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Compound, display panel and display device

A display panel and compound technology, which is applied in the field of display panels, display devices, and compounds, can solve the problems of unsatisfactory luminescence wavelength, weakened planarity, and poor overlap of luminescence spectrum, so as to improve the utilization rate of excitons, reduce device voltage, Effect of Improving Fluorescence Quantum Efficiency

Active Publication Date: 2021-08-27
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of luminescent dye still has some disadvantages: (1) It is difficult to purify and separate, and the preparation cost is high; (2) The emission wavelength is not ideal, and the emission color is yellowish; (3) There is a serious concentration quenching effect, so it can only be used as an object. The luminescent material realizes red light emission; (4) the absorption spectrum does not overlap well with the luminescence spectrum of host materials such as Alq3
The disadvantage of this method is: due to the increase of the molecular structure, the intramolecular planarity is weakened, and it is easy to produce aggregation-induced fluorescence quenching phenomenon in high concentration or solid film state.
Therefore, it is necessary to develop new luminescent materials to solve the problem of fluorescent quenching induced by the aggregation of luminescent material molecules after the wavelength of the luminescent material is red-shifted in the prior art.

Method used

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  • Compound, display panel and display device
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  • Compound, display panel and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Synthesis of Compound M1

[0077] The synthetic route of compound M1 is as follows.

[0078]

[0079] The specific synthesis steps of compound M1 are as follows.

[0080]

[0081] In a 200ml three-necked flask, 8.84g (20mmol) of substrate A (20mmol) and THF (80mL) were added to dissolve, and nitrogen replacement was performed three times. Cool down to -78°C, and when the temperature reaches, control the temperature below -65°C and slowly add n-BuLi 20mL (50mmol) dropwise, and stir for 30min after the dropwise addition is complete. Then 4.35 g (40 mmol) of TMS-Cl was slowly added dropwise, and the temperature was raised to 0° C. for 4 h. After completion, add ice water to quench. DCM (80mL*2) was added for extraction. The collected organic phase was rotary evaporated to obtain a pale yellow oil. Crystallization using Tol / EtOH afforded a pale yellow solid. 6.45 g (15 mmol) of light yellow solid, anhydrous toluene solution (70 mL) and 0.76 mL (8 mmol) of boron ...

Embodiment 2

[0097] Synthesis of compound M2

[0098]

[0099] The specific synthesis steps of compound M2 are as follows.

[0100]

[0101] In a 200ml three-necked flask, 8.84g (20mmol) of substrate A (20mmol) and THF (80mL) were added to dissolve, and nitrogen replacement was performed three times. Cool down to -78°C, and when the temperature reaches, control the temperature below -65°C and slowly add n-BuLi 20mL (50mmol) dropwise, and stir for 30min after the dropwise addition is complete. Then 4.35 g (40 mmol) of TMS-Cl was slowly added dropwise, and the temperature was raised to 0° C. for 4 h. After completion, add ice water to quench. DCM (80mL*2) was added for extraction. The collected organic phase was rotary evaporated to obtain a pale yellow oil. Crystallization using Tol / EtOH afforded a pale yellow solid. 6.45 g (15 mmol) of light yellow solid, anhydrous toluene solution (70 mL) and 0.76 mL (8 mmol) of boron tribromide were successively added into a 200 mL stuffy jar....

Embodiment 3

[0121] Synthesis of Compound M3

[0122]

[0123] The specific synthesis steps of compound M3 are as follows.

[0124]

[0125] In a 200ml three-necked flask, 8.84g (20mmol) of substrate A (20mmol) and THF (80mL) were added to dissolve, and nitrogen replacement was performed three times. Cool down to -78°C, and when the temperature reaches, control the temperature below -65°C and slowly add n-BuLi 20mL (50mmol) dropwise, and stir for 30min after the dropwise addition is complete. Then 4.35 g (40 mmol) of TMS-Cl was slowly added dropwise, and the temperature was raised to 0° C. for 4 h. After completion, add ice water to quench. DCM (80mL*2) was added for extraction. The collected organic phase was rotary evaporated to obtain a pale yellow oil. Crystallization using Tol / EtOH afforded a pale yellow solid. 6.45 g (15 mmol) of light yellow solid, anhydrous toluene solution (70 mL) and 0.76 mL (8 mmol) of boron tribromide were successively added into a 200 mL stuffy jar....

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Abstract

The invention provides a compound, a display panel and a display device. The compound has a structure shown in formula (I) wherein, R 1 and R 2 As an electron-donating group, independently selected from C1-C20 alkyl, C3-C20 cycloalkyl, C1-C20 alkoxy, phenyl, biphenyl, naphthyl, anthracenyl, phenanthrenyl, acenaphthenyl , pyrenyl, perylene, fluorenyl, spirobifluorenyl, base, triphenanthrenyl, benzanthracenyl, fluoranthenyl, perylenyl, furyl, benzofuryl, substituted or unsubstituted dibenzo Furyl, substituted or unsubstituted thienyl, benzothienyl, dibenzothienyl, phenoxazinyl, phenazinyl, phenothiazinyl, thianthryl, carbazolyl, acridinyl, diaryl Any one of the amine groups; m is an integer selected from 1 to 4. The compound designed in the present invention is a material with AIE characteristics and TADF characteristics, which can convert triplet excitons into singlet excitons through the process of reverse intersystem jumping, realize radiative luminescence, and improve the utilization rate of excitons in luminescent materials.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent materials, in particular to a compound, a display panel and a display device including the compound. Background technique [0002] Among organic electroluminescent materials, the research, preparation and application of red light materials are relatively backward. There are two main reasons for this. First, the energy level of HOMO (highest occupied orbit) and LUMO (lowest unoccupied orbital) of red light materials ) Energy range between energy levels (E g ) is generally small, which makes it difficult to match the energy levels, and the holes and electrons cannot effectively recombine and emit light in the light-emitting layer; The extinguishing phenomenon is serious, which affects its luminous performance. Therefore, the research and preparation of red light materials has become one of the research hotspots in the field of fluorescent materials. [0003] At present, the mai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/02C09K11/06H01L51/54G09F9/30
CPCC07F5/027C09K11/06G09F9/30C09K2211/1029C09K2211/1044C09K2211/1096C09K2211/1033C09K2211/1007C09K2211/1037C09K2211/1014H10K85/631H10K85/636H10K85/657H10K85/6572
Inventor 汪奎张正川
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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