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Organic electroluminescent element and electronic device

An electroluminescent element, organic technology, applied in the direction of electrical components, organic semiconductor devices, luminescent materials, etc., can solve the problems of practical research in the ascendant

Inactive Publication Date: 2019-11-22
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, since organic EL elements can obtain various luminescent colors by using various luminescent materials in the luminescent layer, practical research for displays and the like is in the ascendant.

Method used

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  • Organic electroluminescent element and electronic device
  • Organic electroluminescent element and electronic device
  • Organic electroluminescent element and electronic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0827] Fabrication of organic EL elements

[0828] A 25 mm x 75 mm x 1.1 mm glass substrate (manufactured by Geomatec) with an ITO transparent electrode (anode) was ultrasonically cleaned in isopropanol for 5 minutes, and then UV ozone cleaning was performed for 30 minutes. The film thickness of ITO was 130 nm.

[0829] The above-mentioned glass substrate after cleaning was installed on the substrate holder of the vacuum evaporation device, and the compound HI-1 was first evaporated on the side where the transparent electrode was formed to cover the transparent electrode to form a hole injection layer with a film thickness of 5 nm. .

[0830] Compound HT-1 was vapor-deposited on this hole injection layer to form a first hole transport layer with a film thickness of 80 nm.

[0831] Next, the compound HT-2 was vapor-deposited on the first hole transport layer to form a second hole transport layer with a film thickness of 10 nm.

[0832] Then, compound BH1-1 (first compound), ...

Embodiment 2～13 and comparative example 1～10

[0846] Each organic EL device containing the first compound shown in Table 1, the second compound, and the dopant material in the mass ratio shown in Table 1 was fabricated and evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0847] Materials used in Examples 1 to 13 and Comparative Examples 1 to 10 are shown below.

[0848] Hole injection layer, hole transport layer material

[0849] [chem 156]

[0850]

[0851] electron transport layer material

[0852] [chem 157]

[0853]

[0854] Dopant material

[0855] [chem 158]

[0856]

[0857] first compound

[0858] [chem 159]

[0859]

[0860] second compound

[0861] [chem 160]

[0862]

[0863] [Table 1]

[0864]

[0865] Compared with the single-host organic EL elements comprising the first compound and the dopant material of Comparative Examples 1-10, the co-host organic components comprising the second compound in addition to the first compound and the dopant materia...

Embodiment 14～20 and comparative example 11～13

[0868] Each organic EL element containing the first compound shown in Table 1, the second compound, and the dopant material in the mass ratio shown in Table 2 was fabricated and evaluated in the same manner as in Example 1. The results are shown in Table 2.

[0869] Materials used in Examples 14 to 20 and Comparative Examples 11 to 13 are shown below.

[0870] Dopant material

[0871] [chem 161]

[0872]

[0873] second compound

[0874] [chem 162]

[0875]

[0876] [Table 2]

[0877]

[0878] Compared with the single-host organic EL elements comprising the first compound and the dopant material of Comparative Examples 11-13, the co-host organic components comprising the second compound in addition to the first compound and the dopant material of Examples 14-20 The EL element has a long life. That is, when comparing organic EL elements under the same conditions except for the presence or absence of the second compound, the EL element of the present invention has...

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Abstract

Provided is an organic EL element with a superior lifespan and an electronic device provided with the organic EL element. The organic electroluminescent element comprises a negative electrode, a positive electrode, and an organic layer between the negative electrode and the positive electrode, wherein the organic layer contains a fluorescent light-emitting layer, and the fluorescent light-emittinglayer comprises one or more dopants selected from the compounds represented by formulas (D1) and (D2), one or more first compounds selected from the compounds represented by formulas (19), (21), (22), and (23), and one or more second compounds selected from the compounds represented by formulas (2a), (2b), and (2c).

Description

technical field [0001] The present invention relates to organic electroluminescent elements and electronic equipment. Background technique [0002] Generally, an organic electroluminescence (hereinafter, "electroluminescence" may be abbreviated as EL) element is composed of an anode, a cathode, and one or more organic thin film layers interposed between the anode and the cathode. If a voltage is applied between the two electrodes, electrons are injected from the cathode side to the light-emitting region, and holes are injected from the anode side to the light-emitting region. The injected electrons and holes recombine in the light-emitting region to generate an excited state, and the excited state returns to the ground state. emit light. [0003] In addition, since organic EL elements can obtain various light-emitting colors by using various light-emitting materials in the light-emitting layer, practical research for displays and the like is in the ascendant. For example, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50C07D487/06C09K11/06
CPCC07D487/06C09K11/06H10K85/615H10K85/631H10K85/626H10K85/6572H10K85/6574H10K50/11H10K2101/90H10K85/658C09K2211/1029H10K85/322H10K85/622H10K85/656
Inventor 田崎聪美高桥良多中野裕基河村祐一郎
Owner IDEMITSU KOSAN CO LTD
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