Title:
LIGHT-EMITTING DEVICE, LIGHT-EMITTING APPARATUS, ELECTRONIC DEVICE, AND LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/186306
Kind Code:
A1
Abstract:
Provided is a light-emitting device having a favorable lifespan. Alternatively, a light-emitting device having a low drive voltage is provided. Provided is a light-emitting device in which an electron transport layer has an organometallic complex of an alkali metal, and an organic compound having electron transport properties, wherein the organometallic complex and the organic compound are combined to form an excitation complex, and the energy conversion value (eV) of the peak wavelength in the emission spectrum of the excitation complex formed when the mass ratio of the organometallic complex and the organic compound is 1:1 is smaller, by at least 0.1 eV, than the difference (eV) between the HOMO level of the organometallic complex and the LUMO level of the organic compound.
Inventors:
KAWAKAMI SACHIKO (JP)
HASHIMOTO NAOAKI (JP)
SEO SATOSHI (JP)
HASHIMOTO NAOAKI (JP)
SEO SATOSHI (JP)
Application Number:
PCT/IB2021/052064
Publication Date:
September 23, 2021
Filing Date:
March 12, 2021
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
H01L51/50
Domestic Patent References:
| WO2018139662A1 | 2018-08-02 | |||
| WO2019146519A1 | 2019-08-01 | |||
| WO2019176971A1 | 2019-09-19 |
Foreign References:
| KR20180099547A | 2018-09-05 | |||
| CN110838549A | 2020-02-25 | |||
| JP2013251480A | 2013-12-12 | |||
| JP2020198280A | 2020-12-10 | |||
| JP2020167411A | 2020-10-08 |
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