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A sulfur-containing organic electrophosphorescent light-emitting material and its application

A phosphorescent light-emitting material and technology of light-emitting materials, applied in the field of organic electroluminescence display, can solve the problems of low phosphorescence efficiency, hinder commercialization, poor stability and lifespan, etc., to improve phosphorescence quantum efficiency, reduce power consumption and lifespan prolonged effect

Active Publication Date: 2022-07-12
北京燕化集联光电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the U.S. patent of US6687266 discloses a class of Ir complexes containing benzimidazole ligands. Due to the low phosphorescence efficiency, poor stability and lifespan of these compounds, the possibility of commercialization has been hindered. sex

Method used

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  • A sulfur-containing organic electrophosphorescent light-emitting material and its application
  • A sulfur-containing organic electrophosphorescent light-emitting material and its application
  • A sulfur-containing organic electrophosphorescent light-emitting material and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Example 1: Synthesis of Ligand P1

[0058]

[0059] The synthetic route is as follows:

[0060]

[0061] The specific experimental steps are:

[0062] (1) in the 2L there-necked flask equipped with mechanical stirring, add 2-fluoronitrobenzene (14.1g, 0.1mol), 2-bromoaniline (25.7g, 0.15mol), stir, argon protection, be warming up to 180 ℃, keep the reaction for more than 30 hours, during the reaction, the color gradually becomes red, and finally gradually becomes dark red. After the reaction, the organic phase was separated, extracted, dried, subjected to column chromatography, and the solvent was spin-dried to obtain 24.8 g of orange-red solid M1 with a yield of 85%.

[0063] (2) In a 1L three-necked flask equipped with mechanical stirring, add M1 (29.2g, 0.1mol), sodium sulfide nonahydrate (96g, 0.4mol), ethanol (200mL), water (100mL), nitrogen protection, heat to The reaction was refluxed for 3 hours, and the reaction was terminated. The organic phase was s...

Embodiment 2

[0070] Example 2: Synthesis of Ligand P2

[0071]

[0072] With reference to the synthesis steps of Example 1, only in step (3), 2-bromo-4-methylbenzoyl chloride is used instead of o-bromobenzoyl chloride, and other raw materials and steps are the same as those in Example 1 to obtain ligand P2.

[0073] Product MS (m / e): 346; elemental analysis (C 20 H 14 N 2 SO 2 ): theoretical value C: 69.36%, H: 4.05%, N: 8.09%; measured value C: 69.12%, H: 4.78%, N: 8.52%.

Embodiment 3

[0074] Example 3: Synthesis of Ligand P3

[0075]

[0076] Referring to the synthesis steps of Example 1, except that 2-bromo-4-methylaniline is used instead of 2-bromoaniline in step (1), other raw materials and steps are the same as those in Example 1, to obtain ligand P3.

[0077] Product MS (m / e): 346; elemental analysis (C 20 H 14 N 2 SO 2 ): theoretical value C: 69.36%, H: 4.05%, N: 8.09%; measured value C: 69.45%, H: 4.37%, N: 8.46%.

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Abstract

The invention relates to the technical field of organic electroluminescence display, specifically discloses a novel sulfur-containing organic electrophosphorescence luminescence material, and also discloses its application in organic electroluminescence devices. The sulfur-containing organic electrophosphorescent light-emitting material provided by the present invention has the structure shown by the general formula (I). When the organic electrophosphorescence light-emitting material of the present invention is applied to an organic electroluminescence device, the prepared electroluminescence device exhibits the superior properties of high purity, high brightness and high efficiency.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence display, specifically discloses a novel sulfur-containing organic electrophosphorescence luminescence material, and also discloses its application in organic electroluminescence devices. Background technique [0002] Electroluminescence display devices can be divided into inorganic electroluminescence display devices and organic electroluminescence display devices according to the different materials constituting the light-emitting layer. Compared with inorganic EL display devices, organic EL display devices have incomparable advantages, such as full-color emission in the visible spectral range, extremely high brightness, extremely low driving voltage, fast response time, and simple fabrication craftsmanship, etc. [0003] The research on organic electroluminescence started in the 1860s, when Pope first realized electroluminescence on anthracene single crystals, but at that ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/50H01L51/54
CPCC07F15/0033C09K11/06C09K2211/185C09K2211/1051C09K2211/1029C09K2211/1033H10K85/654H10K85/657H10K85/6572H10K85/342H10K50/11
Inventor 陈婷范洪涛梁现丽段陆萌杭德余曹占广班全志
Owner 北京燕化集联光电技术有限公司
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