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Organic compound, light-emitting element, light-emitting device, electronic device, and lighting device

專利號
US10868258B2
公開日期
2020-12-15
申請人
Semiconductor Energy Laboratory Co., Ltd.
發(fā)明人
Miki Kurihara; Hideko Yoshizumi; Hiromitsu Kido; Tatsuyoshi Takahashi; Satoshi Seo
IPC分類
H01L51/50; H01L51/00; C07D491/048; C07D495/04
技術(shù)領(lǐng)域
emitting,light,skeleton,8cz,layer,compound,in,phenyl,material,electron
地域： Kanagawa-ken

摘要

A novel organic compound is provided. Moreover, a light-emitting element with high emission efficiency and a long lifetime is provided. A novel organic compound having a bicarbazole skeleton and a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton that includes at least one condensed ring or two condensed rings is provided. Moreover, a light-emitting element including the organic compound is provided.

說明書

Both energies of SPE and TPE of the exciplex are then transferred to the T1 level of the light-emitting material 122 (the phosphorescent compound); thus, light emission is obtained (see Routes E4 and E5 in FIG. 3C).

Furthermore, the T1 level (TPE) of the exciplex is preferably higher than the T1 level (TPG) of the light-emitting material 122 and lower than or equal to the T1 levels (TPH1 and TPH2) of the organic compounds (the organic compound 121_1 and the organic compound 121_2) which form the exciplex. In this way, the singlet excitation energy and the triplet excitation energy of the formed exciplex can be efficiently transferred from the S1 level (SPE) and the T1 level (TPE) of the exciplex to the T1 level (TPG) of the light-emitting material 122.

In order to efficiently form an exciplex by the organic compound 121_1 and the organic compound 121_2, it is preferable to satisfy the following: the HOMO level of one of the organic compound 121_1 and the organic compound 121_2 is higher than that of the other and the LUMO level of the one of the organic compound 121_1 and the organic compound 121_2 is higher than that of the other.

權(quán)利要求

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