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A compound, light-emitting layer guest material, organic electroluminescent device and display device

A compound and selected technology, which are applied in the fields of compounds, light-emitting layer guest materials, organic electroluminescent devices and display devices, can solve the problem of high evaporation temperature of materials, poor luminous efficiency and light stability, and restrict the display function and development of OLED display devices. and other problems, to achieve the effect of low evaporation temperature, excellent display effect and small molecular weight

Active Publication Date: 2022-04-05
BEIJING NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the luminous efficiency and light stability of the light-emitting layer guest materials currently used in OLEDs are poor, and the evaporation temperature of the materials is high, which restricts the display function and development of OLED display devices.

Method used

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  • A compound, light-emitting layer guest material, organic electroluminescent device and display device
  • A compound, light-emitting layer guest material, organic electroluminescent device and display device
  • A compound, light-emitting layer guest material, organic electroluminescent device and display device

Examples

Experimental program
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Effect test

Embodiment 1

[0200] A glass plate coated with a transparent conductive layer of indium tin oxide (ITO) with a thickness of 130 nm was ultrasonically treated in a commercial cleaning agent, rinsed in deionized water, ultrasonically degreased in acetone-ethanol mixed solvent, and baked in a clean environment. Baked until completely dehydrated, cleaned with UV light and ozone, and bombarded with a beam of low-energy cations;

[0201] Then, the above-mentioned glass substrate with the anode is placed in a vacuum chamber, and the vacuum is evacuated to less than 10 -5 torr, the hole injection layer is vacuum-evaporated on the above-mentioned anode layer film, the material of the hole injection layer includes the hole injection layer material HT-34 and the p-type dopant p-1, and the method of multi-source co-evaporation is used for evaporation Plating, adjust the evaporation rate of hole injection layer material HT-34 to be 0.1nm / s, the evaporation rate of p-type dopant p-1 is 3% of the evaporat...

Embodiment 2-13

[0209] Except that compounds G2, G3, G8, G9, G10, G12, G14, G19, G21, G22, G23, and G27 were used instead of G1, the rest were the same as in Example 1.

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Abstract

The present application provides a compound of general formula (I), which can be used in organic electroluminescent devices as a guest material for the light-emitting layer. The compound contains a structure in which a natural heterocycle is coordinated with iridium (Ir), and can effectively regulate the emission wavelength of the compound. Using it as the guest material of the light-emitting layer is beneficial to improving the light-emitting efficiency and photostability of the organic electroluminescent device. In addition, the compound provided by the present application has a small molecular weight, so when it is applied to the light-emitting layer, the evaporation temperature is relatively low, which is favorable for processing. The present application also provides a light-emitting layer guest material comprising the compound of general formula (I), an organic electroluminescence device and a display device.

Description

technical field [0001] The present application relates to the field of organic light-emitting display, in particular to a compound, a light-emitting layer guest material, an organic electroluminescent device and a display device. Background technique [0002] Organic electroluminescent display (hereinafter referred to as OLED) has a series of advantages such as self-luminescence, low-voltage DC drive, full curing, wide viewing angle, light weight, simple composition and process, etc. Compared with liquid crystal display, organic electroluminescent display is not It requires a backlight source, has a large viewing angle and low power, and its response speed can reach 1000 times that of a liquid crystal display, but its manufacturing cost is lower than that of a liquid crystal display with the same resolution. Therefore, organic electroluminescent devices have very broad application prospects. With the continuous advancement of OLED technology in the two major fields of light...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC07F15/0033C09K11/06C09K2211/185H10K85/342H10K50/11H10K2101/10H10K50/12
Inventor 陈雪波王储王娟娟陈跃方维海丰佩川
Owner BEIJING NORMAL UNIVERSITY