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Organic electroluminescence device

An electroluminescent device and a luminescent technology, which are applied in the direction of luminescent materials, organic chemistry, organic semiconductor devices, etc., and can solve problems that have not been specifically disclosed

Pending Publication Date: 2019-05-24
ROHM & HAAS ELECTRONICS MATERIALS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the aforementioned documents do not specifically disclose the use of spirobifluorenes substituted with diarylamines as hole transport materials and nitrogen-containing heteroaryls as one of two carbazoles in which the benzene ring is fused into a biscarbazole structure. Organic electroluminescent device with a compound that is bonded to one of the two nitrogen atoms as a host material

Method used

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Examples

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example 1

[0124] [Device Example 1] Production of an OLED device comprising a combination of a hole transport material and a host compound according to the present disclosure

[0125] OLED devices were prepared comprising combinations of hole transport materials and host compounds of the present disclosure. The transparent electrode indium tin oxide (ITO) thin film (10Ω / sq) on the glass substrate used for the OLED device (Geomatec Co..LTD., Japan) was sequentially treated with acetone, ethanol and distilled water. Sonicated and then stored in isopropanol. The ITO substrate was then mounted on the substrate holder of the vacuum vapor deposition equipment. Compound HI-1 was introduced into the unit of the vacuum vapor deposition equipment, and then the pressure in the chamber of the equipment was controlled to 10 by air venting. -6 support. Thereafter, a current was applied to the cell to evaporate the above introduced material, thereby forming a first hole injection layer with a thick...

example 2

[0127] [Device Example 2] Production of an OLED device comprising a combination of a hole transport material and a host compound according to the present disclosure

[0128] An OLED device was produced in the same manner as in Device Example 1 except that C-7 was used as the second hole transport material.

[0129] As a result, the minimum time required for brightness to drop from 100% to 97% at 5,000nit is 258 hours.

example 3

[0130] [Device Example 3] Production of an OLED device comprising a combination of a hole transport material and a host compound according to the present disclosure

[0131] An OLED device was produced in the same manner as in Device Example 1 except that C-58 was used as the second hole transport material.

[0132] As a result, the minimum time required for brightness to drop from 100% to 97% at 5,000nit is 221 hours

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Abstract

The present disclosure relates to an organic electroluminescence device. The organic electroluminescence device of the present disclosure comprises a specific combination of a host compound and a holetransport material which can provide excellent lifespan characteristics.

Description

technical field [0001] The present disclosure relates to an organic electroluminescent device. Background technique [0002] Electroluminescent devices (EL devices) are self-luminous devices that have the advantage of providing wider viewing angles, greater contrast ratios, and faster response times. The first organic EL device was developed by Eastman Kodak in 1987 by using low-molecular aromatic diamines and aluminum complexes as materials for forming the light-emitting layer (see "Appl. Phys. Lett." 51,913, 1987) developed. [0003] An organic electroluminescent device (OLED) converts electrical energy into light by injecting charges into an organic light emitting material, and generally includes an anode, a cathode, and an intermediate layer formed between the two electrodes. The intermediate layer of the organic electroluminescent device can be composed of a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, an electron b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07D403/02C07D403/14C07C211/44H01L51/54
CPCC07D403/14C09K11/06H10K85/633H10K85/342H10K85/6572H10K50/11H10K2101/10H10K50/156H10K85/624H10K50/12H10K50/15C09K2211/1018C07C2603/97C09K2211/1007C09K2211/1011C09K2211/1014C07C2603/18C07C211/61H10K85/626H10K2101/90
Inventor D-H·李李泰珍金宾瑞
Owner ROHM & HAAS ELECTRONICS MATERIALS LLC
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