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Blue light host material and blue light emitting device

A blue-light host material and host material technology, applied in luminescent materials, electric solid-state devices, semiconductor devices, etc., can solve the problems of lack of high efficiency and long life, and achieve high thermal stability, large energy band width, and high fluorescence quantum production rate effect

Active Publication Date: 2022-03-11
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a blue light host material and a blue light emitting device, aiming to solve the existing problem of lacking a host material with both high efficiency and long life

Method used

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  • Blue light host material and blue light emitting device
  • Blue light host material and blue light emitting device
  • Blue light host material and blue light emitting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This example provides a blue light host material, which is denoted as compound 72, and its synthesis route is as follows:

[0037]

[0038] The synthetic method of compound 72 specifically comprises the following steps:

[0039] Synthesis of intermediate M1: 5-bromo-3-nitrobenzothiophene (7.71g, 30mmol), 3-bromo-1-hydroxynaphthalene (10.0g, 45mmol), anhydrous potassium carbonate (2.07g, 15mmol) With 100mL of absolute ethanol, the temperature was raised to reflux and stirred for 24 hours, cooled to room temperature, and the crude product was purified by silica gel column chromatography (petroleum ether / ethyl acetate was 5 / 1 (volume ratio)) to obtain M1 with a yield of 40%. 1 H NMR (500MHz, Chloroform-d) δ8.23(dd, J=7.2, 1.8Hz, 1H), 8.04–7.40(m, 3H), 7.89(d, J=7.5Hz, 1H), 7.54(dd, J=7.5, 1.6Hz, 1H), 7.50–7.40(m, 2H).

[0040] Synthesis of intermediate M2: M1 (25.8g, 60mmol), 2-boronic naphthalene (10.32g, 60mmol), tetrakistriphenylphosphine palladium (0.2g) were diss...

Embodiment 2

[0043] This example provides a blue light host material, which is denoted as compound 75, and its synthesis route is as follows:

[0044]

[0045] The synthesis of intermediate M1 is shown in Example 1.

[0046] Synthesis of intermediate M3: M1 (25.8g, 60mmol), 2-boronic naphthalene (10.32g, 60mmol), tetrakistriphenylphosphine palladium (0.2g) were dissolved in toluene / ethanol / water (200mL / 40mL / 40mL). After stirring at 85°C for 15 hours, the mixture was filtered, extracted with chloroform, and the aqueous phase was extracted three times with 60 mL of ethyl acetate. The organic phases were combined and dried over anhydrous magnesium sulfate. The crude product was subjected to silica gel column chromatography (petroleum ether / ethyl acetate 5 / 1 (volume ratio)) to obtain M3 with a yield of 32%. 1 H NMR (500MHz, Chloroform-d) δ8.13–8.05 (m, 3H), 8.00 (td, J = 7.4, 1.7Hz, 2H), 7.88 (ddt, J = 7.7, 6.0, 2.0Hz, 2H), 7.79 (dd, J=7.5, 1.5Hz, 1H), 7.70 (t, J=1.6Hz, 1H), 7.54–7.43 (...

Embodiment 3

[0049] This example provides a blue light host material, which is denoted as compound 111, and its synthesis route is as follows:

[0050]

[0051] The synthetic method of compound 111 specifically comprises the following steps:

[0052] The synthesis of intermediate M1 is shown in Example 1.

[0053] The synthesis of intermediate M2 is shown in Example 1.

[0054] Synthesis of compound 111: M2 (28.7g, 60mmol), deuterated phenylboronic acid (7.32g, 60mmol), tetrakistriphenylphosphine palladium (0.2g) were dissolved in toluene / ethanol / water (300mL / 60mL / 60mL). After stirring at 85°C for 15 hours, the mixture was filtered, extracted with chloroform, and the aqueous phase was extracted three times with 100 mL of ethyl acetate. The organic phases were combined and dried over anhydrous magnesium sulfate. The crude product was subjected to silica gel column chromatography (petroleum ether / ethyl acetate 5 / 1 (volume ratio)) to obtain compound 111 with a yield of 86%. 1 H NMR (5...

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Abstract

The invention discloses a blue light host material and a blue light emitting device, the structural formula of the host material is shown in the following formula: in the formula, X and Y are independently S, O or Se; at least two of R1-R10 are independently selected from benzene rings or aromatic groups. The compound with the structural formula is used as a main body material of the organic electroluminescent device, and the prepared device has the advantages of high efficiency, long service life and the like.

Description

technical field [0001] The invention relates to the field of light-emitting devices, in particular to a blue-light host material and a blue-light light-emitting device. Background technique [0002] Organic Light-emitting Diodes (OLEDs), as a new generation of display technology, has gradually become an important part of the current display technology due to its self-illumination, flexibility, high contrast, power saving and many other advantages, and has received academic attention. world and industry attention. Blue light is an important part of displaying light color, and blue light OLEDs still face many problems, including low efficiency, serious efficiency roll-off, and poor color purity. At present, in OLEDs, in order to better improve device performance, doping the light-emitting layer is a common method, which can effectively alleviate the accumulation of light-emitting molecules. A suitable host material can reduce exciton quenching by reducing the concentration o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D495/04C07D517/04C09K11/06H01L51/54H01L51/50
CPCC07D495/04C07D517/04C09K11/06C09K2211/1007C09K2211/1011C09K2211/1096C09K2211/1025H10K85/615H10K85/626H10K85/657H10K50/11
Inventor 孟鸿吴李杰商一凡
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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