy levels of the hole transporting layer and emission layer. However, the molecular geometry greatly influenced the device lifetime, determining thermally induced crystallization by the heat produced during device operation.
- Joung, Kuk Soung,Kim, Kyu Sung,Kim, Seung Uk,Tak, So Hyun,Yu, Jae-Woong
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- Compound, Coating Composition Comprising Same, and Organic Light-Emitting Device
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The present specification relates to a compound, a coating composition including the same, and an organic light emitting device.
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- COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND A ELECTRONIC DEVICE THEREOF
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The present invention relates to a novel compound, an organic electric element using the same, and an electronic device thereof. According to the present invention, a luminous efficiency, a color purity and a lifespan of the element can be improved and a driving voltage can be lowered. The organic electric element comprises: an anode; a cathode; and an organic material layer formed between the anode and the cathode.
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Paragraph 0168; 0172-0175; 0225-0228
(2020/05/30)
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- Novel organic compounds and an organic electroluminescent device comprising the same
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Provided is an organic compound for a capping layer in an organic electroluminescent device, which is selected from a group comprised of elements represented by chemical formula 1. In addition, provided is an organic electroluminescent device comprising the capping layer (CPL) which is made of the organic compound.COPYRIGHT KIPO 2016
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- Organic compounds for forming capping layer of an organic electroluminescent device and an organic electroluminescent device comprising the same
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Provided is an organic compound for forming a capping layer of an organic electroluminescent device selected from a group consisting of chemical formula 1. In addition, provided is the organic electroluminescent device equipped with the capping layer (CPL) made of the organic compound.COPYRIGHT KIPO 2015
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- benzimidazol-2-yl-phenyl compound, light-emitting element, light-emitting device, electronic device, and lighting device
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Objects of the present invention are to provide the following: a novel heterocyclic compound which can be used as a material in which a light-emitting substance of a light-emitting layer in a light-emitting element is dispersed; a novel heterocyclic compound having a high electron-transport property; a light-emitting element having high current efficiency; and a light-emitting device, an electronic device and a lighting device each having reduced power consumption. Provided are a heterocyclic compound represented by General Formula (G1-1) or (G1-2) below, and a light-emitting element, a light-emitting device, an electronic device and a lighting device each including the heterocyclic compound. Such use of the heterocyclic compound represented by General Formula (G1-1) or (G1-2) makes it possible to provide a light-emitting element having high current efficiency, and a light-emitting device, an electronic device and a lighting device each having reduced power consumption.
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- CARBAZOLE DERIVATIVE, LIGHT-EMITTING ELEMENT MATERIAL, LIGHT-EMITTING ELEMENT, AND LIGHT-EMITTING DEVICE
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ABSTRACT An object is to provide a carbazole derivative which has a wide band gap and with which excellent blue color purity is obtained. In addition, another object is to provide highly reliable light-emitting elements, light-emitting devices, lighting devices, and electronic devices in which the carbazole derivative is used. Carbazole derivatives represented by the general formulas (1), (P1), and (M1) are provided. Further, light-emitting elements, light-emitting devices, and electronic devices which are formed using the carbazole derivative represented any of the general formulas (1), (P1), and (M1) are provided.
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Page/Page column 198-200
(2010/04/03)
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- Carbazole Derivative and Method for Producing the Same
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To provide a method for producing a wide variety of carbazole derivatives which have a simple and uncomplicated process and in which variations in the yield, purity, etc. of a desired substance which are caused by an aryl group introduced is reduced as much as possible. A method for producing a carbazole derivative represented by General Formula (1) is provided, in which 9-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazole having an active site at the 3-position of the carbazole skeleton and an aromatic compound having an active site are coupled. In the formula, Ar1 represents an aryl group with 6 to 13 carbon atoms in a ring, and Ar1 may have a substituent.
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Page/Page column 41-42
(2010/04/23)
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- ANTHRACENE DERIVATIVE AND LIGHT-EMITTING DEVICES, ELECTRONIC DEVICES, AND LIGHTING DEVICE USING THE ANTHRACENE DERIVATIVE
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An anthracene derivative is disclosed, and a light-emitting element, a light-emitting device, an electronic device, and a lighting device using the anthracene derivatives are demonstrated. The structure of the anthracene derivative is described in detail in the specification. The use of the anthracene derivative enables the production of a blue emissive light-emitting element having high emission efficiency, excellent purity of emission color, and a long lifetime, which contributes to the production of a high-performance light-emitting device, electronic device, and lighting device.
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Page/Page column 43
(2010/05/13)
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- CARBAZOLE DERIVATIVE, AND LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND ELECTRONIC DEVICE USING CARBAZOLE DERIVATIVE
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To provide a light-emitting element having high luminous efficiency and to provide a light-emitting device and an electronic device which consumes low power and is driven at low voltage, a carbazole derivative represented by the general formula (1) is provided. In the formula, α1, α2, α3, and α4 each represent an arylene group having less than or equal to 13 carbon atoms; Ar1 and Ar2 each represent an aryl group having less than or equal to 13 carbon atoms; R1 represents any of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, and a substituted or unsubstituted biphenyl group; and R2represents any of an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted phenyl group, and a substituted or unsubstituted biphenyl group. In addition, l, m, and n are each independenly 0 or 1.
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Page/Page column 143-144
(2009/07/17)
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- Method of Synthesizing 9-Aryl-10-Iodoanthracene Derivative and Light-Emitting Material
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A method of efficiently synthesizing 9-aryl-10-iodoanthracene from 9-arylanthracene by a simple procedure is provided. By mixing an iodinating agent that is a substance having a structure of an amide group in which nitrogen of the amide group and iodine are directly bonded to each other, an acid, and 9-arylanthracene, iodine is introduced into the 10-position of 9-arylanthracene, whereby 9-aryl-10-iodoanthracene can be synthesized.
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Page/Page column 8
(2009/10/06)
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- Organic compound, anthracene derivative, and light-emitting element, light-emitting device, and electronic device in which the anthracene derivative is used
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An anthracene derivative represented by a general formula (1) and an organic compound represented by a general formula (8) are provided. Further, by use of the anthracene derivative represented by the general formula (1), a light-emitting element with high emission efficiency can be obtained. Furthermore, by use of the anthracene derivative represented by the general formula (1), a light-emitting element that emits blue light with high color purity can be obtained.
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Page/Page column 64
(2008/12/04)
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