Organometallic complex, light-emitting element, light-emitting device, electronic device, and lighting device
申请人:Semiconductor Energy Laboratory Co., Ltd.
公开号:US09960371B2
公开(公告)日:2018-05-01
A novel organometallic complex having high heat resistance is provided. The organometallic complex, which includes a structure represented by General Formula (G1), includes iridium and a ligand. The ligand has a pyrazine skeleton. Iridium is bonded to nitrogen at the 1-position of the pyrazine skeleton. A phenyl group that has an alkyl group as a substituent is bonded at each of the 2- and 3-positions of the pyrazine skeleton, and a phenyl group that has a cyano group as a substituent is bonded at the 5-position of the pyrazine skeleton. The ortho position of the phenyl group bonded at the 2-position of the pyrazine skeleton is bonded to iridium.
In the formula, each of A1 to A4 independently represents a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms. Each of R1 to R6 independently represents any of hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, and a substituted or unsubstituted heteroaryl group having 3 to 12 carbon atoms. Each of R7 to R11 independently represents any of hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 12 carbon atoms, and a cyano group. At least one of R7 to R11 represents a cyano group.
提供了一种具有高耐热性的新型有机金属配合物。该有机金属配合物包括由通用式(G1)表示的结构,其中包括铱和配体。配体具有吡啶骨架。铱与吡啶骨架的1位氮原子形成键合。在吡啶骨架的2位和3位分别与一个具有烷基取代基的苯基键合,而在吡啶骨架的5位与一个具有氰基取代基的苯基键合。在吡啶骨架的2位苯基的邻位与铱形成键合。在该式中,A1至A4中的每一个独立表示具有1至6个碳原子的取代或未取代的烷基。R1至R6中的每一个独立表示氢、具有1至6个碳原子的取代或未取代的烷基、具有6至13个碳原子的取代或未取代的芳基,以及具有3至12个碳原子的取代或未取代的杂环芳基。R7至R11中的每一个独立表示氢、具有1至6个碳原子的取代或未取代的烷基、具有6至13个碳原子的取代或未取代的芳基、具有3至12个碳原子的取代或未取代的杂环芳基,以及氰基。R7至R11中至少有一个表示氰基。