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Multi-component host material and organic electroluminescent device comprising same

An electroluminescent device, multi-component technology, used in organic semiconductor devices, electro-solid devices, semiconductor devices, etc.

Pending Publication Date: 2022-05-13
ROHM & HAAS ELECTRONICS MATERIALS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, said reference does not disclose the use of compounds in which biscarbazole containing an aryl group is linked directly or via an arylene group to dibenzothiophene or dibenzofuran, and in which a carbazole is linked directly or via an arylene group to a heteroaryl Group-linked compounds as multicomponent hosts for organic electroluminescent devices

Method used

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  • Multi-component host material and organic electroluminescent device comprising same
  • Multi-component host material and organic electroluminescent device comprising same
  • Multi-component host material and organic electroluminescent device comprising same

Examples

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example 1-1

[0090] Device Example 1-1: Preparation by co-evaporation of the first host compound and the second host compound of the present invention OLED device

[0091] OLED devices are produced using the organic electroluminescent compounds according to the invention. Transparent electrode indium tin oxide (ITO) films (10 Ω / sq) on glass substrates for organic light-emitting diode (OLED) devices (Geomatec) were ultrasonically washed with trichloroethylene, acetone, ethanol, and distilled water in sequence, and then Store in isopropanol. The ITO substrate was then mounted on the substrate holder of the vacuum vapor deposition equipment. Will N 4 ,N 4 '-Diphenyl-N 4 ,N 4 '-bis(9-phenyl-9H-carbazol-3-yl)-[1,1'-biphenyl]-4,4'-diamine (compound HI-1) introduced into the vacuum vapor deposition equipment unit, and then control the pressure in the chamber of the device to 10 -6 support. Thereafter, a current was applied to the cell to evaporate the above introduced material, thereby...

example 4-1

[0105] Device Example 4-1: Preparation of OLED by co-evaporation of the first host compound and the second host compound of the present invention device

[0106] In addition to evaporating a 10-nm-thick first hole-transporting layer, a 30-nm-thick second hole-transporting layer was evaporated by using compound HT-3, and compound D-136 was used as the dopant for the emitting layer, and using the compounds listed in Table 2. OLED devices were produced in the same manner as in Device Examples 3-1 to 3-13 except that the first and second host compounds were combined as hosts of the light emitting layer.

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Abstract

The invention relates to a multi-component host material and an organic electroluminescent device comprising the same. By comprising a specific combination of multi-component host compounds, the organic electroluminescent device according to the present invention can provide high luminous efficiency and excellent lifespan characteristics.

Description

technical field [0001] The present invention relates to multicomponent host materials and organic electroluminescent devices comprising said multicomponent host materials. Background technique [0002] An electroluminescent device (EL device) is a self-luminous device that has the advantage of providing a wider viewing angle, greater contrast and faster response time. The first organic EL device was developed by Eastman Kodak by using small aromatic diamine molecules and aluminum complexes as materials for forming a light emitting layer [Appl. Phys. Lett. 51, 913, 1987]. [0003] An organic EL device (OLED) is a device that changes electron energy into light by applying electricity to an organic electroluminescence material, and generally has a structure including an anode, a cathode, and an organic layer between the anode and the cathode. The organic layer of an organic EL device can be composed of a hole injection layer, a hole transport layer, an electron blocking layer,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/54H01L51/50
CPCC09K11/06C07D405/14C09K2211/1007C09K2211/1011C09K2211/1029C09K2211/1044C09K2211/1059C09K2211/1088C09K2211/1092C07D403/04C07D403/10C07D403/14C07D409/14C07D487/04C07D491/048C07D495/04H10K85/654H10K85/6576H10K85/6572H10K85/342H10K50/11H10K2101/10H10K2101/90H10K85/6574H10K85/40C09K2211/1037C09K2211/1062C09K2211/1066
Inventor 金侈植李仙優李琇炫金荣光安熙春沈载勋朴景泰金南均崔庆勳赵英俊
Owner ROHM & HAAS ELECTRONICS MATERIALS LLC