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Composition for organic electroluminescent element, organic thin film, organic electroluminescent element, organic el display device, and organic el lighting

An electroluminescence, organic field technology, applied in organic EL display devices, organic EL lighting. It can solve problems such as the inability to obtain the life of the components, and achieve the effects of uniform organic layer, long-life driving voltage, and excellent film quality.

Inactive Publication Date: 2011-06-29
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, with the technology of this patent document 1, although the solubility of the material has been improved, the obtained element still cannot obtain a sufficient life.

Method used

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  • Composition for organic electroluminescent element, organic thin film, organic electroluminescent element, organic el display device, and organic el lighting
  • Composition for organic electroluminescent element, organic thin film, organic electroluminescent element, organic el display device, and organic el lighting
  • Composition for organic electroluminescent element, organic thin film, organic electroluminescent element, organic el display device, and organic el lighting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0459] made figure 1 The organic electroluminescent element shown.

[0460] The anode 2 was formed by patterning a 150 nm-thick indium tin oxide (ITO) transparent conductive film (sputtered film product, sheet resistance 15Ω) formed on a glass substrate into 2 mm-wide stripes using a common photolithography technique. The substrate 1 on which the anode 2 is formed is sequentially subjected to ultrasonic cleaning with acetone, water washing with pure water, and ultrasonic cleaning with isopropanol, then drying with a nitrogen stream, and finally UV ozone cleaning.

[0461] A hole injection layer 3 was formed on the processed substrate as follows.

[0462] As a hole-injecting material, an electron-accepting material having the structure shown below containing aromatic amine-based polymer compound PB-1 (weight-average molecular weight: 29400, number-average molecular weight: 12600) having the following repeating structure was prepared. A positive compound PI-1, and a compositio...

Embodiment 2

[0502] Except that the polymer compound used in the composition for forming a hole transport layer was changed from polymer compound HT-1 to polymer compound HT-2 (weight average molecular weight: 38000, number average molecular weight: 18000), using the light-emitting material (compound D-2) shown in the following structure instead of the light-emitting material (compound D-1) contained in the composition for organic electroluminescent elements used when forming the light-emitting layer 5, and causing light emission The weight ratio of the material (compound D-2) to the charge transport material (compound E-1) is (compound D-2): (compound E-1) = 1: 10, according to the same method as in Example 1 to obtain Organic electroluminescent elements.

[0503] [chemical formula 23]

[0504]

[0505] In addition, the saturation solubility of compound D-2 with respect to cyclohexylbenzene at 20° C. and 1 atmosphere pressure was 2.5 wt %.

[0506] In addition, compound E-1 is the or...

Embodiment 3

[0512] In addition to using the charge transport material (compound E-2) shown in the following structure instead of the charge transport material (compound E-1) contained in the composition for organic electroluminescent elements used when forming the light emitting layer 5, and making the light emitting material The weight ratio of (compound D-2) to charge transport material (compound E-2) is (compound D-2): (compound E-2) = 1: 10, according to the same method as in Example 2 to obtain effective Electroluminescent elements.

[0513] [chemical formula 24]

[0514]

[0515] In addition, since compound E-2 has a solubility of 1.2 wt% relative to cyclohexylbenzene at 20°C and 1 atmosphere, it is difficult to prepare a solution with a concentration of 2.3 wt% at room temperature. Therefore, compound D-2, Compound E-2 and cyclohexylbenzene were mixed, then heated on a hot plate set at 80° C. to dissolve Compound E-2, and used before re-precipitating crystals.

[0516] In addi...

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Abstract

Provided is a long-life organic electroluminescent element that has a light-emitting layer formed with a wet film-forming method. The composition for the organic electroluminescent element contains two or more types of organic electroluminescent materials that contain a light-emitting material and a solvent, and satisfies formula (1): (EL material (S) is the organic electroluminescent element material with the lowest weight in the composition. EL material (N) is the organic electroluminescent element material with the greatest weight. The weight ratio is the weight ratio between the EL material (S) and the EL material (N). Saturation solubility is the saturation solubility of the pertinent material for the solvent in the composition at 20 DEG C and 1 atmosphere pressure).

Description

technical field [0001] The present invention relates to a composition for an organic electroluminescent element, which is used for forming a light-emitting layer of an organic electroluminescent element by a wet film-forming method. [0002] In addition, the present invention also relates to an organic electroluminescent element using the composition for an organic electroluminescent element, an organic EL display device and an organic EL lighting using the organic electroluminescent element. Background technique [0003] In recent years, the development of organic electroluminescent (organic EL) elements has been widely developed as a technology for manufacturing light-emitting devices such as displays and lighting, and practical use has begun mainly for small to medium-sized displays. [0004] An organic electroluminescence element is an element that realizes light emission by injecting positive and negative charges (carriers) into an organic layer between electrodes and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50C09K11/06H05B33/10
CPCH01L51/0059H01L51/008H01L51/0007H01L51/0087C09B57/00H05B33/10H01L51/5012C09B57/001H01L51/006H01L51/0085H01L51/0058H01L51/0039H10K71/15H10K85/115H10K85/626H10K85/633H10K85/631H10K85/322H10K85/346H10K85/342H10K50/11C09K11/06
Inventor 高桥敦史冈本英明
Owner MITSUBISHI CHEM CORP
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