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Organic electroluminescent material and organic electroluminescent device based on triazolopyridine

An electroluminescent material, azolopyridine technology, applied in luminescent materials, electrical solid devices, organic chemistry, etc., can solve the problems of device photoelectric performance decline, device efficiency roll-off, etc.

Active Publication Date: 2019-11-15
湖北尚赛光电材料有限公司
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  • Abstract
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Problems solved by technology

[0004] The object of the present invention is to provide a kind of organic electroluminescence material and device based on triazolopyridine, solve current OLED device electron transport layer due to electron / hole migration The mismatch of speed leads to the problem of the decline of the photoelectric performance of the device, and the serious problem of the device efficiency roll-off of the phosphorescent device at high current density, so that the OLED device has an excellent comprehensive performance in terms of efficiency, thermal stability, light color, and lifetime. performance

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Embodiment Construction

[0050] It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0051] Synthesis of intermediate 2-bromo-[1,2,4]triazol[1,5-a]pyridine:

[0052]

[0053] S1. In a 100mL reaction flask, add pyridin-2-amine (1.88g, 20mmol), ethyl isothiocyanate (2.89g, 22mmol), 50mL epoxy bicyclic solvent, and stir the reaction at room temperature for 10-14h Afterwards, the reaction solution was concentrated, and then, 75 mL of methanol / ethanol mixed solvent with a volume ratio of 1:1, N,N-diethylethylamine (4.05 g, 40 mmol), hydroxylamine hydrochloride (4.17 g , 60mmol), reacted at 60°C for 2h, cooled to room temperature, cold crystallized, filtered, and the filter cake was the crude product of [1,2,4]triazol[1,5-a]pyridin-2-amine ;

[0054] S2. In a 250mL reaction flask, add the above [1,2,4]triazol[1,5-a]pyridin-2-amine, copper bromide (6.7g, 30mmol), 100mL ac...

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Abstract

The invention relates to the field of the photoelectric material applied technology, and discloses an organic electroluminescent material and an organic electroluminescent device based on triazolopyridine. The organic electroluminescent material finely regulates and controls triazolopyridyl groups through specific functional groups. The invention provides an electron transport material and a light-emitting host material with excellent comprehensive performance. The technical problems that an electron transport material is not matched with the hole transport rate, and the stability is poor in the prior art are solved, the technical problems of roll-off of the efficiency of a green light host material and impure light color are also solved effectively, thus, the comprehensive performance ofthe device in the aspects of driving voltage, efficiency, light color, thermal stability, service life and the like is improved, and industrialization development of optoelectronic materials is speeded up.

Description

technical field [0001] The invention belongs to the field of photoelectric material application technology, and in particular relates to a triazolopyridine-based organic electroluminescent material and an organic electroluminescent device. Background technique [0002] Organic light-emitting diode (OLED) has become one of the most promising new display technologies due to its advantages such as self-luminescence, low driving voltage, high contrast, wide viewing angle, and wide temperature range. Through the unremitting efforts of researchers and enterprises, researchers have successively developed many high-performance luminescent materials and auxiliary electrode materials, but commonly used hole transport materials such as N,N'-dinaphthyl-N,N'- Diphenyl-benzidine (NPB), N,N'-bis(3-methylphenyl)-N,N'-diphenyl-1,1-diphenyl-4,4-diamine (TPD ), their hole transport rate can reach 10- 2 cm 2 V- 1 S- 1 order of magnitude, while the widely used aluminum 8-hydroxyquinoline (A...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07D519/00C07D471/04H01L51/50H01L51/54
CPCC09K11/06C07D519/00C07D471/04C09K2211/1007C09K2211/1011C09K2211/1029C09K2211/1033C09K2211/1037C09K2211/1044C09K2211/1059C09K2211/1014C09K2211/1092C09K2211/1088Y02E10/549
Inventor 穆广园庄少卿任春婷徐鹏
Owner 湖北尚赛光电材料有限公司
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