Organic semiconductor material and light-emitting element, light-emitting device, lighting system, and electronic device using the same
申请人:Semiconductor Energy Laboratory Co., Ltd.
公开号:US08343639B2
公开(公告)日:2013-01-01
Disclosed is a novel organic semiconductor material which has a twisted quaterphenylene skeleton as a central unit and simultaneously possesses a skeleton having an electron-transporting property and a skeleton having a hole-transporting property at the terminals of the quaterphenylene skeleton. Specifically, the organic semiconductor material has a [1,1′:2′,1″:2″,1′″]quaterphenyl-4-4′″-diyl group, and one of the terminals of the [1,1′:2′,1″:2″,1′″]quaterphenyl-4-4′″-diyl group is bonded to a skeleton having an electron-transporting property such as a benzoxazole group or an oxadiazole group. A skeleton having a hole-transporting property such as diarylamino group is introduced at the other terminal. This structure allows the formation of a compound having a bipolar property, a high molecular weight, an excellent thermal stability, a large band gap, and high triplet excitation energy.
本发明公开了一种新型的有机半导体材料,其具有扭曲的四苯基乙烯骨架作为中心单元,并同时具有具有电子传输性质的骨架和具有空穴传输性质的骨架,位于四苯基乙烯骨架的末端。具体而言,该有机半导体材料具有[1,1′:2′,1″:2″,1′″]四苯基-4-4′″-二基基团,并且[1,1′:2′,1″:2″,1′″]四苯基-4-4′″-二基基团的一个末端与具有电子传输性质的骨架(如苯并噁唑基团或噁二唑基团)键合。在另一个末端引入具有空穴传输性质的骨架,如二芳基胺基团。这种结构允许形成具有双极性、高分子量、优异的热稳定性、大带隙和高三重激发能的化合物。