An organometallic complex that has high emission efficiency and high heat resistance and emits blue light is provided as a novel substance. In a light-emitting element including a light-emitting layer between a pair of electrodes, the light-emitting layer includes an organometallic complex, and the organometallic complex includes a central metal and two types of ligands coordinated to the central metal. One of the two types of ligands includes a triazole skeleton including nitrogen bonded to the central metal, and the other includes a nitrogen-containing five-membered heterocyclic skeleton including carbene carbon bonded to the central metal and nitrogen bonded to carbene carbon.
提供一种具有高发射效率和高耐热性并发出蓝光的有机
金属配合物作为一种新型物质。在包括在一对电极之间的发光层的发光元件中,该发光层包括一种有机
金属配合物,该有机
金属配合物包括一个中心
金属和两种与中心
金属配位的
配体。这两种
配体中的一种包括一个三唑骨架,其中氮与中心
金属键合,另一种包括一个含氮的五元杂环骨架,其中碳卡宾与中心
金属键合,碳卡宾上的氮与中心
金属键合。