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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

The light-emitting layer 120 included in the light-emitting unit 110 includes a host material 121 and a light-emitting material 122 as illustrated in FIG. 3B. The host material 121 includes an organic compound 121_1 and an organic compound 121_2. In the following description, the light-emitting material 122 included in the light-emitting layer 120 is a phosphorescent compound.

<<Light Emission Mechanism of Light-Emitting Layer 120>>

Next, the light emission mechanism and the material composition of the light-emitting layer 120 are described below.

The organic compound 121_1 and the organic compound 121_2 which are included in the light-emitting layer 120 preferably form an exciplex.

Although it is acceptable as long as the combination of the organic compound 121_1 and the organic compound 121_2 can form an exciplex, it is preferable that one of them be a compound having a hole-transport property and the other be a compound having an electron-transport property.

FIG. 3C shows a correlation between the energy levels of the organic compound 121_1, the organic compound 121_2, and the light-emitting material 122 in the light-emitting layer 120. The following explains what terms and numerals in FIG. 3C represent:

Host (121_1): the organic compound 121_1 (host material);

Host (121_2): the organic compound 121_2 (host material);

權(quán)利要求

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