Dicarbazole benzene derivative and application thereof and organic electroluminescent device

A technology of dicarbazole benzene and its derivatives, which is applied in the field of organic electroluminescent devices, can solve problems such as difficult flow of electrons, charge imbalance in the light-emitting layer, and reduced device efficiency, and achieve good thermal stability, high luminous purity, and high The effect of luminous efficiency

Inactive Publication Date: 2018-04-20
SHANGHIA TAOE CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • Dicarbazole benzene derivative and application thereof and organic electroluminescent device
  • Dicarbazole benzene derivative and application thereof and organic electroluminescent device
  • Dicarbazole benzene derivative and application thereof and organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Synthesis of compound 3

[0050]

[0051] Synthesis of Intermediate A

[0052] In a flask, add 3-chloro-4-bromo-iodobenzene (20 g, 63 mmol), 9-phenyl-carbazole-3-boronic acid (36 g, 127 mmol), potassium carbonate (18 g, 130 mmol), tetrahydrofuran (300 mL) , water (150mL), tetrakistriphenylphosphine palladium (1g), heated to reflux under nitrogen protection for 12 hours, cooled, extracted with dichloromethane, dried, concentrated, and the crude product was purified by column chromatography to obtain 31g, the yield was 82%.

[0053] Synthesis of compound 3

[0054] In a flask, add intermediate A (2 g, 3.4 mmol), 4-cyanophenylboronic acid (0.74 g, 5.1 mmol), potassium carbonate (1 g, 7 mmol), dioxane (30 mL), water (15 mL), Palladium acetate (0.1g), X-phos (0.2g), heated to reflux under nitrogen protection for 12 hours, cooled, extracted with dichloromethane, dried, concentrated, and the crude product was purified by column chromatography to obtain 1.2g, the yield wa...

Embodiment 9-16

[0060] Fabrication of Organic Electroluminescent Devices

[0061] Preparation of OLEDs using the compounds of the Examples

[0062] 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.

[0063] Then, 3nm thick MnO was evaporated on the ITO 3 (molybdenum oxide) is the hole injection layer 130 .

[0064] Then, 50 nm thick TAPC was deposited on the hole injection layer as the hole transport material 140 .

[0065] Then, TCTA was evaporated to form an electron blocking layer 150 with a thickness of 5 nm.

[0066] Then, a luminescent layer 160 with a thickness of 20nm is vapor-deposited on the electron blocking layer, wherein the compound of the present invention is the host luminescent material, and the weight ratio is 3% Ir(ppy) 3 As a phosphorescent doping guest material.

[0067] Th...

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Abstract

The invention provides a dicarbazole benzene derivative. The dicarbazole benzene derivative adopts the structural formula as follows: FORMULA; the dicarbazole benzene derivative has relatively good stability, and can be applied to the field of organic electroluminescent devices, organic solar cells, organic thin film transistors or organic photoreceptors; when the dicarbazole benzene derivative isapplied to the organic electroluminescent device, the working voltage can be reduced and the device efficiency can be improved, so that the dicarbazole benzene derivative is a luminescent material with excellent performance. The invention further provides the organic electroluminescent device. The organic electroluminescent device comprises an anode, a cathode and an organic layer, wherein the organic layer comprises at least one of a luminescent layer, a hole injection layer, a hole transport layer, a hole blocking layer, an electron injection layer and an electron transport layer; at leastone layer in the organic layer contains a compound shown as the structural formula I. The organic electroluminescent device prepared from the dicarbazole benzene derivative has relatively high luminescent efficiency and light purity.

Description

technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to a dicarbazole benzene derivative and its application, 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 technology, or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/86C07D401/14C07D403/14H01L51/54C09K11/06
CPCC09K11/06C07D209/86C07D401/14C07D403/14C09K2211/1044C09K2211/1059C09K2211/1007C09K2211/1029H10K85/654H10K85/6572Y02E10/549
Inventor 黄锦海苏建华
Owner SHANGHIA TAOE CHEM TECH CO LTD
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