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Organic Electroluminescent Devices

An electroluminescent device and luminescent technology, applied in the direction of electric solid-state devices, electrical components, luminescent materials, etc., can solve the problems of high cost and high cost of OLED, and achieve good luminous performance, good charge transport ability, and high fluorescence The effect of quantum efficiency

Active Publication Date: 2018-06-19
GUANGDONG AGLAIA OPTOELECTRONICS MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-efficiency phosphorescent materials widely used at present require the use of rare and precious metals such as iridium and platinum, and the cost is high, which is one of the important factors for the high cost of OLEDs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: the synthesis of compound 1

[0049]

[0050] Add 2g (0.018mol) of dimethylcarbamoyl chloride and 20ml of tetrahydrofuran solvent to the reaction vessel in turn, deoxygenate the device, pass in nitrogen protection, cool down to the temperature of the reaction solution to -75~-65°C, and slowly add 10ml of 1.6Mn-BuLi / THF solution, control the temperature of the reaction solution at -75~-65°C, after the dropwise addition, continue to maintain this temperature for 0.5-1h. Finally, 6g of compound 1-1 was added dropwise, and the temperature of the reaction solution was controlled at -75~-65°C. After the dropwise addition, the reaction was continued at this temperature for 0.5-1h, and then the reaction solution was moved to room temperature and reacted for 4-6h. Stop responding. Ethyl acetate / deionized water was added for extraction, and the aqueous layer was extracted with ethyl acetate again. The organic layers were combined, dried over anhydrous magnesium ...

Embodiment 2

[0051] Example 2: The following are application examples of the compounds of the present invention.

[0052] Device structure such as figure 1 . Device preparation method:

[0053] Firstly, the transparent conductive ITO glass (the glass substrate 10 with the anode 20 ) is cleaned sequentially by detergent solution, deionized water, acetone ultrasonically, isopropanol steam, and then treated with oxygen plasma for 5 minutes.

[0054] Then, 35 nm-thick NPB was vapor-deposited on the ITO as the hole transport layer 30 .

[0055] Then, mCP was evaporated as the electron / exciton blocking layer 40 to a thickness of 5 nm.

[0056] Then, a luminescent layer 50 with a thickness of 20 nm was evaporated, using mCP as the host material, compound 1 of the present invention as the dopant material, and the doping concentration was 3%.

[0057] Then, mCP was vapor-deposited as the exciton blocking layer 60 to a thickness of 10 nm.

[0058] Then, TPBi was vapor-deposited as the electron ...

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Abstract

The invention relates to an organic electroluminescent device, comprising an anode, a cathode and one or more organic layers, at least one of which contains a material with the following chemical formula I or II. Since the compound of the chemical formula (I) of the present invention has highly stable electron-withdrawing groups and electron-donating groups, there are stable chemical bonds between them, and there is no strong conjugation. These characteristics make the compound of formula (I) have high fluorescence quantum efficiency and good charge transport ability, and its emission spectrum is closer to the international standard dark blue, which is beneficial to realize a full-color display with higher color purity.

Description

technical field [0001] The invention relates to an organic electroluminescent device and belongs to the field of organic photoelectricity. Background technique [0002] As a new type of display technology, organic electroluminescent devices have the advantages of self-illumination, wide viewing angle, low energy consumption, high efficiency, thin thickness, rich colors, fast response speed, flexible and transparent light-emitting devices, etc. Luminescent device technology can be used in new flat panel displays, surface light source lighting and wearable devices, and can also be used as a backlight for LCDs. [0003] After years of development, organic electroluminescent device technology (OLED) has reached the market level. However, the high-efficiency phosphorescent materials widely used at present require the use of rare and precious metals such as iridium and platinum, and the cost is high, which is one of the important factors for the high cost of OLEDs. In order to r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/54C07D209/86C07C225/22C07D219/02C07D265/38C07D279/22C09K11/06
CPCC07C225/22C07D209/86C07D219/02C07D265/38C07D279/22C09K11/06C09K2211/1037C09K2211/1029C09K2211/1014C09K2211/1033H10K85/633H10K85/631H10K85/657H10K85/6572C07D267/18C07D279/36C07D209/82H10K50/11H10K50/15H10K50/16H10K50/17H10K50/18C09K2211/1018
Inventor 李哲鲁锦鸿戴雷蔡丽菲
Owner GUANGDONG AGLAIA OPTOELECTRONICS MATERIALS
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