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Organic electroluminescence element and electronic apparatus

An electroluminescent element and electroluminescent technology, applied in electrical components, organic semiconductor devices, organic chemistry, etc., can solve problems such as practical research in the ascendant, and achieve the effect of excellent life expectancy

Active 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 electroluminescence element and electronic apparatus
  • Organic electroluminescence element and electronic apparatus
  • Organic electroluminescence element and electronic apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0847] Fabrication of organic EL elements

[0848] 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.

[0849] 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. .

[0850] 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.

[0851] 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.

[0852] Then, compound BH1-1 (first compound), ...

Embodiment 2～14 and comparative example 1～10

[0866] 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.

[0867] Materials used in Examples 1 to 14 and Comparative Examples 1 to 10 are shown below.

[0868] Hole injection layer, hole transport layer material

[0869] [chem 158]

[0870]

[0871] electron transport layer material

[0872] [chem 159]

[0873]

[0874] Dopant material

[0875] [chem 160]

[0876]

[0877] first compound

[0878] [chem 161]

[0879]

[0880] [chem 162]

[0881]

[0882] second compound

[0883] [chem 163]

[0884]

[0885] [Table 1]

[0886]

[0887] Compared with the single-host organic EL elements comprising the first compound and the dopant material of Comparative Examples 1-10, Examples 1-14 contained, in addition to the first compound and the dopant material, a...

Embodiment 15

[0890] 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.

[0891] 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. .

[0892] Compound HT-1 was vapor-deposited on the hole injection layer to form a first hole transport layer with a film thickness of 80 nm.

[0893] 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.

[0894] Then, compound BH1-2 (first compound), compound BH3-1 (third compound) and compound B...

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Abstract

Provided are the following organic electroluminescence elements which exhibit an outstanding performance: an organic electroluminescence element comprising a negative electrode, a positive electrode,and an organic layer between the negative electrode and the positive electrode, in which the organic layer includes a fluorescence-emitting layer, and the fluorescence-emitting layer comprises a firstcompound, a second compound with a hole mobility greater than that of the first compound, and a dopant material with a fluorescence spectrum half-width of 30 nm or less; and an organic electroluminescence element comprising a negative electrode, a positive electrode, and an organic layer between the negative electrode and the positive electrode, in which the organic layer includes a fluorescence-emitting layer, the fluorescence-emitting layer comprises a first compound, a third compound having a greater affinity than the first compound, and a dopant material with a fluorescence spectrum half-width of 30 nm or less, and the quantity of the third compound in the fluorescence-emitting layer is less than the quantity of the first compound in the fluorescence-emitting layer.

Description

technical field [0001] The present invention relates to organic electroluminescent elements and electronic equipment. Background technique [0002] In general, an organic electroluminescent element (hereinafter sometimes abbreviated as "organic 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, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50C09K11/06C07D487/04
CPCH10K85/622H10K85/615H10K85/626H10K85/6574H10K85/6572H10K50/11C07D487/04C09K11/06C07D487/06C07D487/22H10K85/636H10K2101/90C09K2211/1029C09K2211/1088C09K2211/1018H10K50/121H10K2101/10
Inventor 田崎聪美西村和树中野裕基
Owner IDEMITSU KOSAN CO LTD