Title:
LIGHT-EMITTING DEVICE, LIGHT-EMITTING APPARATUS, DISPLAY APPARATUS, ELECTRONIC EQUIPMENT, AND LIGHTING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2022/238804
Kind Code:
A1
Abstract:
Provided is a new light-emitting device that has excellent convenience, usefulness, and reliability. This light emitting device comprises a first electrode, a second electrode, a first unit, and a first layer. The first unit is sandwiched between the first electrode and the second electrode, and is provided with a second layer, a third layer, and a fourth layer. The second layer is sandwiched between the third layer and the fourth layer, and includes a luminescent material. The fourth layer is sandwiched between the second layer and the second electrode, and includes a first organic compound. The first organic compound comprises a π-electron deficient heteroaromatic ring skeleton and a π-electron rich heteroaromatic ring skeleton, and has a HOMO level in the range of -6.0 to -5.6 eV. The first layer is sandwiched between the first electrode and the first unit, is in contact with the first electrode, and includes a second organic compound and a third organic compound.
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Inventors:
HASHIMOTO NAOAKI (JP)
SEO SATOSHI (JP)
SUZUKI TSUNENORI (JP)
SEO HIROMI (JP)
SEO SATOSHI (JP)
SUZUKI TSUNENORI (JP)
SEO HIROMI (JP)
Application Number:
PCT/IB2022/053936
Publication Date:
November 17, 2022
Filing Date:
April 28, 2022
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
H05B33/12; G09F9/30; H01L27/32; H01L51/50
Foreign References:
| JP2013065842A | 2013-04-11 | |||
| JP2014086236A | 2014-05-12 | |||
| CN111554824A | 2020-08-18 |
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