- Three new carbazole derivatives with high thermal stability as host for efficient green phosphorescent organic-light emitting diodes
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Three host materials, DCzPh, DCzPy and DCzPm, were developed for phosphorescent organic light emitting devices (PhOLEDs). These three compounds exhibit high triplet energy level (ET > 2.7 eV), suitable glass transition temperatures (Tg > 130 °C), appropriate highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels, and balanced charge-transporting properties. Green PhOLEDs were fabricated by utilizing these three materials as hosts and the efficiencies were satisfactory. Device G3 based on DCzPm exhibited high efficiency with the maximum external quantum efficiency (EQE) of 17.2%, and even at the brightness of 1000 cd m?2, the EQE reached 17.1%, demonstrating its low efficiency roll-off. The above results indicate that these host materials possess great commercial potential in OLED applications.
- Ji, Jun,Li, Pengfei,Tian, Qifeng,Feng, Weiliang,Wu, Changjiang
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Read Online
- Preparation method of N-arylcarbazole-3-boric acid
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The invention discloses a preparation method of N-arylcarbazole-3-boric acid, and belongs to the field of liquid crystal intermediates. The preparation method comprises the following steps: coupling carbazole with aryl halide in the presence of alkali to generate N-arylcarbazole, enabling the N-arylcarbazole to react with a bromination reagent to generate Naryl-3, 6-dibromo carbazole, enabling theNaryl-3, 6-dibromo carbazole to react with borate and butyl lithium by a one-pot method, and carrying out hydrolyzing to obtain N-arylcarbazole-3-boric acid. According to the method, dibromides whichare easy to purify are generated during bromination, monosubstituted products are generated by controlling the using amount of the lithiation reagent and the boric acid ester during lithiation, the method is verified on the scale of dozens of kilograms, and the method has the prospect of industrial methods.
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- Amine-based compound and organic light emitting diode comprising the same
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Disclosed are an amine-based compound and an organic light emitting device including the same. The amine-based compound is represented by chemical formula 1A.
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- Organic compound, and organic electroluminescent device and electronic device using the same
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The present invention relates to an organic compound and an organic electroluminescent device and an electronic device using the same, wherein the organic compound has a structure formed by combining an indole carbazole-based planar conjugated group in a fused manner and a dibenzofuran substituted with an aryl group. The structure has higher hole mobility and higher energy transfer efficiency, and is suitable for being used as a light-emitting host material in an organic electroluminescent device. When the organic compound is used as a light emitting host material in an organic electroluminescent device, the light emitting efficiency and the service life of the device can be effectively improved, and the working voltage is reduced.
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Paragraph 0138-0140; 0141-0143
(2021/11/10)
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- Organic compound based on carbazole derivative structure and application of organic compound in OLED
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The invention discloses an organic compound based on a carbazole derivative structure and an application of the organic compound in an OLED device. The structure of the compound simultaneously contains heteroaryl and a carbazole derivative structure, and has high glass transition temperature and molecular thermal stability. The evaporation temperature of the material is low, and the decompositiontemperature of the material is higher than the evaporation temperature of the material. The material has a low extinction coefficient and a high refractive index in the field of visible light, and caneffectively improve the light extraction efficiency of an OLED device after being applied to the OLED device as a covering layer, thereby improving the light emitting efficiency of the device and reducing the power consumption of the device.
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Paragraph 0069; 0071-0074
(2021/02/10)
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- COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND AN ELECTRONIC DEVICE THEREOF
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An object of the present invention is to provide a compound capable of improving high luminous efficiency, low driving voltage and lifespan of a device, an organic electric element using the same, and an electronic device thereof. The present invention provides the compound represented by any one of chemical formulas 6 to 9. By using the compound according to the present invention, high luminous efficiency and low driving voltage of the device can be achieved, and the lifespan of the device can be greatly improved.
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- Heterocyclic com pounds and organic light-emitting diode including the same
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The present invention relates to a novel heterocyclic compound and an organic electroluminescent device comprising the same. The heterocyclic compound is represented by the following Chemical Formula 1, and the organic electroluminescent device including the heterocyclic compound has excellent driving voltage, luminous efficiency, and lifespan properties. Chemical Formula 1. (by machine translation)
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- An electroluminescen compound and an electroluminescent device comprising the same
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The present invention relates to an organic light-emitting compound represented by chemical formula 1. An organic electroluminescent device comprising the organic light-emitting compound in the present invention has excellent power efficiency, light-emitting efficiency, and long life cycle because the present invention can be operated by a lower driving-voltage in comparison with a device comprising conventional phosphorescent host materials.
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Paragraph 0270; 0287-0291; 0694-0698
(2021/02/02)
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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 represented by [Chemical formula 1]. An organic electroluminescent device comprising the organic light-emitting compound in the present invention has excellent power efficiency, light-emitting efficiency, and long life cycle because the present invention can be operated by a lower driving-voltage in comparison with a device comprising conventional phosphorescent host materials. [Chemical formula 1].
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Paragraph 0380; 0385-0388; 0522; 0527-0530
(2020/09/26)
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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 light emitting compound represented by chemical formula A and an organic light emitting device comprising the same. The substituents Y, R1-R17, m, n, L1, and L2 are same as defined in detailed description of the present invention.
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Paragraph 0354; 0380-0384; 0459; 0470; 0471; 0476
(2020/04/30)
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- Boron-nitrogen heteropolyaromatic ring compound and application thereof
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The invention relates to the technical field of display, in particular to a boron-nitrogen heteropolyaromatic ring compound and application thereof. The boron-nitrogen heteropolyaromatic ring compoundhas a structure as shown in a formula I, the compound is based on interaction between a boron-nitrogen structural unit and a surrounding aromatic ring or heteroaromatic ring. The boron-nitrogen heteropolyaromatic ring compound has higher glass transition temperature, higher and balanced charge mobility and more suitable single-triplet state energy, and when the boron-nitrogen heteropolyaromatic ring compound is used as a light-emitting main body material of an organic light-emitting device, the light-emitting efficiency of the device can be greatly improved, and the working voltage of the device is effectively reduced.
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Paragraph 0100-0104
(2020/08/29)
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- Carbazoles compound and organic light-emitting device thereof
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The invention provides a carbazoles compound and an organic light-emitting device thereof, and relates to the technical field of organic photoelectric materials. The carbazoles compound has a specialfused ring structure by connecting substituted or unsubstituted carbazolyl group on a fulvene structure, and the strong photoelectric performance is endowed to the carbazoles compound by a large conjugate Pai electronic system. Since the carbazoles compound is provided with the special rigid plane fused ring structure, the whole movement of the group can be relatively limited, the glass transitiontemperature of the compound is effectively improved, film formation is facilitated. The preparation method of the carbazoles compound is simple, raw materials are easy to obtain, the carbazoles compound as a main body material is applied to an OLED device, the light-emitting efficiency of the device can be obviously improved, the driving voltage of the device can be effectively reduced, and the carbazoles compound is an OLED material with excellent performance.
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Paragraph 0109-0111
(2019/01/23)
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- An AIE dye based smartphone and LDA integrated portable, intelligent and rapid detection system as trace water indicator and cyanide detector
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Portable, rapid, accurate and on-site detection of analysis target has always been the goal of continuous efforts in the field of analysis. In this work, a novel intelligent and rapid detection system based on an AIE dye (TPA-DCV) was established for portable and on-site detection of trace water in organic solvents and CN? in water by integrating the smartphone and linear discriminant analysis (LDA). The TPA-DCV displayed remarkable solvatochromism effect and showed different fluorescence colors to different water contents of different solvents, with the minimum detection limit of 54 ppm. In addition, TPA-DCV also exhibited specific response to CN?, and showed significant fluorescence changes to different amounts of CN?. With the assist of this detection system, these different fluorescence color signals could be accurately classified in canonical score plot. What's more, the classification and distribution of fluorescence color in canonical score plot showed regular change with the target concentration, which could be used to quantify the trace water and CN?. The rationality and practicability of this detection system were preliminary verified by a large number of real sample analyses. This detection system greatly simplifies the analysis process, which is in the proof of intelligent and rapid detection just using a simple color analysis without any instrument test, which may be a big step forward.
- Chen, Linfeng,Tian, Xike,Li, Yong,Yang, Chao,Lu, Liqiang,Zhou, Zhaoxin,Nie, Yulun
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- Color-tunable thiazole-based iridium(III) complexes: Synthesis, characterization and their OLED applications
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With respect to the commonly used electron-deficient pyridyl group in the benchmark dopant Ir(ppy)3, incorporating the electron-rich thiazolyl group with different chromophores have not been extensively studied. In this paper, some iridium(III) complexes bearing functional ligands with the thiazolyl moiety were synthesized and characterized by1H and13C NMR, UV–Vis absorption and photoluminescence spectroscopy. The emission color of these thiazole-based Ir(III) complexes can be tuned from yellow to red and the best phosphorescent organic light-emitting device exhibited the maximum external quantum efficiency of 11.1%, current efficiency of 35.8 cd/A and power efficiency of 21.9 lm/W.
- Chau, Nga-Yuen,Ho, Po-Yu,Ho, Cheuk-Lam,Ma, Dongge,Wong, Wai-Yeung
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- ORGANIC LIGHT EMITTING DEVICE AND DISPLAY DEVICE HAVING THE SAME
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An organic light emitting device and a display device including the same, the organic light emitting device including a first electrode; a hole controlling layer on the first electrode; an emission layer on the hole controlling layer; an electron controlling layer on the emission layer; and a second electrode on the electron controlling layer, wherein the emission layer includes a hole transport host material, an electron transport host material, a bipolar host material, and at least one dopant material.
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- A process of preparing fluorene-carbazole compoound for hole transfer layer of organic electronic device
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The present invention relates to a preparation method of a fluorene-carbazole compound for hole transfer layer. In the case of manufacturing a novel compound having high thermal stability for hole injection layer or hole transfer layer according to the present invention, formation of powder during sublimation and purification is easy, and a novel material for a hole injection layer or a hole transfer layer, which can overcome a problem of mask clogging caused by flocculation, can be produced at reduced costs with high yield. In the present invention, the preparation method of a fluorene-carbazole compound comprises a step of making a reaction between a compound represented by chemical formula 2 and a compound represented by chemical formula 3. The fluorene-carbazole compound of the present invention is represented by chemical formula 1.COPYRIGHT KIPO 2016
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- Fluorene-carbazole compoound for hole transfer layer and organic electronic device comprising the same
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The present invention relates to a fluorene-carbazole compound for hole transfer layer and an organic electroluminescence device comprising the same. The compound of the present invention has high thermal stability in comparison to the conventional materials, and is easy to be formed into powder during sublimation and purification. Also, the fluorene-carbazole compound can alleviate the problem of mask getting stuck caused by flocculation, and can substantially improve operating voltage, luminance efficiency, and lifespan characteristics of an organic electroluminescence device when used as a material constituting the hole injection layer or hole transfer layer of the organic electroluminescence device. The fluorene-carbazole compound of the present invention is represented by chemical formula 1.COPYRIGHT KIPO 2016
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- Organic light-emitting device
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Provided is an organic light-emitting device, including a first electrode; a second electrode facing the first electrode; an emission layer disposed between the first electrode and the second electrode; a first hole transport layer that is disposed between the emission layer and the first electrode and includes a first compound and a first charge-generation material; a second hole transport layer that is disposed between the emission layer and the first hole transport layer and includes a second compound; a third hole transport layer that is disposed between the emission layer and the second hole transport layer and includes a third compound and a second charge-generation material; and a fourth hole transport layer that is disposed between the emission layer and the third hole transport layer and includes a fourth compound. The first, second, third, and fourth compounds are each represented by Formula 1 or 2:
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- Compound containing anthracene and pyrene and preparing method and application thereof
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The invention provides a compound containing anthracene and pyrene and a preparing method and application thereof. The compound has a structure shown in formula I, wherein R1 and R3 are independently selected from substituted or unsubstituted C1-C60 alkyl groups, substituted or unsubstituted C6-C60 aryl groups, substituted or unsubstituted C10-C60 condensed ring groups or substituted or unsubstituted C5-C60 heterocyclic groups; R2 is selected from hydrogen, substituted or unsubstituted C6-C60 aryl groups, substituted or unsubstituted C5-C60 heterocyclic groups, substituted or unsubstituted C10-C60 condensed ring groups or substituted or unsubstituted C5-C60 arylamine groups; n is 0 or 1. When current density is 20 mA/cm2, the current efficiency of the compound with the structure shown in formula I is as high as 8.9 cd/A, and service life is as long as 8500 h which is much longer than that of existing electroluminescent materials.
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Paragraph 0147-0153
(2017/02/24)
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- Novel organic electroluminescent compounds and organic electroluminescent device using the same
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The present invention relates to a novel organic electroluminescent compound and an organic electroluminescent device using the same and, more specifically, to an organic luminescent compound selected among chemical formula 1 to chemical formula 5. [In chemical formula 1 to chemical formula 5, X and Y are selected among N(Ar_1), O and S, respectively. Ar_1 is able to differentiate from each other, and when Ar_1 is plural, Ar_1 is indicated as Ar_1 or Ar_2. Z_1 to Z_8 are selected among C(Ar_3) and N, respectively. Ar_3 is able to differentiate from each other, and an adjacent Ar_3 is able to form a circle by mutual combination.] The organic electroluminescent compound according to the present invention exhibits excellent luminance efficiency as compared to an existing host material by being used as a host material of an organic electroluminescent material in an OLED device and has excellent durability of materials, thereby being able to manufacture an OLED in which the driving durability of the device is excellent.
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Paragraph 0045; 0046; 0055; 0056; 0107; 0108; 0113; 0114
(2020/03/03)
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- MULTICYCLIC COMPOUND AND ORGANIC ELECTRONIC DEVICE USING THE SAME
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The present invention relates to a polycyclic compound and an organic electroluminescent device using the same. The compound is represented by chemical formula 1. In addition, the compound according to the present invention can be used as an organic layer material of the organic electroluminescent device.COPYRIGHT KIPO 2016
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Paragraph 0244-0245; 0247
(2016/10/10)
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- COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND AN ELECTRONIC DEVICE THEREOF
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The purpose of the present invention is to provide a compound which is capable of having high light-emitting efficiency of an element, having a low driving voltage, and improving durability; an organic electronic element using the same; and an electronic device thereof. The compound is represented by chemical formula 1.(110) Substrate(120) Positive electrode(130) Hole injection layer(140) Hole transport layer(141) Buffer layer(150) Light emitting layer(151) Light-emitting assisting layer(160) Electron transport layer(170) Electron injection layer(180) Negative electrodeCOPYRIGHT KIPO 2016
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Paragraph 0134; 0135; 0136; 0137
(2016/10/07)
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- COMPOSITIONS WITH 2, 3-DISUBSTITUTED INDOLES AS CHARGE TRANSPORT MATERIALS, AND DISPLAY DEVICES FABRICATED THEREFROM
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Provided is a composition comprising a compound selected from Structure 1, as described herein:
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Paragraph 00153
(2016/08/03)
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- Organic electroluminescent device employing organic light emitting compound as light emitting material
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Provided is an organic electroluminescent device that exhibits an efficient host-dopant energy transfer mechanism, and thus, expresses a certain high-efficiency electroluminescent performance, based on improved electron density distribution. The organic electroluminescent device also overcomes low initial efficiency and short operation life property, and secures high-performance electroluminescent performance with high efficiency and long life property for each color.
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- Novel organic electroluminescent compounds and organic electroluminescent device using the same
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The present invention relates to a novel organic light-emitting compound and an organic electroluminescent device including the same. More particularly, the organic light-emitting compound according to the present invention is selected from the following Formulae 1 to 5. [In the above Formulae 1 to 5, X and Y are independently selected from N(Ar1), O and S, Ar1 may be different from each other, when Ar1 is plural, this is represented by Ar1 or Ar2; each of Z1 to Z8 is independently selected from C(Ar3) and N, Ar3 may be different from each other, and adjacent Ar3 may combine together to form a ring.] The organic light-emitting compound according to the present invention is used as a host material in an organic light-emitting material in an OLED device and has better light-emitting efficiency than a common host material and excellent lifetime characteristic. An OLED having good driving lifetime may be manufactured.
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Paragraph 0045; 0046; 0055; 0056; 0107; 0108; 0113; 0114
(2021/05/11)
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- COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND AN ELECTRONIC DEVICE THEREOF
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Provided in the present invention are a novel compound which can improve light emitting efficiency, stability, and life, an organic electronic element using the same, and an electronic device thereof. The organic electronic element is characterized by comprising a first electrode; a second electrode; and an organic substance layer located between the first electrode and the second electrode, wherein the compound is contained in the organic substance layer. The organic electronic element is characterized by having the compound contained in at least one layer among a hole injection layer, a hole transfer layer, an light emitting auxiliary layer, or a light emitting layer of an organic substance layer.(140) Hole transfer layer(141) Buffer layer(150) Light emitting layer(151) Auxiliary light emitting layer(160) Electron transfer layer(170) Electron injection layer(180) Negative electrode(130) Hole injection layer(120) Positive electrode(110) SubstrateCOPYRIGHT KIPO 2015
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Paragraph 0234-0236
(2016/10/08)
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- Aromatic sulfone derivatives and Organic electroluminescent device comprising same
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The present invention relates to an organic material having an aromatic sulfonate derivative shape and an organic electroluminescent device using the same. More specifically, provided is a compound represented by chemical formula 1. The organic electroluminescent device of the present invention can obtain short-wavelength light emitting in high efficiency and has improved lifespan properties.COPYRIGHT KIPO 2016
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Paragraph 0099; 0100; 0101; 0102
(2016/10/27)
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- COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND AN ELECTRONIC DEVICE THEREOF
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The present invention provides a novel compound to improve light emission efficiency and reliability of an element and to extend the lifespan of the element, to an organic electronic element using the same, and to an electronic device thereof. The compound is represented by chemical formula 1, wherein n is a constant in the range of two and four.(110) Substrate(120) Positive electrode(130) Hole injection layer(140) Hole tranfer layer(141) Buffer layer(150) Light emitting layer(151) Light-emitting assisting layer(160) Electron transfer layer(170) Electron injection layer(180) Negative electrodeCOPYRIGHT KIPO 2015
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Paragraph 0149; 0153; 0164; 0167; 0168
(2016/10/10)
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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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- Organic compounds for an organic electroluminescent device and an organic electroluminescent device comprising the same
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The present invention provides an organic compound for a novel organic electroluminescent element selected from the group consisting of chemical formula 1 and an organic electroluminescent element comprising the organic compound.COPYRIGHT KIPO 2016
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- COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND AN ELECTRONIC DEVICE THEREOF
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In the present invention, provided is a compound represented by chemical formula 1. In addition, provided is an organic electric device comprising: a first electrode; a second electrode; and an organic material layer between the first electrode and the second electrode, wherein the organic material layer comprises a compound represented by chemical formula 1. If the compound represented by chemical formula 1 is included in the organic material layer of the organic electric device, driving voltage is reduced and light emitting efficiency, color purity and lifespan can be improved.(110) Substrate(120) Positive electrode(130) Hole injection layer(140) Hole transport layer(141) Buffer layer(150) Light emitting layer(151) Light-emitting assisting layer(160) Electron transport layer(170) Electron injection layer(180) Negative electrodeCOPYRIGHT KIPO 2016
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Paragraph 0106-0107; 0110-0111
(2016/10/07)
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- BIS-CARBAZOLE DERIVATIVE AND ORGANIC ELECTROLUMINESCENT ELEMENT USING SAME
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A biscarbazole derivative represented by formula (1): wherein A1, A2, L1, L2, R1 to R4, and a to d are as defined in the specification, is useful as a material for forming organic EL devices and the organic EL devices including the derivative is capable of driving at a low voltage and has a long lifetime.
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- A NOVEL COMBINATION OF A HOST COMPOUND AND A DOPANT COMPOUND AND AN ORGANIC ELECTROLUMINESCENCE DEVICE COMPRISING THE SAME
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The present invention relates to a specific combination of a dopant compound and a host compound, and an organic electroluminescent device comprising the same. The organic electroluminescent device of the present invention provides the advantages of excellent luminous characteristics with lower driving voltages, compared to devices using conventional luminescent materials.
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Paragraph 140; 141; 142; 143
(2014/01/17)
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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 0163-0164
(2014/06/24)
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- NITROGEN-CONTAINING AROMATIC HETEROCYCLIC DERIVATIVE AND ORGANIC ELECTROLUMINESCENCE DEVICE USING SAME
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A nitrogen-containing aromatic heterocyclic derivative represented by the following formula, wherein X1 to X3 are a single bond, CRaRb, NRc, an oxygen atom or a sulfur atom, and when all of X1 to X3 is a single bond, at least one of Ara, Arb and Arc is an aryl group having 6 to 20 ring carbon atoms substituted with a heteroaryl group, an aryloxy group or a heteroaryloxy group, or a substituted or unsubstituted heteroaryl group having 5 to 20 ring atoms.
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Paragraph 0158
(2013/07/31)
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- Blue fluorescence from the ligand and yellow phosphorescence from the iridium complex: High-efficiency wet-processed white organic light-emitting device
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We synthesized four carbazole modified blue-emitting fluorescent ligands. These ligands coordinated with Ir3+ and four yellow-emitting phosphorescent complexes were obtained. A high-efficiency (current efficiency 20.6 cd/A) yellow electrophosphorescence device was wet-fabricated using the complex as a guest. The ligands can harvest and transfer energy to the complexes and a high efficiency (~18 cd/A) white-light emitting device (CIE 0.31, 0.39) was obtained using the ligand as the blue-fluorescence emitter and the complex as the yellow-phosphorescence emitter. Therefore, the ligand can be a coordinator, an emitter and partly, a host. This is beneficial to device efficiency and saving cost for large-scale manufacturing.
- Yu, Fang-Fang,Fan, He-Liang,Huang, Hai-Fang,Cao, Qian-Yong,Dai, Yan-Feng,Gao, Xi-Cun,Shang, Yu-Zhu,Zhang, Min-Yan,Long, Li,Xu, Hong,Li, Xi-Feng,Wei, Bin
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p. 119 - 122
(2012/07/31)
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- AROMATIC HETEROCYCLIC DERIVATIVE AND ORGANIC ELECTROLUMINESCENCE DEVICE USING THE SAME
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An aromatic heterocyclic derivative represented by the following formula (1), a material for an organic electroluminescence device and an organic electroluminescence device including these:
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Page/Page column 70
(2012/11/08)
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- Bianthracene compounds substituted by aromatic ring and their uses for luminescence materials
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The present invention relates to Aromatic ring substituted dianthracene compounds and pertains to the field of synthesis of organic light-emitting materials. Aromatic ring substituted dianthracene compounds in the formula (I) present high glass transition temperature and solution efficiency, which can be used as effective blue-light emitting host materials.
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Page/Page column 13
(2012/12/14)
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- Blue fluorescence from the ligand and yellow phosphorescence from the iridium complex: High-efficiency wet-processed white organic light-emitting device
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We synthesized four carbazole modified blue-emitting fluorescent ligands. These ligands coordinated with Ir3+ and four yellow-emitting phosphorescent complexes were obtained. A high-efficiency (current efficiency 20.6 cd/A) yellow electrophosphorescence device was wet-fabricated using the complex as a guest. The ligands can harvest and transfer energy to the complexes and a high efficiency (~18 cd/A) white-light emitting device (CIE 0.31, 0.39) was obtained using the ligand as the blue-fluorescence emitter and the complex as the yellow-phosphorescence emitter. Therefore, the ligand can be a coordinator, an emitter and partly,a host. This is beneficial to device efficiency and saving cost for lar ge-scale manufacturing.
- Yu, Fang-Fang,Fan, He-Liang,Huang, Hai-Fang,Cao, Qian-Yong,Dai, Yan-Feng,et al.
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p. 119 - 122
(2012/08/29)
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- AROMATIC AMINE DERIVATIVES AND ORGANIC ELECTROLUMINESCENT ELEMENTS USING SAME
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Provided are an organic EL device material capable of reducing the driving voltage of an organic EL device and increasing the lifetime of the device as compared with a conventional organic EL device material, specifically an aromatic amine derivative represented by N(Ara)(Arb)(Arc), and an organic EL device using the material. [Ara is represented by the formula (II). (In the formula (II): La represents a single bond or an arylene group; R1 to R4 each represent an alkyl group, an aryl group, or the like, and R3's or R4's, or R3 and R4 may be bonded to each other to form a ring; and o represents 0 to 3 and p represents 0 to 4.) Arb is represented by the formula (III). (in the formula (III), X represents NRa, O, or S, and Ra and R5 to R7 each represent an alkyl group, an aryl group, or the like, and R5's, R6's, or R7's adjacent to each other, or R5 and R6 may be bonded to each other to form a ring; n represents 2 to 4 when X represents NRa, and represents 0 to 4 when X represents O or S; and q represents 0 to 3, r and s each independently represent 0 to 4.) Arc represents an aryl group, or is represented by the formula (III).]
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Page/Page column 119
(2012/07/03)
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- AROMATIC AMINE DERIVATIVE, AND ORGANIC ELECTROLUMINESCENT ELEMENT
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Provided are: an aromatic amine derivative including a substituent A and a substituent B each represented by the formula (1) or (2) and having an arylene group bound to a carbazole structure, in which the substituent A and the substituent B include groups different from each other in the position at which the arylene group is bonded to the carbazole structure, and the substituent A and the substituent B are bonded to the same nitrogen atom or different nitrogen atoms in the molecule; an organic electroluminescent device including an organic thin-film layer formed of one or more layers including at least a light emitting layer, the organic thin-film layer being interposed between a cathode and a anode, in which at least one layer of the organic thin-film layer contains the aromatic amine derivative, and the molecules are rarely crystallized, the yield upon production of the organic electroluminescent device is improved, the driving voltage for the organic electroluminescent device is low, and the lifetime of the organic electroluminescent device is long; and an aromatic amine derivative which can realize the organic electroluminescent device. (In the formulae, each substituent is as described in claim 1.)
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Page/Page column 62
(2012/08/14)
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- AROMATIC AMINE DERIVATIVE, AND ORGANIC ELECTROLUMINESCENT ELEMENT COMPRISING SAME
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Provided is an aromatic amine derivative represented by the formula N(ArA) (ArB) (ArC) as an organic EL device material capable of reducing the driving voltage of an organic EL device, and improving its luminous efficiency and device lifetime. ArA represents the formula (II-1) or (II-2). La represents an arylene group or the like, Ara represents an aryl group or the like, and n represents 2 or 3. ArB represents the formula (III). Lb represents a single bond or the like, R1 and R2 each represent an alkyl group or the like, o and p each represent 0 to 3 or the like, X represents an oxygen atom or the like, and R3, R4 and R5 each represent an alkyl group or the like. Arc represents an aryl group, a heteroaryl group, or the formula (II-1), (II-2), or (III).
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Page/Page column 41
(2012/10/18)
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- NOVEL COMPOUND AND ORGANIC ELECTRONIC DEVICE USING SAME
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The present invention relates to a novel compound and an organic light emitting device using the compound, and the compound according to the present invention may largely improve a life span, efficiency, electrochemical stability and thermal stability of the organic light emitting device.
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Page/Page column 42-43
(2011/08/03)
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- AROMATIC AMINE DERIVATIVE AND ORGANIC ELECTROLUMINESCENT ELEMENT
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Provided are a long-lifetime organic electroluminescence device which can be fabricated in an improved yield owing to suppressed crystallization of molecules, and an aromatic amine derivative that realizes the device, i.e. , a novel aromatic amine derivative having a specific structure. Specifically provided are an organic electroluminescence device, including an organic thin film layer formed of one or more layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode, and an aromatic amine derivative for at least one layer of the organic thin film layer, in particular, a hole transporting layer, the derivative having at least one such structure that a substituent in which two or more specific heterocycles are linked to each other, in particular, a substituent in which two or more specific heterocycles are linked through an aryl group is bonded to an amine through an aryl group.
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Page/Page column 27; 37
(2012/01/11)
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- Efficient blue organic light-emitting diode using anthracene-derived emitters based on polycyclic aromatic hydrocarbons
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We have synthesized two light-emitting materials based on polycyclic aromatic hydrocarbons (PAHs) for use in blue organic light-emitting diodes (OLEDs). 9-(Phenanthryl)-10-(3-(9-phenylcarbazole-9-yl)anthracene (PPCA) acts as the host and 9,10-bis-biphenyl-4-yl-2,6-diphenylanthracene (BDA) acts as the dopant. PPCA contains an electron-transporting phenanthrene moiety and a hole-transporting 9-phenyl-9H-carbazole moiety in the anthracene core. BDA contains PAHs without amino substituents in the anthracene core. The optimized device structure, ITO/DNTPD (600 )/α-NPB (300 )/PPCA:BDA 5 wt.% (250 )/N1PP (300 )/LiF (5 )/Al (1000 ), is characterized by blue electroluminescence (EL), with a current efficiency of 6.9 cd/A, power efficiency of 3.23 lm/W, and external quantum efficiency of 5.1% at 10 mA/cm2 and CIE coordinates of (0.15, 0.18).
- Bin, Jong-Kwan,Hong, Jong-In
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scheme or table
p. 802 - 808
(2012/03/26)
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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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Page/Page column 75-76
(2011/09/12)
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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 42
(2010/05/13)
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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 197-198
(2010/04/03)
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