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Compound, display panel and display device

A display panel and compound technology, applied in the field of organic electroluminescent materials, to achieve the effects of improving device efficiency, increasing luminous efficiency, and reducing overlap

Active Publication Date: 2021-09-07
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few TADF materials that have been discovered so far, so it is urgent to develop new TADF materials that can be used in OLEDs.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Synthesis of Compound M1

[0110] Synthesis of Compound B

[0111]

[0112] In a 250ml three-neck flask, 9.40g (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 an oil, which was crystallized using toluene / EtOH to obtain a solid. 9.12 g (20 mmol) of solid, anhydrous toluene solution (70 mL) and 2.5 g (10 mmol) of boron tribromide were sequentially added to a 200 mL pressure tube. Stir at 120°C for 12h. After the reaction H 2 O (100 mL) quenched. The...

Embodiment 2

[0141] Synthesis of compound M2

[0142] Synthesis of Compound B

[0143]

[0144] In a 250ml three-neck flask, 9.40g (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 an oil, which was crystallized using toluene / EtOH to obtain a solid. 9.12 g (20 mmol) of solid, anhydrous toluene solution (70 mL) and 2.5 g (10 mmol) of boron tribromide were successively added into a 200 mL stuffy jar. Stir at 120°C for 12h. After the reaction H 2 O (100 mL) quenched. The ...

Embodiment 3

[0173] Synthesis of Compound M3

[0174] Synthesis of Compound B

[0175]

[0176] In a 250ml three-neck flask, 9.40g (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 an oil, which was crystallized using toluene / EtOH to obtain a solid. 9.12 g (20 mmol) of solid, anhydrous toluene solution (70 mL) and 2.5 g (10 mmol) of boron tribromide were successively added into a 200 mL stuffy jar. Stir at 120°C for 12h. After the reaction H 2 O (100 mL) quenched. The ...

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Abstract

The present invention belongs to the technical field of OLED and provides a kind of compound with the structure shown in chemical formula 1, wherein, L 1 , L 2 and L 3 Each is independently selected from single bond, C6-C30 aryl or fused aryl, C4-C30 heteroaryl or fused heteroaryl; R 1 , R 2 and R 3 At least one is an electron-donating group and at least one is an electron-accepting group; the electron-donating group is mainly selected from carbazole-based groups, acridine-based groups, and diarylamine-based groups; the electron-accepting group is mainly It is selected from nitrogen-containing heterocycles and cyano-containing substituents. The boroindenofluorene structure in the compounds of the present invention not only serves as an electron acceptor group, but also as a linking group. In the compound of the present invention, by inserting a group with a large steric hindrance on the boron atom, while enhancing the effective charge transfer in the molecule, the aggregation of the compound molecules is avoided, and the direct stacking of the conjugated planes to form a π Aggregation or excimer associations, thereby improving the luminous efficiency. The invention also provides a display panel and a display device.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent materials, in particular to a boron heterocyclic compound, a display panel and a display device including the compound. Background technique [0002] With the development of electronic display technology, organic light-emitting devices (OLEDs) are widely used in various display devices, and the research and application of OLED light-emitting materials are also increasing. [0003] According to the light-emitting mechanism, the materials used for the OLED light-emitting layer mainly include the following four types: [0004] (1) fluorescent material; (2) phosphorescent material; (3) triplet-triplet annihilation (TTA) material 0; (4) thermally activated delayed fluorescence (TADF) material. [0005] For fluorescent materials, according to spin statistics, the ratio of singlet and triplet excitons in excitons is 1:3, so the maximum internal quantum yield of fluorescent materials d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/02C09K11/06H01L51/54
CPCC07F5/027C09K11/06C09K2211/1029C09K2211/1096C09K2211/1007C09K2211/1059C09K2211/1033C09K2211/104C09K2211/1088C09K2211/1092C09K2211/1074C09K2211/1011C09K2211/1044C09K2211/1048H10K85/615H10K85/622H10K85/631H10K85/626H10K85/653H10K85/654H10K85/6565H10K85/657H10K85/6572H10K85/6574Y02T90/167Y04S30/12
Inventor 汪奎王鹏叶添昇
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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