Organic electroluminescence compound containing benzonaphthofuran and luminescent device
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An electroluminescence and compound technology, applied in the field of organic electroluminescence devices, can solve the problems of reduced device efficiency, unbalanced charge in the light-emitting layer, difficult electron flow, etc. Effect
Inactive Publication Date: 2019-01-25
SHANGHIA TAOE CHEM TECH CO LTD
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Problems solved by technology
However, due to the characteristics of CBP that holes are easy to transport and electrons are difficult to flow, the charge in the light-emitting layer is unbalanced, which reduces the efficiency of the device.
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Embodiment 1
[0054] Synthetic route of compound 9
[0055]
[0056] The synthetic method of intermediate 9-1
[0057] In the flask, add bromobenzonaphthofuran (5g, 17mmol), 3-boronic acid-9-phenylcarbazole (5.4g, 18.6mmol), potassium carbonate (5.4g, 40mmol), palladium acetate (0.05 g), X-phos (0.1g), tetrahydrofuran (50mL), and water (20mL), heated to reflux for 10 hours under nitrogen protection, cooled, extracted with dichloromethane, dried, concentrated, and the crude product was purified by column chromatography Obtained 6.6 g, 85% yield.
[0058] The synthetic method of intermediate 9-2
[0059] In the flask, add intermediate 9-1 (6g, 13mmol), dry tetrahydrofuran (70mL), cool to -78°C under nitrogen protection, slowly add 2.5M n-butyllithium n-hexane solution (15.6mmol) , slowly warming up to room temperature and stirring for 2 hours, cooling to -78°C again, slowly adding triisopropyl borate (4g, 15.6mmol), after the addition was complete, slowly warming up to room temperature,...
Embodiment 2
[0063] Synthetic route of compound 20
[0064]
[0065] The synthesis method is the same as that of compound 9, the raw materials used are intermediate 9-2 and bromobenzimidazole, and the yield is 78%.
Embodiment 3
[0067] Synthetic route of compound 24
[0068]
[0069] The synthesis method of intermediate 24-1 is the same as that of intermediate 9-1, the raw material used is 9-phenyl-2-carbazole boronic acid, and the yield is 79%.
[0070] The synthesis method of intermediate 24-2 is the same as that of intermediate 9-2, the raw material used is intermediate 24-1, and the yield is 38%.
[0071] The synthesis method of compound 24 was the same as that of compound 9, and the yield was 73%.
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Abstract
The invention provides an organic electroluminescence compound containing benzonaphthofuran. The organic electroluminescence compound has a structural formula as follows (shown in the description). The organic electroluminescence compound has the advantages that the thermal stability is better, the light emitting efficiency is high, and the light emitting purity is high; the organic electroluminescence compound can be applied into the fields of organic electroluminescence devices, organic solar batteries, organic film transistors or organic photoreceptors. The invention also provides an organic electroluminescence device. The organic electroluminescence device comprises an anode, a cathode and an organic layer, wherein the organic layer comprises at least one of a light emitting layer, a hole injection layer, a hole transmission layer, a cavity blocking layer, an electron injection layer and an electron transmission layer; the organic layer at least comprises one layer of compound shown in a structure formula I. The organic electroluminescence device prepared by the organic electroluminescence compound has the advantages that the electroluminescence efficiency is good, the color purity is excellent, and the service life is long.
Description
technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to an organic electroluminescent compound containing benzonaphthofuran, and also relates to an organic electroluminescent device. Background technique [0002] Organic electroluminescent devices (OLEDs) are devices prepared by depositing a layer of organic materials between two metal electrodes by spin coating or vacuum evaporation. A classic three-layer organic electroluminescent device includes a hole transport layer, emissive layer and electron transport layer. The holes generated by the anode are combined with the electrons generated by the cathode through the hole transport layer to form excitons in the light emitting layer through the hole transport layer, and then emit light. Organic electroluminescent devices can be adjusted to emit various required lights by changing the material of the light-emitting layer as required. [0003] As a new type of display...
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