Organic electroluminescent material and organic light-emitting device thereof
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A technology of electroluminescent materials and organic light-emitting devices, which is applied in the direction of luminescent materials, electric solid devices, electrical components, etc., can solve the problems of low luminous efficiency and low lifespan, and achieve high luminous efficiency, low driving voltage, and increased volume. Effect
Inactive Publication Date: 2018-06-29
CHANGCHUN HYPERIONS TECH CO LTD
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For commonly used anthracene-based fluorescent blue light materials, the luminous effici
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[0036] The preparation method of a kind of organic electroluminescent material described in the present invention, comprises that shown raw material generates a kind of organic electroluminescent material shown in formula I by following route reaction:
[0037]
[0038] 1,6-dibromo The target product is generated by suzuki or buchward reaction.
[0039] Among them, R 1 , R 2 independently selected from hydrogen, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C6-C30 arylamine, substituted or unsubstituted C3-C30 heteroaryl, substituted or unsubstituted C18-C30 triphenyl One of silyl, substituted or unsubstituted C12-C30 diphenylphosphine, substituted or unsubstituted C6-C30 phenylsulfone, R 1 , R 2 Not simultaneously hydrogen.
[0040] The present invention also provides an organic light emitting device, and the organic light emitting device may be an organic light emitting device well known to those skilled in the art. The organic light-emitti...
Embodiment 1
[0041] Embodiment 1: the preparation of compound 1
[0042]
[0043] 6-bromo Add 100mmol to a mixed solvent of toluene, ethanol, and water, add 1 equivalent of 9-anthraceneboronic acid, 3 equivalents of sodium carbonate, and 0.01 equivalent of tetrakistriphenylphosphine palladium under nitrogen protection, and react for 5 hours at reflux temperature. After the reaction is completed Pass through a silica gel column to obtain product 185mmol.
Embodiment 2
[0044] Embodiment 2: the preparation of compound 4
[0045]
[0046] In the reaction vessel, add 4-1 100mmol; 6-bromo 100mmol, potassium tert-butoxide 300mmol, Pd 2 (dba) 3 1mmol, ultrasonically deoxygenated xylene, stirred and dissolved, replaced the air three times, added 4% (4mmol, 50% m / V) of the ligand tri-tert-butylphosphine, replaced the air three times again, and refluxed for 6h. Cool to room temperature, add enough dichloromethane to completely dissolve the product, pass through a small amount of silica gel funnel, and remove catalyst and salt. The filtrate was concentrated to a viscous state and subjected to column chromatography to obtain 80 mmol of product 4.
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Abstract
The invention provides an organic electroluminescent material and an organic light-emitting device thereof, and belongs to the technical field of organic photoelectric materials. A structure of the organic electroluminescent material, provided by the invention, contains a chrysene structure, wherein chrysene, anthracene, phenanthrene and fluorene are common main structures. The organic electroluminescent material has a high triplet energy level, but the organic electroluminescent material is easy to crystallize. The organic electroluminescent material increases molecular volume by linking other aryl or heteroaryl groups, and effectively avoids crystallization. In addition, by linking the sulfone, phosphine oxide, silicon and other groups in a molecule, a conjugated structure is effectivelyinterrupted, the triplet energy level is higher, and an energy barrier between HOMO and LOMO is larger, so that the organic electroluminescent material is more favorable for being used as a blue light-emitting material; in addition, attachment of groups such as sulfone or phosphine oxide facilitates electron transport and balances carrier transport. Drive voltage is reduced. Compared with the prior art, the organic electroluminescent material is applied to the organic light-emitting device, particularly to be used as the blue light-emitting material in a light-emitting layer, has relatively high luminous efficiency and a low driving voltage.
Description
technical field [0001] The invention relates to the technical field of organic photoelectric materials, in particular to an organic electroluminescence material and an organic light emitting device thereof. Background technique [0002] Organic electroluminescence refers to the phenomenon that organic materials are excited by electric current and electric field to emit light under the action of electric field. Organic light-emitting diodes (OLEDs) are a next-generation display technology that utilizes this phenomenon to realize displays. Since Tang C.W. and Vanslyke S.A. of American Kodak Company produced the first organic electroluminescent device with excellent performance in 1987, organic electroluminescent displays have attracted great interest due to their advantages. [0003] At present, due to their excellent performance, red and green light-emitting materials have been used commercially, while the wide energy gap and high thermal stability of blue-light materials ar...
Claims
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