Carbazole Derivative, Light-Emitting Element Material and Organic Semiconductor Material
申请人:Semiconductor Energy Laboratory Co., Ltd.
公开号:US20140145175A1
公开(公告)日:2014-05-29
An object is to provide a novel carbazole derivative that has an excellent carrier-transport property and can be suitably used for a transport layer or as a host material of a light-emitting element. Another object is to provide an organic semiconductor material and a light-emitting element material each using the carbazole derivative. As the carbazole derivative that can achieve the above objects, a carbazole derivative in which a carbazolyl group whose either 2- or 3-position of carbazole is substituted by the 4-position of a dibenzothiophene skeleton or a dibenzofuran skeleton is bonded to aromatic hydrocarbon that has 14 to 70 carbon atoms and includes a condensed tricyclic ring, a condensed tetracyclic ring, a condensed pentacyclic ring, a condensed hexacyclic ring, or a condensed heptacyclic ring has been able to be synthesized.
本发明的目的是提供一种新型的咔唑衍生物,具有优异的载流子传输性能,可适当用于传输层或作为发光元件的主体材料。另一个目的是提供一种使用该咔唑衍生物的有机半导体材料和发光元件材料。作为能够实现上述目的的咔唑衍生物,已经能够合成一种咔唑衍生物,其中咔唑的2-或3-位被二苯并硫或二苯并呋喃骨架的4-位取代的咔唑基与具有14至70个碳原子并包括紧密三环、紧密四环、紧密五环、紧密六环或紧密七环的芳香烃键合。