Capping layer material and preparation method thereof, organic electroluminescent device and display device

A technology of capping layer and organic layer, applied in the field of chemistry and organic luminescent materials, can solve the problems of low luminous efficiency and cannot meet high refractive index, and achieve high refractive index, improve luminous efficiency, improve luminous efficiency and service life. Effect

Active Publication Date: 2021-08-24
JILIN OPTICAL & ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the refractive index of the existing capping layer materials is generally below 1.9, which cannot meet the requirements of high refractive index, and the luminous efficiency is low

Method used

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  • Capping layer material and preparation method thereof, organic electroluminescent device and display device
  • Capping layer material and preparation method thereof, organic electroluminescent device and display device
  • Capping layer material and preparation method thereof, organic electroluminescent device and display device

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preparation example Construction

[0047] In the above technical solution, the preparation method of the capping layer material may specifically include the following steps:

[0048] S1. Under the protection of a protective atmosphere such as nitrogen, dissolve raw material A (1.0eq) and raw material B (1.0eq) in toluene, ethanol and water (Vtol:V:V=3:0.5-1.5:0.5-1.5) Add tetrakistriphenylphosphine palladium (0.005-0.015eq) and potassium carbonate (1.5-2.5eq) to the mixed solution, stir evenly, heat up to 90±2°C, and reflux for 4-6 hours, after the solution is cooled to room temperature , retain the organic phase, and then extract the aqueous phase with ethyl acetate; after combining the organic phases, use anhydrous magnesium sulfate to dry, and use a rotary evaporator to remove the solvent to obtain a solid organic matter; recrystallize in toluene, filter, and The filter cake was rinsed with petroleum ether and dried in an oven at 65±2°C for 10-14 hours to obtain Intermediate 1.

[0049] S2. Under the protec...

Embodiment 1

[0054] This embodiment provides a capping layer material, and its preparation method is as follows:

[0055] step 1:

[0056]

[0057] Under nitrogen protection, raw material A-6 (30.00mmol) and raw material B-6 (30.00mmol) were dissolved in a mixed solution of 220.00ml toluene, ethanol and water (Vtol:V:V=3:1:1), Add tetrakistriphenylphosphine palladium (0.30mmol) and potassium carbonate (60.00mmol), stir evenly, raise the temperature to 90°C, and reflux for 5 hours. After the solution is cooled to room temperature, keep the organic phase, and then extract the water with ethyl acetate phase; after combining the organic phases, drying was performed using anhydrous magnesium sulfate, and the solvent was removed using a rotary evaporator to obtain solid organic matter. Place it in toluene for recrystallization, filter, rinse the filter cake with petroleum ether, and dry it in a 65°C oven for 12 hours to obtain intermediate 1 (15.98g, yield: 86.43%).

[0058] Step 2:

[005...

Embodiment 2

[0074] This embodiment provides a capping layer material, and its preparation method is as follows:

[0075] step 1:

[0076]

[0077] Under nitrogen protection, raw material A-15 (30.00mmol) and raw material B-15 (30.00mmol) were dissolved in a mixed solution of 220.00ml toluene, ethanol and water (Vtol:V:V=3:1:1), Add tetrakistriphenylphosphine palladium (0.30mmol) and potassium carbonate (60.00mmol), stir evenly, raise the temperature to 90°C, and reflux for 5 hours. After the solution is cooled to room temperature, keep the organic phase, and then extract the water with ethyl acetate phase; after combining the organic phases, drying was performed using anhydrous magnesium sulfate, and the solvent was removed using a rotary evaporator to obtain solid organic matter. Place it in toluene for recrystallization, filter, rinse the filter cake with petroleum ether, and dry it in a 65°C oven for 12 hours to obtain intermediate 1 (14.37g, yield: 86.41%).

[0078] Step 2:

[0...

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Abstract

The invention discloses a capping layer material and a preparation method thereof, an organic electroluminescent device and a display device, and belongs to the technical field of chemical and organic luminescent materials. The capping layer material has a structural general formula shown in the specification, in the formula, X, Y and Z independently represent any one of O, S, CR3R4, SiR5R6 and NR7. When the capping layer material is used as the capping layer of the OLED device, the light extraction efficiency of the OLED device can be improved. Besides, the capping layer material has a relatively small extinction coefficient in a blue light area, almost does not absorb blue light, is beneficial to improving the luminous efficiency, effectively blocks water and oxygen in an external environment, protects the OLED device from being eroded by water and oxygen, and can improve the luminous efficiency and prolong the service life of the OLED device.

Description

technical field [0001] The invention relates to the technical field of chemistry and organic luminescent materials, in particular to a capping layer material and a preparation method, an organic electroluminescent device and a display device. Background technique [0002] Organic electroluminescence (Organic Light Emission Diodes, OLED) device is a new flat panel display. Existing OLED devices generally include an anode and a cathode disposed on a substrate, and organic layers such as a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer disposed between the anode and the cathode. [0003] In recent years, a light-emitting element with a top emission structure that emits light from above using a metal with a high work function as an anode has begun. In the light-emitting element of the top emission structure, the cathode system uses semi-transparent electrodes such as LiF / Al / Ag, Ca / Mg, and LiF / Mg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D413/14C07D417/14H01L51/52H01L27/32H01L51/54
CPCC07D413/14C07D417/14H10K59/00H10K85/636H10K85/657H10K50/85H10K50/84
Inventor 黄悦张鹤汪康徐佳楠马晓宇于丹阳张颖
Owner JILIN OPTICAL & ELECTRONICS MATERIALS
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