- Planarity of terphenyl rings possessing: O -carborane cages: Turning on intramolecular-charge-transfer-based emission
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To clarify the relationship between planarity and intramolecular charge transfer (ICT), two o-carboranyl compounds (TCB and FCB) containing different ortho-type terphenyl rings, namely, perfectly distorted or planar phenyl rings, were synthesised and fully characterised. Although the emission spectra of both compounds presented intriguing dual-emission patterns in solution at 298 or 77 K and in the film state, distorted TCB mostly showed locally excited emission, whereas planar FCB demonstrated intense emission corresponding to an ICT transition. Interestingly, the emission efficiencies and radiative decay constants of terphenyl-based o-carboranyl compounds were gradually enhanced by increasing the planarity of the terphenyl groups. These results verify the existence of a strong relationship between the planarity of appended aryl groups and ICT-based radiative decay in o-carborane-substituted compounds.
- So, Hyunhee,Kim, Jea Ho,Lee, Ji Hye,Hwang, Hyonseok,An, Duk Keun,Lee, Kang Mun
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supporting information
p. 14518 - 14521
(2019/12/09)
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- Fluorenofluorene-containing compound and organic electroluminescence device thereof
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The invention provides a fluorenofluorene-containing compound and an organic electroluminescence device thereof and relates to the technical field of organic photoelectric materials. A fluorene-fluorene main body is connected with arylamine and a substituted or non-substituted fused imidazole derivative to obtain the fluorenofluorene-containing compound. The compound is a bipolar transmission material, is favorable for compounding holes and electrons in a luminescent layer, has good stability and luminescent efficiency, is simple in synthesis and easy to operate, can be applied to the organicelectroluminescence device to serve as a doping material of the luminescent layer, and can effectively solve the problems of low luminescent efficiency and short service life of a blue luminescent material in the organic electroluminescence device. The organic electroluminescence device provided by the invention has the advantages of high luminescent efficiency and long service life.
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Paragraph 0072; 0075
(2018/10/19)
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- Fluorenofluorene derivative and organic light-emitting device prepared by same
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The invention provides a fluorenofluorene derivative and an organic light-emitting device prepared by the same and relates to the technical field of organic photoelectric materials. The fluorenofluorene derivative and the organic light-emitting device prepared by the same have the advantages that the fluorenofluorene derivative is prepared by connecting a substituted or unsubstituted condensed imidazole derivative to a fluorenofluorene host, the prepared fluorenofluorene derivative has certain electron transport ability, the composition of holes and electrons on a light-emitting layer is benefited, and the fluorenofluorene derivative is good in stability and luminous efficiency, simple to synthesize, easy in synthesizing operation, capable of being used in the organic light-emitting deviceto serve as the light-emitting layer doping material and capable of effectively solving the problems that the blue light-emitting material in the organic light-emitting device is low in luminous efficiency and short in service life; the organic light-emitting device is high in luminous efficiency and long in service life.
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Paragraph 0057; 0058; 0061
(2018/10/19)
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- Fluoreno-fluorene derivative and organic light-emitting device thereof
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The invention provides a fluoreno-fluorene derivative and an organic light-emitting device thereof and relates to the technical field of organic photoelectric materials. The fluoreno-fluorene derivative is obtained through connecting substituted or unsubstituted condensed imidazole and condensed oxazole groups onto a fluoreno-fluorene main body; the fluoreno-fluorene derivative has a certain electron transmission capability; the compounding of holes and electrons on a light-emitting layer is facilitated; the fluoreno-fluorene derivative has good stability and light-emitting efficiency and thesynthesis is simple and easy to operate; the fluoreno-fluorene derivative can be applied to the organic light-emitting device and is used as a light-emitting layer doping material; the problems that ablue light-emitting material in the organic light-emitting device has low light-emitting efficiency and short service life can be effectively solved; the organic light-emitting device thereof has theadvantages of high light-emitting efficiency and long service life.
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Paragraph 0063; 0067
(2018/11/22)
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- A containing [...] compound and its organic light-emitting device (by machine translation)
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The present invention provides a containing [...] compound and its organic light-emitting device, relates to organic photoelectric material technical field. The invention through [...] fluorene main body connected with the aromatic amine, substituted or not substituted fused imidazole, fused oxazole derivative to obtain a containing [...] compound, is a dual polarity transmission material, holes and electrons in the luminescent layer is of composite, has good stability and light-emitting efficiency, it is simple and easy to operate, and can be applied to organic light-emitting device as the dopant material in the luminescent layer, the organic light-emitting device can effectively solve the blue light-emitting material in the light emitting efficiency is low, the problem of short service life, its organic light emitting device having high luminous efficiency, long service life. (by machine translation)
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Paragraph 0076; 0077; 0080
(2018/11/27)
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- A and wu compound and its organic electroluminescent device (by machine translation)
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The present invention provides a and wu compound and its organic electroluminescent light emitting device, which belongs to the technical field of organic photoelectric material. The compounds have the formula (I) as shown in the structure, in the invention of larger and fluorene compound has the structure of the conjugated plane, thus can provide high electronic mobility; introducing electron deficient group purine structure, is more beneficial to accept electronic, make it have good transmission performance; the introduction of bridge connecting structure, on the one hand can increase the molecular weight of the compounds, the resulting material has a high glass transition temperature and can prevent crystallization of the effect, on the other hand such that the three-dimensional structure of the compounds in the space have a certain distortion of the, improve membranaceous forming. The compound as the main material in the luminescent layer is made of the use of the organic electroluminescent device, demonstrate the low driving voltage, advantages of high luminous efficiency, excellent performance of the organic light-emitting material. (by machine translation)
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Paragraph 0074; 0075; 0076
(2018/10/19)
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- A and wu compound and its organic electroluminescent device (by machine translation)
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The present invention provides a and wu compound and its organic electroluminescent light emitting device, which belongs to the technical field of organic photoelectric material. The compounds have the formula (I) as shown in the structure, in the invention of larger and fluorene compound has the structure of the conjugated plane, thus can provide high electronic mobility; introducing electron deficient group indoles, azaindoles structure, is more beneficial to accept electronic, make it have good transmission performance; the introduction of bridge connecting structure, on the one hand can increase the molecular weight of the compounds, the resulting material has a high glass transition temperature and can prevent crystallization of the, on the other hand such that the three-dimensional structure of the compounds in the space on the distorted, improve membranaceous forming. The compound as the main material in the luminescent layer is made of the use of the organic electroluminescent device, demonstrate the low driving voltage, advantages of high luminous efficiency, excellent performance of the organic light-emitting material. (by machine translation)
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Paragraph 0077-0081
(2018/10/19)
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- Polyfluorene derivative and organic light-emitting device thereof
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The invention provides a polyfluorene derivative and an organic light-emitting device thereof, and belongs to the technical field of organic photoelectric materials. The derivative has a structure shown as a formula (I). The polyfluorene derivative disclosed by the invention has a larger conjugate plane structure, so that high electron fluidity can be provided; electron-deficient group dibenzofuran, dibenzothiophene, acridine, phenoxazine and phenothiazine structures are introduced to better facilitate the acception of electrons and enable the polyfluorene derivative to have good transmissionperformance; by introducing a bridged structure, on the one hand, the molecular weight of the compound can be enlarged, and the obtained material is enabled to have high glass transition temperature and prevent the crystallization effect; on the other hand, the derivatives are enabled to have certain distortion in three-dimensional stereoscopic structure, and the film-forming property of the derivative is improved. The organic light-emitting device, which is prepared by using the compound as a main body material in a luminescent layer, shows the advantages of low driving voltage and high luminous efficiency; the polyfluorene derivative is an organic luminescent material with excellent performance.
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Paragraph 0085-0089
(2018/10/19)
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- Difluorene compound and organic electroluminescence device containing same
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The invention provides a difluorene compound and an organic electroluminescence device containing the same, and belongs to the technical field of organic optoelectronic materials. The compound is of the structure as shown in the formula (I), and the difluorene compound has a larger conjugate plane structure, so that the electron mobility is high; electron-deficient groups of pyridine, pyrimidine and triazine structures are introduced, which is more beneficial to electron accepting, thus the difluorene compound has good transmission performance; a bridged linkage structure is introduced, on onehand, the molecular weight of the compound can be increased to make a obtained material has high glass-transition temperature and prevent the crystallization effect, and on the other hand, the type of derivatives have certain distortion on the spatial three-dimensional structures to improve the film-forming property of the derivatives. The organic electroluminescence device prepared by using thecompound as a main body material of a luminescence layer has the advantages of being low in driving voltage and high in luminescence efficiency and is an organic luminescence material with excellent performance.
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Paragraph 0079-0083
(2018/11/22)
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- Difluorene derivative and organic electroluminescence device containing same
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The invention provides a difluorene derivative and an organic electroluminescence device containing the same, and belongs to the technical field of organic optoelectronic materials. The compound is ofthe structure as shown in the formula (I), and the difluorene derivative has a larger conjugate plane structure, so that the electron mobility is high; electron-deficient groups of quinoline and quinazoline structures are introduced, which is more beneficial to electron accepting, thus the difluorene derivative has good transmission performance; a bridged linkage structure is introduced, on one hand, the molecular weight of the compound can be increased to make a obtained material has high glass-transition temperature and prevent the crystallization effect, and on the other hand, the type ofderivatives have certain distortion on the spatial three-dimensional structures to improve the film-forming property of the derivatives. The organic electroluminescence device prepared by using the compound as a main body material of a luminescence layer has the advantages of being low in driving voltage and high in luminescence efficiency and is an organic luminescence material with excellent performance.
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Paragraph 0075-0079
(2018/11/22)
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- Molecular packing and morphological stability of dihydro-indeno[1,2-: B] fluorenes in the context of their substitution pattern
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The synthesis of a series of dihydroindeno[1,2-b]fluorene (IF) derivatives with various side chain substituents is reported, these have been investigated by single-crystal X-ray analysis in terms of their molecular packings and the thermal stability of these morphologies observed by DSC measurements. It is shown that symmetrically substituted IFs bearing longer linear aliphatic side chains tend to crystallize in thermolabile coplanar layers, in which the aliphatic and dihydroindeno[1,2-b]fluorene core segments are spatially segregated. In contrast to that, the attachment of aryl side chains to the dihydroindenofluorene core results in a stabilization of the cofacial morphology, which can be observed by the absence of thermal phase transitions. In addition to this, asymmetrically substituted derivatives, so called "mixed indenofluorenes" (MIFs), bearing pairwise linear aliphatic side chains of variable length, as well as aryl substituents have been synthesized. These derivatives tend to exhibit thermostable morphologies with an enhanced tendency to form edge-to-face contacts of the dihydroindenofluorene structures.
- Hempe,Reggelin
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p. 47183 - 47189
(2017/10/19)
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- Nitrogenous heterocyclic derivative and organic electroluminescence device making use of the same
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A novel nitrogen-containing heterocyclic compound having a specific structure and an organic electroluminescence device comprising an anode, a cathode and an organic thin film layer which comprises a single layer or a plurality of layers comprising at least a light emitting layer and is disposed between the anode and the cathode, wherein at least one layer in the organic thin film layer comprises the above nitrogen-containing heterocyclic derivative singly or as a component of a mixture. The organic electroluminescence device exhibits a great luminance of emitted light and a great efficiency of light emission even under application of a low voltage.
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Page/Page column 39
(2011/11/30)
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- ELECTROLUMINESCENT COMPOUNDS WITH HIGH EFFICIENCY AND ORGANIC LIGHT-EMITTING DIODE USING THE SAME
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The present invention relates to novel organic electroluminescent compounds and an organic light-emitting diode comprising the same. The organic electroluminescent compounds according to the present invention exhibit high luminous efficiency and excellent life property as a material, so that an OLED device having very good operation life can be prepared therefrom.
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Page/Page column 20
(2011/07/06)
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- Method For Substituting Indenofluorenes
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The invention relates to a process for the preparation of trans-indenofluorene compounds of the formula (Ia) or cis-indenofluorene compounds of the formula (Ib) in a reaction with at least one compound of the formula (IIa) or (IIb) respectively with at least one compound of the R-Hal in the presence of at least one organic base and at least one organic, polar, aprotic solvent.
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Page/Page column 4
(2009/01/24)
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- AROMATIC AMINE DERIVATIVE AND ORGANIC ELECTROLUMINESCENCE DEVICE UTILIZING THE SAME
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Provided is a novel aromatic amine derivative with specified structure. Also provided is an organic electroluminescence device having one or more organic thin-film layers including at least a luminescent layer interposed between a cathod and an anode, in which at least one of the organic thin-film layers contains the above aromatic amine derivative alone or as a component of mixture. As a result, there is provided an organic electroluminescence device that has high emission luminance and high heat resistance, excelling in high-temperature storage ability and has long life, and provided an aromatic amine derivative for realizing the organic electroluminescence device.
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Page/Page column 19; 20
(2008/06/13)
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