211685-96-0Relevant academic research and scientific papers
Carbazole compound, light-emitting element, light-emitting device, electronic device, and lighting device
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Page/Page column 56, (2015/05/26)
A novel carbazole compound is provided which can be used as a host material for a light-emitting substance (substance emitting fluorescence or substance emitting phosphorescence). A light-emitting element with high emission efficiency, and a light-emittin
N-PHENYL TRISCARBAZOLE
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Page/Page column 23, (2012/03/26)
The present invention relates to a novel triscarbazole compound having substituent on N-phenyl, which can be represented by Formula (I). wherein R1 is selected from the group consisting of hydrogen, halogen or alkyl or alkoxy group having 1 to 20 carbon atoms wherein at least one hydrogen atom is optionally replaced by halogen; RA, RB, RC, RD and RE are any of substituents other than hydrogen wherein at least two of R1 and RA may further form a fused ring; and i, j, k, l and m are same or different at each occurrence and represent an integer from 0 to 4, with the proviso that when R1 is hydrogen, i is not 0. By introduction of the substituent on N-phenyl, the device efficiency, stability and lifetime can be increased while maintaining the solubility. These compounds can be used in various organic devices such as organic light emitting diodes, photovoltaic cells or organic semiconductor devices.
N-phenyl triscarbazole
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Page/Page column 17, (2012/04/10)
The present invention relates to a novel triscarbazole compound having substituent on N-phenyl, which can be represented by Formula (I). wherein R1 is selected from the group consisting of halogen or alkyl or alkoxy group having 1 to 20 carbon atoms wherein one or more hydrogen atom may be replaced by halogen; RA, RB, Rc, RD and RE are any of substituents; and i, j, k, l and m are same or different at each occurrence and represent an integer from 0 to 4. By introduction of the substituent on N-phenyl, the device efficiency, stability and lifetime can be increased while maintaining the solubility. These compounds can be used in various organic devices such as organic light emitting diodes, photovoltaic cells or organic semiconductor devices.
High-triplet-energy tri-carbazole derivatives as host materials for efficient solution-processed blue phosphorescent devices
Jiang, Wei,Duan, Lian,Qiao, Juan,Dong, Guifang,Zhang, Deqiang,Wang, Liduo,Qiu, Yong
, p. 4918 - 4926 (2011/10/12)
A novel series of solution-processible carbazole-based host materials, 3,6-bis(N-carbazolyl)-N-phenylcarbazole (BCC-36), 3,6-bis(3,6-di-tert-butyl-9- carbazolyl)-N-phenylcarbazole (BTCC-36), 2,7-bis(N-carbazolyl)-N-phenylcarbazole (BCC-27), and 2,7-bis(3,6-di-tert-butyl-9-carbazolyl)-N-phenylcarbazole (BTCC-27), is designed and synthesized. Owing to the highly twisted configuration, these hosts exhibit high triplet energy levels (2.90-3.02 eV) and high glass transition temperatures (147-210°C). They also exhibit appropriate HOMO energy levels (-5.21 - 5.36 eV), resulting in an improved hole-injection property. These novel compounds are employed to fabricate phosphorescent organic lighting-emitting diodes (OLEDs) as the host materials doped with the guests of iridium(iii) bis(4,6-difluorophenylpyridinato)- picolinate (FIrpic) and iridium(iii) bis(4′,6′- difluorophenylpyridinato)tetrakis(1-pyrazolyl)borate (FIr6) by spin coating. The best device performance of FIrpic based blue-emitting devices has a rather low turn-on voltage of 3.9 V, a maximum efficiency of 27.2 cd A-1 (11.8 lm W-1), and a maximum external quantum efficiency of 14.0%. Moreover, the best device performance of FIr6 based deep-blue-emitting devices exhibits a turn-on voltage of 4.9 V, a maximum efficiency of 11.5 cd A -1 (4.9 lm W-1), and a maximum external quantum efficiency 6.8%. The performance data are outstanding for solution-processed blue phosphorescent OLEDs. The Royal Society of Chemistry 2011.
Dendritic structure having a potential gradient: New synthesis and properties of carbazole dendrimers
Albrecht, Ken,Yamamoto, Kimihisa
supporting information; experimental part, p. 2244 - 2251 (2009/07/30)
A new synthetic route for carbazole dendrimers was discovered using the copper-catalyzed N-arylation reaction. This synthetic route allowed synthesizing the fourth generation carbazole dendrimer and several derivatives for the first time. The crystal structure, Mark-Houwink-Sakurada plots, and UV-vis and fluorescence studies showed that the dendritic carbazole backbone has a rigid and highly twisted structure. From the measurement of the redox potential of the ferrocene derivatives, the IR spectra of the benzophenone derivatives, and complexation behavior of the phenylazomethine derivatives, the inductive electron-withdrawing effect of the carbazole dendron was revealed. This suggested that the summation of this electron withdrawal from each layer may produce a potential gradient such that the outer layer is electron-rich and the inner layer is electron-poor in the carbazole dendron. By assignment of the 1H and 13C NMR spectra of the dendron, the existence of this kind ofpotential gradient was proved. Overall, these data show the ?-polari zation substituent effect of the carbazole unit, and their summation determines the potential gradient in the repeating dendritic structure of the carbazole dendrimer.
Carbazole derivative, organic semiconductor element, light emitting element, and electronic device
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Page/Page column 18, (2008/06/13)
The problem of the present invention is to provide a carbazole derivative which has an excellent heat resistance and can be formed into a film without crystallization. Also, a problem is to produce an organic semiconductor element, a light emitting element and an electronic device by employing the carbazole derivative. For the purpose, a novel carbazole derivative represented by following general formula (1) is provided: (in the formula, I represents a core carbazole (G0) illustrated by general formula (2), Z represents an internally branched carbazole (G1 to Gn-1) illustrated by general formula (3), E represents an end carbazole (Gn) illustrated by general formula (4), n represents an integer showing generation number of dendrimer, X1 represents hydrogen, halogen, a cynano group, an alkyl group, an aryl group, a heterocyclic residue or the like, X2 and X3 in (G(n-m)-1) (provided, n-m≧1) make a covalent bond with X4 in (G(n-m)), and each of R1 to R8 represents independently hydrogen, halogen, a cynano group, an alkyl group, a dialkylamino group, a diarylamino group, a heterocyclic residue or the like).
