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Thermal-activated delayed fluorescent material based on carbazole and phosphine oxide as well as preparation method and application

A technology of delayed fluorescence and thermal excitation, applied in luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., can solve the problems of low blue color purity, poor material singleness, and low efficiency

Active Publication Date: 2017-11-07
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of poor singleness of existing TADF blue light guest materials, low blue light color purity and low efficiency, and to provide a thermally excited delayed fluorescent material based on carbazole and phosphine oxide and its preparation method and application

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  • Thermal-activated delayed fluorescent material based on carbazole and phosphine oxide as well as preparation method and application
  • Thermal-activated delayed fluorescent material based on carbazole and phosphine oxide as well as preparation method and application
  • Thermal-activated delayed fluorescent material based on carbazole and phosphine oxide as well as preparation method and application

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specific Embodiment approach 1

[0090] Specific implementation mode 1: This implementation mode is based on the structure of the thermally excited delayed fluorescent material based on carbazole and phosphine oxide.

[0091]

[0092] Wherein, the R is H or t-C 4 h 9 .

specific Embodiment approach 2

[0093] Embodiment 2: This embodiment is a thermally excited delayed fluorescent material based on carbazole and phosphine oxide The structure is Its preparation method is specifically completed according to the following steps:

[0094] 1. Add 1,4-dibromo-2,5-difluorobenzene, nitrogen-containing heterocyclic compound and potassium carbonate into dimethyl sulfoxide, and then react in an argon atmosphere at a temperature of 120°C to 160°C 6h to 12h to obtain the mixed solution I containing the reactant; use the mixed solution of water and dichloromethane to extract the mixed solution I containing the reactant, and then use anhydrous sodium sulfate to dry the extracted organic layer, and then Using a rotary evaporator to evaporate the solvent under reduced pressure to obtain a crude reaction product I; using the solvent I as an eluent, purify the crude reaction product I by column chromatography to obtain a reaction product I;

[0095] The solvent I described in step 1 is a m...

specific Embodiment approach 3

[0107] Specific Embodiment Three: Thermally Excited Delayed Fluorescence Materials Based on Carbazole and Phosphine Oxygen The structure is Its preparation method is specifically completed according to the following steps:

[0108] 1. Add 1,5-dibromo-2,4-difluorobenzene, nitrogen-containing heterocyclic compound and potassium carbonate into dimethyl sulfoxide, and then react in an argon atmosphere at a temperature of 120°C to 160°C 6h to 12h to obtain the mixed solution I containing the reactant; use the mixed solution of water and dichloromethane to extract the mixed solution I containing the reactant, and then use anhydrous sodium sulfate to dry the extracted organic layer, and then Using a rotary evaporator to evaporate the solvent under reduced pressure to obtain a crude reaction product I; using the solvent I as an eluent, purify the crude reaction product I by column chromatography to obtain a reaction product I;

[0109] The nitrogen-containing heterocyclic compound...

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Abstract

The invention provides a thermal-activated delayed fluorescent (TADF) material based on carbazole and phosphine oxide as well as a preparation method and application and relates to thermal-activated delayed fluorescent materials as well as a preparation method and application, aiming at solving the problems that an existing TADF blue-light guest material has poor singleness, low blue-light color purity and low efficiency. The structure of the thermal-activated delayed fluorescent material based on the carbazole and the phosphine oxide is shown in the description. The preparation method comprises the following step of preparing the thermal-activated delayed fluorescent material based on the carbazole and the phosphine oxide by utilizing 1,4-dibromo-2,5-difluorobenzene, a nitrogen heterocyclic ring containing compound, potassium carbonate, dimethyl sulfoxide, tetrahydrofuran, n-butyl lithium and diphenyl phosphorus chloride. The thermal-activated delayed fluorescent material based on the carbazole and the phosphine oxide is used as a main body luminescent material or a guest luminescent material and is applied to thermal-activated delayed fluorescent electroluminescent devices; the thermal-activated delayed fluorescent material is used as the main body luminescent material and is applied to a phosphorescent device or a warm white light device. The invention can provide the thermal-activated delayed fluorescent material based on the carbazole and the phosphine oxide as well as the preparation method and the application.

Description

technical field [0001] The invention relates to a heat-excited delayed fluorescent material, a preparation method and an application. Background technique [0002] Preparation of white organic light-emitting diodes (Organic Light Emitting Diodes, OLED) has great significance in solid-state lighting and full-color display. Many warm white light devices are composed of a mixture of yellow and blue light. The luminous efficiency of yellow light and blue light plays an important role in the whole device. Therefore, the construction of high-efficiency blue and yellow light devices is beneficial to improve the performance of warm white light devices. [0003] Organic molecules with Thermally Activated Delayed Fluorescence (TADF) properties are usually donor-acceptor molecules with small triplet and singlet energy gaps. The small singlet and triplet energy gap can convert triplet excitons into singlet excitons, thereby improving the utilization of excitons and achieving 100% int...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07F9/572H01L51/54H01L51/56H01L51/50
CPCC09K11/06C07F9/572C09K2211/1007C09K2211/1014C09K2211/1029H10K85/6572H10K50/00H10K71/00
Inventor 许辉梁倩倩段春波韩春苗
Owner HEILONGJIANG UNIV
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