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Organic electroluminescent device comprising dopant material and plurality of host materials

A technology for electroluminescent devices and host materials, which is applied in the fields of electro-solid devices, semiconductor devices, and semiconductor/solid-state device manufacturing, etc., can solve problems such as comprehensive performance needs to be improved, and achieve the effect of improving performance and improving spectrum.

Active Publication Date: 2020-05-29
BEIJING SUMMER SPROUT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The overall performance of devices implemented with specific materials also needs to be improved

Method used

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  • Organic electroluminescent device comprising dopant material and plurality of host materials
  • Organic electroluminescent device comprising dopant material and plurality of host materials
  • Organic electroluminescent device comprising dopant material and plurality of host materials

Examples

Experimental program
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Embodiment 1-1

[0126] Example 1-1: Preparation of an organic electroluminescent device containing the material combination of the present invention.

[0127] First, the glass substrate, which has an 80nm thick indium tin oxide (ITO) anode, is cleaned, and then treated with UV ozone and oxygen plasma. After processing, the substrate is dried in a glove box filled with nitrogen to remove moisture, and then the substrate is mounted on the substrate holder and put into a vacuum chamber. The organic layer specified below, the vacuum degree is about 10 -8 In the case of Torr, vapor deposition is sequentially performed on the ITO anode through thermal vacuum at a rate of 0.2-2 angstroms / sec. The compound HI is used as a hole injection layer (HIL) with a thickness of 100 angstroms. The compound HT is used as a hole transport layer (HTL) with a thickness of 350 angstroms. Compound H-25 is used as an electron blocking layer (EBL) with a thickness of 50 angstroms. Then the dopant compound D-1 is doped ...

Embodiment 1-2 to 1-4

[0129] Examples 1-2 to 1-4: Preparation of organic electroluminescent devices comprising the material combination of the present invention.

[0130] The preparation method is the same as that of Example 1-1, except that the first host compound and the second host compound used in the light-emitting layer are different, specifically: Example 1-2 First host uses compound H-7 , The second host uses compound E-6; Example 1-3 uses compound H-7 for the first host, and uses compound E-1 for the second host; Example 1-4 uses compound H-25 for the first host, and the second host Use compound E-6.

Embodiment 2-1 to 2-4

[0143] Examples 2-1 to 2-4: Preparation of organic electroluminescent devices containing another material combination of the present invention as a light-emitting layer.

[0144] Preparation methods of Example 2-1 and Example 1-1, Example 2-2 and Example 1-2, Example 2-3 and Example 1-3, Example 2-4 and Example 1-4 In comparison, the only difference is that Examples 2-1 to 2-4 all use the dopant compound D-4 instead of the dopant compound D-1 used in Examples 1-1 to 1-4.

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Abstract

The invention discloses an organic electroluminescent device comprising a dopant material and a plurality of host materials. The light emitting layer of the device includes two host materials of a specific structure and a dopant material. By selecting a special combination of the host compounds and the dopant compound, the proper energy level matching of the material of a luminescent layer can beobtained, the concentration of carriers in the luminescent layer can be effectively regulated and controlled to reach expected balance. Compared with the prior art, the organic electroluminescent device has obviously improved performance, for example, the spectrum, voltage, luminous efficiency, service life and the like. A display assembly and a compound formulation are also disclosed.

Description

Technical field [0001] The invention relates to an organic electroluminescence device. More particularly, it relates to an organic electroluminescence device containing a dopant material and a variety of host materials. Background technique [0002] Organic electronic devices include but are not limited to the following categories: organic light-emitting devices (OLEDs), organic field effect transistors (O-FETs), organic light-emitting transistors (OLETs), organic photovoltaic devices (OPVs), dye-sensitized solar cells (DSSCs) , Organic optical detectors, organic photoreceptors, organic field effect devices (OFQDs), light-emitting electrochemical cells (LECs), organic laser diodes and organic plasma light-emitting devices. [0003] Organic light-emitting devices have the advantages of wide angle, high contrast, and faster response time. Tang and Van Slyke of Eastman Kodak Company reported in 1987 an organic light-emitting device with an arylamine hole transport layer and a tri-8-...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54C09K11/06
CPCC09K11/06C09K2211/1029C09K2211/1007C09K2211/1011C09K2211/1059C09K2211/185H10K85/626H10K85/615H10K85/6572H10K85/342H10K50/12Y02E10/549
Inventor 高亮夏传军邝志远庞惠卿
Owner BEIJING SUMMER SPROUT TECH CO LTD