申请人:Yen Feng-Wen
公开号:US09040174B2
公开(公告)日:2015-05-26
The present invention discloses a new fluorene compound and organic EL device using the compound. The organic EL device employing the new fluorene compound as host material can lower driving voltage, prolong half-lifetime. The fluorene compound can functions as blue emitting host material of a light emitting layer and improve CIE color purity in blue emitting device. The fluorene compound are represented by the following formula(A):
Wherein R1 to R6 are identical or different. R1 to R6 are independently selected from the group consisting of a hydrogen atom, a halide, alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 6 to 30 carbon atoms. R7˜R13 are identical or different R7 to R13 are independently selected from the group consisting of hydrogen atom, halide, alkyl group, aryl group, heteroaryl group. m and n are independently an integer of 0 to 3, X is selected from carbon or nitrogen.
本发明揭示了一种新的芴化合物和使用该化合物的有机EL器件。采用新的芴化合物作为主体材料的有机EL器件可以降低驱动电压,延长半寿命。芴化合物可以作为发光层的蓝色发射主体材料,并提高蓝色发射器件的CIE色彩纯度。芴化合物的结构式为(A),其中R1至R6相同或不同。R1至R6独立地选自以下组中的一种:氢原子、卤素、具有1至20个碳原子的烷基、具有6至30个碳原子的取代或未取代芳基、具有6至30个碳原子的取代或未取代芳基烷基、具有6至30个碳原子的取代或未取代杂环芳基。R7至R13相同或不同,R7至R13独立地选自以下组中的一种:氢原子、卤素、烷基、芳基、杂环芳基。m和n分别是0至3的整数,X选自碳或氮。