Carbazole organic electroluminescent compound and organic light-emitting device thereof
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A compound and luminescent technology, applied in organic chemistry, electrical solid devices, electrical components, etc., can solve the problems of high energy consumption, affecting device efficiency, poor thermal stability, etc., and achieve high luminous purity, high luminous efficiency, good The effect of thermal stability
Inactive Publication Date: 2018-02-02
SHANGHIA TAOE CHEM TECH CO LTD
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Problems solved by technology
Traditional hole injection materials, such as CopperPhthalocyanine (CuPc), are slow to degrade, consume high energy for preparation, are not conducive to environmental protection, and they absorb light, which affects the efficiency of devices
The original hole transport materials such as NPB have poor thermal stability, which also greatly affects the life of the device.
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Embodiment 1
[0061] Synthesis of Compound 10
[0062]
[0063] In a flask, add Intermediate 2-1 (2g, 3.8mmol), 4-dianilinophenylboronic acid (1.2g, 4mmol), potassium carbonate (1.1g, 8mmol), palladium acetate (0.1g), X-phos (0.2g), dioxane (15mL), water (8mL), heated to reflux under nitrogen protection for 12 hours, cooled, extracted with dichloromethane, dried, and the crude product was purified by column chromatography to obtain 1.4g of product, product rate 49%.
[0064] The synthesis of the final compound is the same as that of compound 10, and the raw materials and yields used are shown in Table 3:
[0065] table 3
[0066]
[0067]
[0068]
[0069]
Embodiment 16-30
[0071] Fabrication of Organic Electroluminescent Devices
[0072] Preparation of OLEDs using the compounds of the Examples
[0073] First, the transparent conductive ITO glass substrate 110 (with the anode 120 on it) (China CSG Group Co., Ltd.) is washed with deionized water, ethanol, acetone and deionized water in sequence, and then treated with oxygen plasma for 30 seconds.
[0074] Then, spin-coat PEDOT:PSS (polyethylenedioxythiophene: poly(styrene sulfonate)) with a thickness of 45 nm on the ITO as the hole injection layer 130, and dry at 150° C. for 30 minutes;
[0075] Then, on the hole injection layer, vapor-deposit the compound of the present invention with a thickness of 40 nm as the hole transport material 140,
[0076] Then, a luminescent layer 150 with a thickness of 30 nm is vapor-deposited on the electron blocking layer, wherein CBP is the main luminescent material, and 8% by weight of Ir(ppy) 3 As a phosphorescent doping guest material.
[0077] Then, 40 nm t...
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Abstract
The invention provides a carbazole organic electroluminescent compound, which has a structure shown as the specification. The compound has good thermal stability, high luminous efficiency, high luminous purity and low driving voltage, can be used for making organic light-emitting devices, and cab be applied to organic light-emitting devices, organic solar cells, perovskite cells, organic thin filmtransistors, organic photoreceptors and other fields. The invention also provides an organic light-emitting device, which comprises an anode, a cathode and an organic layer, the organic layer includes at least one of a luminescent layer, a hole injection layer, a hole transport layer, an exciton barrier layer and an electron transport layer, and includes a compound shown as structural formula I.The organic light-emitting device has the advantages of good electroluminescence efficiency, excellent color purity and long lifetime.
Description
technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to a carbazole-based organic electroluminescent material and an organic electroluminescent device, and belongs to the technical field of organic electroluminescent device display. 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 lay...
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