Provided is a light emitting device excellent in luminance life.
A light emitting device comprising an anode, a cathode, a first organic layer disposed between the anode and the cathode (a layer comprising one or more phosphorescent compounds) and a second organic layer disposed between the anode and the first organic layer (a layer comprising one or more phosphorescent compounds and a crosslinked body of a crosslinkable material), wherein at least one phosphorescent compound contained in the first organic layer and at least one phosphorescent compound contained in the second organic layer are the same phosphorescent compound represented by the formula (1):
wherein M represents an iridium atom or the like, n1 represents an integer of 1 or more, n2 represents an integer of 0 or more, E1 and E2 represent a carbon atom or the like, the ring L1 represents an aromatic heterocyclic ring, the ring L2 represents an aromatic hydrocarbon ring or the like, A1-G1-A2 represents an anionic bidentate ligand, and at least one ring selected from among the ring L1 and the ring L2 has an aryl group, a monovalent heterocyclic group or a substituted amino group.
本文提供了一种亮度寿命极佳的发光器件。
一种发光器件,包括阳极、阴极、设置在阳极和阴极之间的第一有机层(由一种或多种
磷光化合物组成的层)以及设置在阳极和第一有机层之间的第二有机层(由一种或多种
磷光化合物和可交联材料的交联体组成的层),其中第一有机层中包含的至少一种
磷光化合物和第二有机层中包含的至少一种
磷光化合物是由式(1)表示的同一种
磷光化合物:
其中 M 代表
铱原子或类似物,n1 代表 1 或更大的整数,n2 代表 0 或更大的整数,E1 和 E2 代表碳原子或类似物,环 L1 代表芳香杂环,环
L2 代表
芳香烃环或类似物,A1-G1-A2 代表阴离子双齿
配体,从环 L1 和环
L2 中选出的至少一个环具有芳基、单价杂环基团或取代
氨基。