A luminescence device is principally constituted by a pair of electrodes and an organic compound layer disposed therebetween. The layer contains a metal coordination compound represented by the following formula (1):
1
wherein M denotes Ir, Rh or Pd; n is 2 or 3; CyN denotes a substituted or unsubstituted cyclic group containing a nitrogen atom connected to M and capable of containing another nitrogen atom and/or a sulfur atom; and CyC denotes a substituted or unsubstituted cyclic group containing a carbon atom connected to M and capable of containing a nitrogen atom and/or a sulfur atom, CyN and CyC being connected to each other via a covalent bond, and each of substituents for CyN and CyC being selected from the group consisting of a halogen atom; nitro group; a trialkylsilyl group containing three linear or branched alkyl groups each independently having 1-8 carbon atoms; and a linear or branched alkyl group having 1-20 carbon atoms capable of including one or at least two non-neighboring methylene groups which can be replaced with —O—, —S—, —CO—, —CO—O—, —O—CO—, —CH═CH— or —C≡C— and capable of including a hydrogen atom which can be replaced with a fluorine atom; with the proviso that a sum of nitrogen atom and sulfur atom present in ring structures of CyN and CyC is at least 2.
发光器件主要由一对电极和置于其间的有机化合物层构成。该层含有下式(1)所代表的
金属配位化合物:
1
其中 M 表示 Ir、Rh 或 Pd;n 为 2 或 3;CyN 表示取代或未取代的环状基团,该基团含有一个与 M 相连的氮原子,并可含有另一个氮原子和/或
硫原子;以及 CyC 表示取代或未取代的环状基团,该基团含有一个与 M 相连的氮原子,并可含有另一个氮原子和/或
硫原子;CyC 表示一个取代或未取代的环状基团,其中含有一个与 M 相连的碳原子,并可含有一个氮原子和/或一个
硫原子,CyN 和 CyC 通过共价键相互连接,CyN 和 CyC 的每个取代基均选自由卤素原子、硝基组成的组;含有三个各自独立具有 1-8 个碳原子的直链或支链烷基的三烷基
硅烷基;以及具有 1-20 个碳原子的直链或支链烷基,该烷基可包括一个或至少两个非相邻亚甲基,这些亚甲基可用-O-、-S-、-CO-、-CO-O-、-O-CO-、-CH═CH-或-C≡C-,并能包括一个可被
氟原子取代的氢原子;但在 CyN 和 CyC 的环结构中存在的氮原子和
硫原子之和至少为 2。