Organic electroluminescent device containing light extraction layer material

A technology of electroluminescent devices and light extraction layers, applied to organic compounds and their applications in organic electroluminescent devices, in the field of organic electroluminescent devices containing light extraction layer materials, can solve the problem of high evaporation temperature of inorganic materials, Slow evaporation rate and other issues, to achieve the effect of improving light extraction efficiency, high refractive index, and avoiding adverse effects

Active Publication Date: 2021-05-28
GUANGZHOU CHINARAY OPTOELECTRONICS MATERIALS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

In 2003, Riel et al. tried to vapor-deposit the inorganic compound ZnSe with a high refractive index (n=2.6) on the cathode, and use the difference in refractive index between the functional layers to improve the light extraction efficiency, but it was limited by the evaporation of inorganic materials. Due to the high temperature and slow evaporation rate, these compounds have not been widely used in organic electroluminescent devices.

Method used

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  • Organic electroluminescent device containing light extraction layer material
  • Organic electroluminescent device containing light extraction layer material
  • Organic electroluminescent device containing light extraction layer material

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specific Embodiment

[0203] The synthesis method of the compound according to the present invention is exemplified, but the present invention is not limited to the following examples.

[0204]

[0205] Synthesis of compound C-1:

[0206]

[0207] Compound 1-1 (4.86g, 15mmol), 1-2 (8.16g, 30mmol), potassium carbonate (6.26g, 45mmol), tetrakis (triphenylphosphine) palladium (0.52g, 0.45mmol) were placed in toluene In a three-necked flask with methanol (volume ratio 3:1), nitrogen was replaced three times, and the temperature was gradually raised to 80°C, and the reaction was stirred. After the TLC plate reactants disappeared, remove the heat source. After the system was cooled, water was added, the organic layer was separated, extracted three times with ethyl acetate, concentrated under reduced pressure, and passed through a silica gel column to obtain 4.19 g of compound I-3 with a yield of 45%.

[0208] Compound 1-3 (3.73g, 6mmol) was dissolved in anhydrous toluene, and 1-4 (0.92g, 6mmol), ...

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Abstract

In order to improve the device performance, especially the light extraction efficiency, of an organic electroluminescent device, the invention provides an organic electroluminescent device containing a light extraction layer, and the material of the light extraction layer is selected from triarylamine compounds containing triphenylene and electron withdrawing groups. The light extraction material provided by the invention has a relatively high extinction coefficient in an ultraviolet region and a relatively high refractive index in a visible light region, and can reduce the damage of external high-energy light to internal materials of organic electroluminescent display equipment, improve the light extraction rate and improve the luminous efficiency of the device.

Description

[0001] This application claims the priority of the Chinese patent application with the application number 201911098682.3 submitted to the China Patent Office on November 12, 2019, entitled "An Organic Electroluminescent Device Containing a Light Extraction Layer Material", the entire content of which is incorporated by reference incorporated in this application. technical field [0002] The invention relates to the technical field of organic electroluminescence, in particular to an organic electroluminescence device containing a light extraction layer material. The present invention further relates to an organic compound and its application in organic electroluminescent devices. Background technique [0003] Organic electroluminescent display devices are a type of self-luminous display devices, which generate excitons through the transfer and recombination of carriers between functional layers, and rely on organic compounds or metal complexes with high quantum efficiency to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54C07D213/38C07D213/74C07D215/12C07D241/38C07D401/04C07D251/24C07D239/74C07D277/66C07D235/18C07D471/04C07D498/04C07D413/04C07D417/04C07D263/57C07D241/44C07D241/42C07D263/56C07D277/82C07D513/04C07D235/08C07D413/12C07D401/14C07D401/12C07D403/12C07D417/12C07D417/14C07D519/00C07D221/08C07D239/94C07D263/58C07D235/30C07D251/22C07D277/62C07D487/04
CPCC07D213/38C07D213/74C07D215/12C07D241/38C07D401/04C07D251/24C07D239/74C07D277/66C07D235/18C07D471/04C07D498/04C07D413/04C07D417/04C07D263/57C07D241/44C07D241/42C07D263/56C07D277/82C07D513/04C07D235/08C07D413/12C07D401/14C07D401/12C07D403/12C07D417/12C07D417/14C07D519/00C07D221/08C07D239/94C07D263/58C07D235/30C07D251/22C07D277/62C07D487/04H10K50/858H10K2102/00C07C211/33C07C211/54C07C211/61C07D209/02C07D213/02C07D215/00C07D217/00C07D235/04C07D253/02C07D269/02C09K11/06H10K50/80H10K50/00
Inventor 李涛龙芷君杨曦宋晶尧
Owner GUANGZHOU CHINARAY OPTOELECTRONICS MATERIALS
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