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Organic electroluminescent material, a preparation method and applications thereof

An electroluminescent material and luminescent technology, applied in the direction of luminescent materials, organic chemistry, chemical instruments and methods, etc., can solve problems such as lifespan, efficiency, power consumption, and thermal stability unsatisfactory

Inactive Publication Date: 2020-02-25
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, the materials used for the organic material layer of organic light-emitting devices are not satisfactory in terms of lifetime, efficiency, power consumption, thermal stability, etc., so it is necessary to develop and study new materials

Method used

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  • Organic electroluminescent material, a preparation method and applications thereof
  • Organic electroluminescent material, a preparation method and applications thereof
  • Organic electroluminescent material, a preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0127] In this example, compound 1 was prepared by the following preparation method, and the reaction scheme is as follows:

[0128]

[0129] The specific preparation method and conditions are as follows: 4.5g of 8-trimethylsilane-7H-benzocarbazole, 5g of anhydrous cesium carbonate powder, 100mL of anhydrous 1,4-dioxane and 0.2g of Pd 2 dba 3 Add it to a 200mL three-neck bottle, vacuumize and replenish nitrogen for 30min. Keeping at 101° C., 2 g of 2,4,6-tribromo-1,3,5-hydrotriazine was added dropwise, and the reaction was refluxed in the dark for 24 hours. KBr was added dropwise, and the plate was tracked until the reaction was complete. The device was cooled to room temperature, crystallized by adding a large amount of water, and filtered with suction to obtain 4.2 g of solid, which was intermediate 1. 4.2 g of Intermediate 1, 5 g of anhydrous cesium carbonate powder, 100 mL of anhydrous 1,4-dioxane and 0.2 g of Pd 2 dba 3 Add it to a 200mL three-necked flask, under ...

Embodiment 2

[0132] In this example, compound 2 was prepared, and the preparation method was similar to that of compound 1, and the specific reaction process was as follows:

[0133]

[0134] Its preparation process is similar to the preparation of Example 1 Compound 1, except that the raw material of 8-trimethylsilane-7H-benzocarbazole is replaced by The yield of compound 2 was prepared in 44%.

[0135] Characterization data of compound 2: Tg(DSC) 120°C, purity 99.9%, 1 H NMR (400MHz, DMSO) δ7.32(s,3H),7.17(d,3H),7.16(d,3H),6.87(m,3H),6.76(d,3H),6.44(d,3H) ,5.96(s,3H),1.34(s,9H).

Embodiment 3

[0137] In this example, compound 3 was prepared, and the preparation reaction flow was as follows:

[0138]

[0139] The specific preparation method and conditions are as follows: 1.5g reactant 1, 4g anhydrous cesium carbonate powder, 100mL anhydrous 1,4-dioxane and 0.15g Pd 2 dba 3 Add it to a 200mL three-neck bottle, vacuumize and replenish nitrogen for 30min. Keeping at 101°C, 2g of 2-bromo-4,6trimethylsilane-hydrotriazine was added dropwise, and the reaction was refluxed in the dark for 24 hours. KBr was added dropwise, and the plate was tracked until the reaction was complete. The device was cooled to room temperature, and crystallized by adding a large amount of water, and suction filtered to obtain 2.8 g of solid, which was intermediate 2. 2.8 g of intermediate 2, 5 g of anhydrous cesium carbonate powder, 100 mL of anhydrous 1,4-dioxane and 0.2 g of Pd 2 dba 3 Put it into a 200mL three-necked flask, under nitrogen atmosphere, add 8-trimethylsilanecarbazole dropw...

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Abstract

The invention provides an organic electroluminescent material, a preparation method and applications thereof, wherein the organic electroluminescent material has a structure represented by the following formula I. According to the invention, the organic electroluminescent material has high charge transfer capability and high glass-transition temperature, and can prevent crystallization; and with the application of the organic electroluminescent material in OLED devices, the OLED device can have high efficiency, long service life, low driving voltage and wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of organic photoelectric materials, and relates to an organic electroluminescent material and its preparation method and application. Background technique [0002] In order to achieve excellent performance of an organic light emitting device, materials constituting an organic material layer, such as hole injection materials, hole transport materials, light emitting materials, electron transport materials, electron injection materials, etc., should be stable and have excellent efficiency. However, up to now, materials used for organic material layers of organic light-emitting devices are unsatisfactory in terms of lifetime, efficiency, power consumption, thermal stability, etc., and thus new materials need to be developed and researched. [0003] In order to improve lifetime and prevent crystallization of materials caused by Joule heat generated during evaporation, there is a strong demand for organic materia...

Claims

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Application Information

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IPC IPC(8): C07D487/22C09K11/06H01L51/50H01L51/54
CPCC07D487/22C09K11/06C09K2211/1029C09K2211/1044C09K2211/1074H10K85/6572H10K50/15H10K50/17H10K50/11
Inventor 李丹丹谭奇杨红领鄢亮亮
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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