Title:
発光素子、発光装置、電子機器、及び照明装置
Document Type and Number:
Japanese Patent JP7423728
Kind Code:
B2
Abstract:
To provide a light-emitting element with an improved reliability, a light-emitting element with a high current efficiency (or a high quantum efficiency), and a novel dibenzo[f,h]quinoxaline derivative that is favorably used in a light-emitting element which is one embodiment of the present invention. A light-emitting element includes an EL layer between an anode and a cathode. The EL layer includes a light-emitting layer; the light-emitting layer contains a first organic compound having an electron-transport property and a hole-transport property, a second organic compound having a hole-transport property, and a light-emitting substance; the combination of the first organic compound and the second organic compound forms an exciplex; the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound; and a difference between the HOMO level of the first organic compound and the HOMO level of the second organic compound is less than or equal to 0.4 eV.
Inventors:
Satoshi Seo
Takao Hamada
Tatsuyoshi Takahashi
Yasushi Kitano
Hiroki Suzuki
Eiko Yoshizumi
Takao Hamada
Tatsuyoshi Takahashi
Yasushi Kitano
Hiroki Suzuki
Eiko Yoshizumi
Application Number:
JP2022172105A
Publication Date:
January 29, 2024
Filing Date:
October 27, 2022
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
H10K50/12; H10K85/60
Domestic Patent References:
| JP2013065842A | ||||
| JP2012227524A | ||||
| JP2008053556A |
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