Amine compound and organic electroluminescent element employing the same

An amine compound and electromechanical technology, applied in the field of amine compounds and organic electroluminescent elements, can solve the problems of insufficient heat resistance and low glass transition temperature, and achieve high heat resistance, large band gap energy, Effect of Good Luminance/Voltage Characteristics

Inactive Publication Date: 2008-12-03
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In addition, Patent Document 5 describes a light-emitting material for an organic EL device composed of a compound having a quinoxaline skeleton, but the glass transition temperature is low and the heat resistance is insufficient.

Method used

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  • Amine compound and organic electroluminescent element employing the same
  • Amine compound and organic electroluminescent element employing the same
  • Amine compound and organic electroluminescent element employing the same

Examples

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Embodiment 1

[0292] A 25 mm x 75 mm x 1.1 mm thick glass substrate with an ITO transparent electrode (manufactured by GEOMATEC) was ultrasonically cleaned in isopropanol for 5 minutes, followed by UV ozone cleaning for 30 minutes. The cleaned glass substrate with transparent electrode lines was installed on the substrate holder of the vacuum evaporation device. First, a compound 1 film with a film thickness of 60 nm was formed on the surface of the side where the transparent electrode lines were formed, and covered. the transparent electrode. This Compound 1 film functions as a hole injection layer. Next, an N,N,N',N'-tetrakis(4-biphenylyl)-4,4'-benzidine film (BPTPD film) was formed to a film thickness of 20 nm on the Compound 1 film. The BPTPD film functions as a hole transport layer. Further, on this BPTPD film, the following compound A and dopant compound B were co-deposited with a film thickness of 40 nm at a deposition rate ratio of 40:2. This film functions as a light emitting la...

Embodiment 2

[0297] In Example 1, a device was fabricated in the same manner except that Compound 2 was used instead of Compound 1. Evaluation of the obtained organic EL element showed that the luminous efficiency was 9.1cd / A, and the initial luminance was 1000cd / m 2 The brightness half-life time is more than 500 hours. In addition, the maximum emission wavelength is 473nm.

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Abstract

The present invention provides an organic electroluminescence device which: brings physical properties, that is, a low ionization potential, large band gap energy, high injection efficiency, and a high mobility into balance in an excellent manner; has high heat resistance; and shows high current efficiency and a long lifetime while maintaining good luminance / voltage characteristics and good current density / voltage characteristics, and a novel amine-based compound for realizing the device. The amine-based compound is of a specific structure containing a quinoxaline ring. The organic electroluminescence device includes an organic thin film layer composed of one or more layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode. In the organic electroluminescence device, at least one layer of the organic thin film layer contains the amine-based compound alone or as a component of a mixture.

Description

technical field [0001] The present invention relates to an amine compound and an organic electroluminescence device using the same, more specifically, to an organic electroluminescence device having high heat resistance, maintaining good brightness / voltage characteristics, current density / voltage characteristics, and simultaneously having high luminous efficiency, A long-life organic electroluminescent device and an amine compound for realizing it. Background technique [0002] An organic electroluminescent element (EL) is a self-luminous element utilizing the principle that a fluorescent substance emits light by applying an electric field to utilize the recombination energy of holes injected from the anode and electrons injected from the cathode. Therefore, it has high visibility due to self-illumination, and it is a completely solid element, so it has the advantages of excellent impact resistance, etc., and is attracting attention as a light-emitting element in various dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D241/42C09K11/06H01L51/50
CPCC09K2211/1011H01L51/5012H01L51/0059C09K2211/1007H05B33/14C09K11/06C07D241/38C09K2211/1014H01L51/0072H01L51/0058H01L51/0081H01L51/5088H10K85/631H10K85/626H10K85/324H10K85/6572H10K50/17H10K50/11H10K85/615
Inventor 井上哲也渡边正美近藤浩史
Owner IDEMITSU KOSAN CO LTD
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