- Pyrene blue fluorescent dopant substance and organic electroluminescent device containing pyrene blue fluorescent dopant substance (by machine translation)
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The invention discloses a pyrene blue fluorescent dopant and an organic electroluminescent device containing the same, wherein the structural formula of the compound is as shown in the formula I. The compound can be used as an organic electroluminescent m
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Paragraph 0115-0119
(2020/11/10)
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- A new series of short axially symmetrically and asymmetrically 1,3,6,8-tetrasubstituted pyrenes with two types of substituents: Syntheses, structures, photophysical properties and electroluminescence
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A new series of short axially symmetrically (4a and 4b) and asymmetrically (4c and 4d) 1,3,6,8-tetrasubstituted pyrene-based compounds with two phenyl moieties and two diphenylamine units on the pyrene core were designed and synthesized based on stepwise synthetic strategy. These compounds were structurally characterized and their photoelectric properties were investigated by spectroscopy, electrochemical and theoretical studies. The structures of 4a and 4b were determined by single-crystal X-ray diffraction analysis, indicating that the compounds are twisted by the peripheral substituents and the intermolecular π-π interactions have been efficiently interrupted. The four compounds exhibit high absolute fluorescence quantum yields (ФF) in dichloromethane (83.31–88.45%) and moderate ФFs in film states (20.78–38.68%). In addition, compounds 4a and 4b display relatively higher absolute ФFs than those of 4c and 4d in film states. All the compounds exhibit high thermal stability with decomposition temperatures above 358?°C and the values of 4c and 4d are higher than 4a and 4b. Compounds 4a and 4b can form morphologically stable amorphous thin films with Tg values of 146?°C and 149?°C, respectively. However, there are no obvious Tg observed in compounds 4c and 4d. Electroluminescent devices using 4a and 4b as doped emission layer show promising device performance with low turn-on voltage (3.0?V), maximum brightness around 15100?cd/m2 and 16100?cd/m2, maximum luminance efficiency of 12.4?cd/A and 13.6?cd/A and maximum external quantum efficiency of 5.34% and 5.63%, respectively.
- Zhang, Ran,Zhang, Tengfei,Xu, Lu,Han, Fangfang,Zhao, Yun,Ni, Zhonghai
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p. 237 - 246
(2016/08/04)
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- Pyrene derivatives comprising heteroaryl amine group and organic light-emitting diode including the same
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The present invention relates to a pyrene derivative represented by chemical formula A, and an organic light-emitting diode including the same. In the chemical formula A, substituents Z, Ar_1, Ar_2, R_1 to R_5, connecting groups L_1 and L_2, and X, m, p and q are the same as defined in a detailed description of the present invention.COPYRIGHT KIPO 2015
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Paragraph 0483-0488
(2016/10/10)
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- Organic light emitting material and organic light emitting device using the same
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Disclosed is an organic light emitting material having the following chemical formula, for improving luminous efficiency, where R1, R2, R3 and R4 denote materials selected from an aromatic group with 6-24 carbon atoms (C6-C24), the group being independently substituted or unsubstituted, preferably, an aromatic group with 6-24 carbon atoms (C6-C24), the group consisting of trimethylsilane (TMS), CN, halogen (F, Cl, Br) alkyl groups with 1-4 carbon atoms (C1-C4).
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- AROMATIC AMINE DERIVATIVE AND ORGANIC ELECTROLUMINESCENT DEVICE USING SAME
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Disclosed is a novel aromatic amine derivative having a specific structure. Also disclosed is an organic electroluminescent device wherein an organic thin film composed of one or more layers including at least a light-emitting layer is interposed between
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Page/Page column 25-26
(2008/06/13)
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