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 on

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

Example Embodiment

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

[0151] 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 loaded into the 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 compound D-174 is doped in t...

Example

[0152] Comparative Examples 1-1 to 1-3: The preparation method is the same as that of Example 1-1, except that the host material of the light-emitting layer of Comparative Examples 1-1 to 1-3 in Table 1 is used, and the host material is The weight ratio of the dopant is adjusted to 80:20, which is the best ratio of the single-component host to the weight ratio of the dopant used.

Example

[0153] Comparative Examples 1-4 to 1-6: The preparation method is the same as that of Example 1-1, except that the host materials of the light-emitting layer of Comparative Examples 1-4 to 1-6 in Table 1 are used.

[0154] The detailed device layer structure and thickness are shown in Table 1. For layers with more than one kind of materials, different compounds are doped in the weight ratios described.

[0155] Table 1

[0156]

[0157]

[0158] The structure of some materials used in the device is as follows:

[0159]

[0160]

[0161] Table 2 lists the test results of Example 1-1 and Comparative Example 1-1 to Comparative Example 1-6. The color coordinates, peak wavelength and half-width in Table 2 are measured at a brightness of 1000 nits, and the voltage, external quantum efficiency, and current efficiency are measured at a current density of 15mA / cm 2 Measured below, the lifetime is the time required for the initial luminance of 10,000 nits to decay to 95% of the initial luminan...

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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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