- Compound and organic electroluminescent device
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The invention provides a novel compound, and particularly relates to a compound containing an anthracene structure connected with a heterocyclic structure and application of the compound in an organiclight-emitting device. The novel organic electroluminescent material, namely the compound of the invention is represented by a formula (I) which is described in the specification. The novel compoundprovided by the invention has optimized electron injection and transmission capability, good exciton blocking performance, and remarkable and excellent electron mobility, and shows good film-forming performance when being applied to an organic layer of the organic light-emitting device, so the efficiency and stability of an electron transmission layer can be improved. The device adopting the compound has the advantages of high luminous efficiency, low driving voltage and long service life.
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Paragraph 0064-0067; 0113-0116
(2020/06/09)
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- Bipolar compounds based on 1,3,4-thiadiazole, and preparation method and application thereof
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The invention provides novel bipolar compounds which are formed by using 1,3,4-thiadiazole with strong electron withdrawing ability as a core group and connecting the position 2 and the position 5 of1,3,4-thiadiazole to groups having electron donor/acceptor abilities respectively with arylene groups as Pi bridges. The parent nucleus structure, i.e., 1,3,4-thiadiazole, has symmetrical strong electron withdrawing ability, so the compounds extending via the Pi bridges present ordered closely-packed structures; bipolar benzoheterocycles endow the compounds with certain rigidity, so low optical loss caused by light near a negative pole can be realized, and optical extraction efficiency is improved; so the compounds are an ideal light-emitting layer material. Meanwhile, since the compounds haveparent nucleuses with strong electron withdrawing ability and the donor/acceptor groups, the compounds are allowed to have powerful charge balancing ability; conjugation broken by the Pi bridges effectively improves the problem of band gap reduction caused by intramolecular charge transfer of electron-donating and electron-withdrawing groups and endows a device with lower driving voltage, higherdevice efficiency and lower efficiency drop; so the compounds are also an excellent host material for luminescent layers.
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- A phenanthro imidazole symmetrical derivatives of the main material and electroluminescent device
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The invention relates to a phenanthroimidazole symmetric derivative host material. The structure of the host material is represented by formula I, and can be used to form an organic electroluminescent device with the advantages of high luminescence efficiency, low driving voltage, long life, high brightness and high color purity. In the formula I, R1 and R2 are respectively independently selected from the hydrogen atom, substituted or unsubstituted C1-C30 alkyl groups, C1-C30 cycloalkyl groups, C1-C30 saturated alkyl groups, substituted or unsubstituted C1-C30 alkyloxy groups, substituted or unsubstituted C6-C30 aryl groups, substituted or unsubstituted C6-C30 aryloxy groups, substituted or unsubstituted C6-C30 arylamino groups, substituted or unsubstituted C2-C30 heterocyclic groups, substituted or unsubstituted C6-C30 fused polycyclic groups, hydroxy groups, cyan groups or substituted or unsubstituted amino groups.
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Paragraph 0193-0197
(2019/04/06)
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- QUINAZOLINE DERIVED COMPOUNDS FOR ELECTRONIC FILMS AND DEVICES
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The invention provides a composition comprising at least one compound selected from the group consisting of the following (A, B, C and D): A) wherein R1, R2 and R3 are each described herein; and wherein Formula 1 comprises at least three C-N double bonds; and wherein one or more hydrogens may be optionally substituted with deuterium; B) wherein R1’, R2’, R3’, R4’, R5’ and L are each described herein, and and wherein if R1’ comprises a biphenyl, it does not comprises a carbazole; and wherein one or more hydrogens may be optionally substituted with deuterium; C) wherein R1”, R2”, R3”, R4” and R5” are each described; and wherein if R1’ comprises a biphenyl, it does not comprises a carbazole; and wherein one or more hydrogens may be optionally substituted with deuterium; and D) a combination thereof.
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- Isoquinoline compound and its preparation method, the organic electroluminescent device
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The invention provides isoquinoline compounds and a preparation method thereof, and an organic light emitting diode. The isoquinoline compounds are as shown in a molecular formula (I) in the specification. Compared with the prior art, the isoquinoline compounds provided by the invention are prepared by introducing Q1, Q2, Ar1, Ar2, Ar3 and Ar4 groups into benzo[g]isoquinoline compounds, so electronic density and skills can be improved; meanwhile, R1 can improve performances of the isoquinoline compounds, so the organic light emitting diode containing the isoquinoline compounds as shown in the molecular formula (I) has the characteristics of high brightness, good heat resistance, long service life, high efficiency, etc.
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Paragraph 0160; 0161-0166
(2018/03/24)
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- Synthesis and photophysical properties of new through-space conjugated luminogens constructed by folded tetraphenylethene
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Through-space conjugation refers to a unique non-covalent electronic coupling interaction typically occurring between two face-to-face parallel aromatic units, which has shown great potential in constructing novel functional materials capable of multidimensional carrier and energy transportation. However, well-studied through-space conjugation systems are quite rare. In this work, a series of tailored through-space conjugated luminogens are readily constructed from the folded tetraphenylethene (TPE) core and common functional groups like fluorene, carbazole, imidazole and dimesitylborane. Systematic studies on their photophysical properties were conducted, and a deep insight into the structure-property relationship is gained. The new molecules show aggregation-enhanced emission (AEE) characteristics with high fluorescence quantum efficiencies of up to 54% in films. Through the binding experiments of fluoride ions with boron atoms, the impacts of through-space conjugation on the photophysical properties of the luminogens are carefully studied. All these results undoubtedly provide important clues to the rational design of efficient through-space conjugated materials with specific functions.
- He, Bairong,Luo, Wenwen,Hu, Shimin,Chen, Bin,Zhen, Shijie,Nie, Han,Zhao, Zujin,Tang, Ben Zhong
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p. 12553 - 12560
(2017/12/26)
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- A kind of organic compound and its use this organic compound electroluminescent device
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The invention relates to an organic compound. The organic compound has a structure represented in a formula I, wherein R1, R2 and R3 are independently selected from hydrogen atom, substituted or non-substituted C1-C30 alkyl, substituted or non-substituted C1-C30 naphthenic base, substituted or non-substituted C1-C30 alkoxy, substituted or non-substituted C6-C30 aryl, substituted or non-substituted C6-C30 aryloxy, substituted or non-substituted C6-C30 arylamine, substituted or non-substituted C2-C30 heterocyclic ring, substituted or non-substituted C6-C30 condensed polycyclic group, hydroxyl, cyano group and substituted or non-substituted amino, respectively. Furthermore, the invention relates to an electroluminescent device, wherein the electroluminescent device comprises a hole injection layer and/or a hole transport layer using at least one of the compounds.
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Paragraph 0140-0142;0143
(2016/10/08)
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- An organic electron transport compound
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The invention provides an organic electronic transmission compound having a following structural formula (I) as shown in the specification. The organic electronic transmission compound is better in thermal stability, is high in luminous efficiency and purity, can be used for manufacturing an organic electroluminescence device and is applied to the field of organic solar batteries, organic thin film transistors or organic photoreceptors..
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Paragraph 0065; 0073; 0074
(2016/10/07)
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- A benzimidazole-based electron transport compound
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The invention provides a benzimidazole-based electron transport compound with a structure formula I. The compound has the advantages of relatively good thermal stability, high luminous efficiency and high luminous purity. The compound can be used for manufacturing an organic electroluminescent device and can be applied in the fields of organic solar cells, organic thin-film transistors or organic photoreceptors. The structure formula I is as shown in the specification.
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- Synthesis of Benzimidazoles bearing borionic acid functionality via metal-free aerobic oxidation
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The present invention relates to benzimidazole derivative useful as a natural product, and as an intermediate product for synthesizing a medicine by having a boronic functional group in a molecule, and to a method to synthesize the benzimidazole derivative in an environment friendly way. More particularly, the present invention relates to a method to manufacture benzimidazole derivative having a boronic functional group in a molecule by using an aerobic oxidation cyclization reaction using air as an oxidizing agent under the presence of an alkaline metal halide or alkali earth metal halide catalyst in an anhydrous condition.COPYRIGHT KIPO 2016
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Paragraph 0302-0303; 0364-0366
(2017/02/24)
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- Synthesis of Benzimidazole-Substituted Arylboronic Acids via Aerobic Oxidation of 1,2-Arylenediamines and Formyl-Substituted Aryl MIDA Boronates using Potassium Iodide as a Catalyst
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A highly efficient protocol for the synthesis of benzimidazole-substituted arylboronic acids was developed via aerobic oxidative cyclization of 1,2-aryldiamines and formyl-substituted aryl MIDA (N-methyliminodiacetic acid) boronates using potassium iodide as a nucleophilic catalyst. Furthermore, a one-pot protocol for the synthesis of benzimidazole-substituted arylboronic acids from 1,2-phenylenediamines and formyl-substituted arylboronic acids was developed without the isolation of any intermediates. The resulting boronic acids were further subjected to Suzuki-Miyaura coupling reactions without isolation, leading to diaryl-substituted benzimidazoles with only one separation step.
- Lee, Ye-Sol,Cheon, Cheol-Hong
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p. 2951 - 2956
(2015/09/28)
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- Novel hole transport materials based on N,N′-disubstituted-dihydrophenazine derivatives for electroluminescent diodes
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A series of novel hole transport materials for organic light-emitting diodes (OLEDs) based on 9,14-diphenyl- 9,14-dihydrodibenzo[a,c]phenazine were synthesized and characterized by 1H NMR and 13C NMR, mass spectrometry and single crystal structure analysis methodologies. The crystal structures of three selected molecules reveal large dihedral angles between different functional units. The electro-optical properties of the materials were examined by UV-vis absorption, photoluminescence spectroscopy and cyclic voltammetry. The HOMO of the materials were between 4.83-5.08 eV, indicating a good match between the HOMO of indium tin oxide (ITO) and the HOMO of light-emitting layer, which renders the promising candidates as hole transport materials for organic light-emitting devices. In terms of the device with the structure of ITO/HTM (60 nm)/Alq3 (50 nm)/LiF (1 nm)/Al (200 nm), the device b using N,N-diphenyl-4′ -(14-phenyldibenzo[a,c]phenazin-9(14H)-yl)-[1,1′ -biphenyl]-4-amine presented a maximum luminance of 17 437 cd m-2 at 10.7 V and kept a high current efficiency (the maximum current efficiency is 2.25 cd A-1) at a high current density (>500 mA cm-2), which illustrates the exploited material possesses good hole transport and stable properties.
- Zheng, Zhiwen,Dong, Qingchen,Gou, Liao,Su, Jian-Hua,Huang, Jinhai
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supporting information
p. 9858 - 9865
(2015/02/02)
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- Using a double-doping strategy to prepare a bilayer device architecture for high-efficiency red PhOLEDs
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A simple, bilayered, red phosphorescent organic light-emitting device featuring a doubly-doped emitting layer comprising of the novel hole-transporting host DTAF, the electron-transporting host 27SFBI, and the emitter Os(bpftz)2(PPhMe2)2 covering the interfacial region provides an unusually high current of ca. 1560 mA cm -2 at 8.5 V, a maximum brightness of 32700 cd m-2, external quantum efficiencies as high as 12.3% (10.9% at 1000 cd m -2), and a power efficiency of 13.5 lm W-1. This concise device architecture is very cost-effective and competitive for practical applications.
- Kao, Ming-Tzu,Hung, Wen-Yi,Tsai, Zhen-Han,You, Hong-Wei,Chen, Hsiao-Fan,Chi, Yun,Wong, Ken-Tsung
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scheme or table
p. 1846 - 1851
(2011/10/02)
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