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Light-emitting element, light-emitting device, electronic device, lighting device, and organic compound

專利號
US11800799B2
公開日期
2023-10-24
申請人
Semiconductor Energy Laboratory Co., Ltd.
發(fā)明人
Satoshi Seo; Takao Hamada; Tatsuyoshi Takahashi; Yasushi Kitano; Hiroki Suzuki; Hideko Inoue
IPC分類
H10K85/60; C07D403/14; H10K85/30
技術(shù)領(lǐng)域
emitting,light,2mpcczpdbq,2pcczpdbq,element,compound,in,dibenzo,layer,nm
地域： Kanagawa-ken

摘要

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.

說明書

In the formula, A represents a dibenzo[f,h]quinoxalinyl group; R1 to R15 represent independently hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having 5 to 7 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms; and Ar represents a substituted or unsubstituted arylene group having 6 to 25 carbon atoms or a single bond. Preferably, an arylene group in Ar does not include an anthracenylene group.

Another embodiment of the present invention is an organic compound represented by the following general formula (G0).

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In the formula, A represents a dibenzo[f,h]quinoxalinyl group; R1 to R15 represent independently hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having 5 to 7 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms; and Ar represents a substituted or unsubstituted arylene group having 6 to 25 carbon atoms or a single bond. Preferably, an arylene group in Ar does not include an anthracenylene group.

Another embodiment of the present invention is an organic compound represented by the following general formula (G1).

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權(quán)利要求

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