申请人:Hodogaya Chemical Co., Ltd.
公开号:EP2269987A1
公开(公告)日:2011-01-05
[Problem]
To provide an organic compound which shows an excellent electron-injecting/transporting performance, has a hole-blocking ability and shows a high stability as a film, that is, having excellent characteristics as a material for organic electroluminescent device having high efficiency and high durability; and to provide an organic EL device comprising the compound and having high efficiency and high durability.
[Means for Solution]
A substituted bipyridyl compound represented by the general formula (1); and an organic electroluminescent device comprising a pair of electrodes and at least one organic layer sandwiched between them, wherein the compound is used as the constitutive material of at least one organic layer.
(wherein R1 to R7 may be the same or different, each representing a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a linear or branched alkyl group having from 1 to 6 carbon atoms, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group; n indicates an integer of from 2 to 4; A represents a di- to tetra-valent, substituted or unsubstituted aromatic hydrocarbon group, a di- to tetra-valent, substituted or unsubstituted aromatic heterocyclic group, a di- to tetra-valent, substituted or unsubstituted condensed polycyclic aromatic group, or a trivalent group represented by the following general formula (2):
(wherein X, Y and Z each represents a carbon atom or a nitrogen atom); provided that when n = 2, the two bipyridyl structures may direct bond to each other, and in the case, A is absent).
问题
提供一种有机化合物,该化合物显示出优异的电子注入/传输性能,具有空穴阻断能力,并且作为薄膜显示出高稳定性,即作为具有高效率和高耐久性的有机电致发光器件的材料具有优异的特性;以及提供一种包含该化合物并且具有高效率和高耐久性的有机电致发光器件。
[解决方法]
一种由通式(1)表示的取代联吡啶化合物;以及一种有机电致发光器件,该器件包括一对电极和夹在它们之间的至少一个有机层,其中该化合物被用作至少一个有机层的构成材料。
(其中 R1 至 R7 可以相同或不同,各自代表氢原子、氟原子、氯原子、氰基、三氟甲基、具有 1 至 6 个碳原子的直链或支链烷基、取代或未取代的芳香烃基、取代或未取代的芳香杂环基、或取代或未取代的缩合多环芳香基;n 表示 2 至 4 的整数; A 表示二价至四价、取代或未取代的芳香烃基团,二价至四价、取代或未取代的芳香杂环基团,二价至四价、取代或未取代的缩合多环芳香基团,或由以下通式 (2) 表示的三价基团:
(其中 X、Y 和 Z 各代表一个碳原子或一个氮原子);但当 n = 2 时,两个双吡啶基结构可直接相互键合,在这种情况下,A 不存在)。