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Organic electroluminescent device comprising dopant material and plurality of host materials

A technology of electroluminescent devices and host materials, which is applied in the direction of organic semiconductor devices, electric solid devices, semiconductor devices, etc., can solve problems such as unattended coordination, and achieve the effect of improving performance and improving lifespan

Pending Publication Date: 2020-06-30
BEIJING SUMMER SPROUT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application discloses a metal complex as a light-emitting dopant. Although it is mentioned that the dopant can be used together with one or more existing host materials, it only lists a series of existing host materials. material, the application does not pay attention to the coordination of the dopant with various host materials of specific structure

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
Comparison scheme
Effect test

Embodiment 1-1

[0150] Example 1-1: Preparation of an organic electroluminescent device comprising the material combination of the present invention.

[0151] First, a glass substrate with an 80 nm thick indium tin oxide (ITO) anode was cleaned and then treated with UV ozone and oxygen plasma. After processing, the substrate was dried in a nitrogen-filled glove box to remove moisture, and then mounted on a substrate holder and loaded into a vacuum chamber. The organic layer specified below, at a vacuum of about 10 -8 In the case of Torr, the evaporation is sequentially carried out on the ITO anode by thermal vacuum at a rate of 0.2-2 angstroms / second. Compound HI was used as a hole injection layer (HIL) with a thickness of 100 angstroms. Compound HT was used as a hole transport layer (HTL) with a thickness of 350 angstroms. Compound H-25 was used as an electron blocking layer (EBL) with a thickness of 50 Angstroms. Then compound D-174 is doped in the first host compound H-25 and the secon...

Embodiment 2-1

[0165] Example 2-1: The same preparation method as Example 1-1, except that the dopant compound D-125 used as the dopant compound in the light-emitting layer accounts for 8% of the total weight of the light-emitting layer .

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Abstract

The invention discloses an organic electroluminescent device comprising a dopant material and a plurality of host materials. A light emitting layer of the device includes two host materials having specific structures and a dopant material. Appropriate energy level matching can be obtained by selecting the combination of the specific main body material and the specific doping agent material, the concentration of carriers in the light-emitting layer is effectively regulated and controlled to reach expected balance. Compared with the prior art, the organic electroluminescent device enables the comprehensive performance of the organic light-emitting device to be obviously improved. A display assembly and a compound formulation are also disclosed.

Description

technical field [0001] The invention relates to an organic electroluminescent device. More particularly, it relates to organic electroluminescent devices comprising dopant materials and various 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 plasmonic light-emitting devices. [0003] Organic light-emitting devices have advantages such as wide angle, high contrast ratio and faster response time. Tang and Van Slyke of Eastman Kodak Company reported an organic light-emitting device in 1987, arylamine hole transport layer and three-8-...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K85/624H10K85/6572H10K50/11H10K71/00C09K11/06C07D209/86C07D405/14H10K85/631H10K85/654H10K85/6574H10K85/342H10K2101/10H10K2101/90Y02E10/549C09K2211/185C07F15/0033C09K2211/1018C09K2211/1048C09K2211/1029
Inventor 高亮夏传军邝志远庞惠卿
Owner BEIJING SUMMER SPROUT TECH CO LTD
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