An object is to provide a light-emitting element with high emission efficiency which includes a novel carbazole derivative that has a wide energy gap and can be used for a transport layer or a host material in a light-emitting element. A carbazole derivative in which the 4-position of dibenzothiophene or dibenzofuran is bonded to the 2- or 3-position of carbazole has been able to be provided by use of the carbazole derivative. Further, a light-emitting element having high emission efficiency has been able to be provided by use of the carbazole derivative.
本发明旨在提供一种具有高发射效率的发光元件,该元件包括一种具有宽能隙的新型
咔唑衍
生物,可用于光发射元件中的传输层或主体材料。通过使用
咔唑衍
生物,可以提供一种将
二苯并噻吩或
二苯并呋喃的4位与
咔唑的2位或3位键合的
咔唑衍
生物。此外,通过使用
咔唑衍
生物,可以提供具有高发射效率的发光元件。