- Electron donor compound and preparation method thereof, light emitting device and display device
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The invention relates to an electron donor compound, a light-emitting device, a preparation method of the light-emitting device and a display device. The electron donor compound has the following structural groups: each R1 independently selected from hydrogen, a trimethylsilyl group, a cyclohexyl group, a 3-pentyl group, a 4-(9,9'-spirobifluorene) group, a 2-(9,9'-diphenyl fluorene) group or a tetraphenyl vinyl group, wherein each R1 is not hydrogen at the same time. When the electron donor compound provided by the invention is used as an electron donor material to be applied to an interface heterojunction exciplex system, the original contact point of an electron donor and an electron acceptor is isolated by a non-hydrogen substituent, so that electrons and holes are separated in space, according to the invention, electrons of the electron acceptor layer can be prevented or hindered from easily moving into the electron donor layer, so that the electrification problem of quantum dots is avoided or relieved, and the efficiency and the service life of the light-emitting device are improved.
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Paragraph 0080; 0134; 0135
(2021/02/06)
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- ORGANIC ELECTROLUMINESCENCE AND ORGANIC ELECTROLUMINESCENCE ELEMENT
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This invention provides an organic electroluminescent compound, which is represented by the following chemical formula (I). In the above formula, A and A' are each independently R0 or R1, and R0 is 9,9'-spirobifluorene-2'-yl, R1 may be selected from substituted or unsubstituted aryl, heteroaryl or heterocyclyl; and at least one of A and A' must be R0. The compound of the formula (I) may be an electron transport material and thereby improve the luminous efficiency and thermal stability of a light emitting element. This invention further provides an organic electroluminescent element made from the organic electroluminescent compound.
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Paragraph 0069; 0070
(2018/05/03)
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- Organic electroluminescence compound and organic electroluminescence element
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The invention provides an organic electroluminescence compound. The organic electroluminescence compound is shown in a chemical formula (I), in the previous formula, A and A' are respectively and independently R0 or R1, R0 is 9, 9'- spirobifluorene-2'-yl, R1 can be selected from substituted or unsubstituted aromatic base, heterocyclic aromatic base or heterocyclic base and the like; at least one of A and A' is R0. The compound in the chemical formula (I) is an electron transport material, so that the luminescence efficiency and the heat stability of an electroluminescence element can be improved. The invention also provides the organic electroluminescence element prepared by the organic electroluminescence compound.
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Paragraph 0090; 0091
(2017/08/31)
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- COMPOSITIONS CONTAINING FLUORENE SUBSTITUTED TRIAZINE DERIVED COMPOUNDS, AND ELECTRONIC DEVICES CONTAINING THE SAME
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The invention provides a composition comprising at least one fluorene substituted triazine derived compound of Formula 1, as described herein, and electronic devices containing the same. Such devices have improved efficiency and better driving voltage.
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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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- Synthesis and photophysical properties of pyrrole/polycyclic aromatic units hybrid fluorophores
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A series of pyrrole/polycyclic aromatic unit hybrid fluorophores was developed by a two-stage synthetic strategy. Their central aryl-substituted pyrrole cores were constructed by a Paal-Knorr pyrrole synthesis reaction. The reaction conditions and mechanism are also discussed in detail. End-capping triflate onto the central pyrrole core enables the core to incorporate various polycyclic aromatic units. The Buchwald-Hartwig amination reaction and the Suzuki-Miyaura cross-coupling reaction were adopted to incorporate the triflate end-capping pyrrole with N-phenylnaphthalen-1-amine and various polycyclic aromatic units to form the hybrid fluorophores. The photophysical properties and thermal properties of the fluorophores were characterized. Most of the pyrrole fluorophores emitted blue light and exhibited high quantum efficiency. The fluorescence properties of these pyrrole fluorophores were induced by manipulating the surrounding polycyclic aromatic units. When the central pyrrole core was incorporated with amino or naphthalene moieties, the fluorescence efficiency and thermal stability of fluorophores 1 and 2 were low (φf g f > 0.99) and stable glassy morphology (the Tg value of the fluorophore 6 was as high as 220 °C). Results of this study demonstrate that the sterically induced fluorescence of crowded pyrrole and the fluorescent polycyclic aromatic units significantly affect the emission properties of the hybrid fluorophores.
- Li, Chang-Shun,Tsai, Ya-Hsuan,Lee, Wei-Chen,Kuo, Wen-Jang
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supporting information; experimental part
p. 4004 - 4013
(2010/08/19)
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