An organic electroluminescent element includes a light-emitting layer between an anode and a cathode. The light-emitting layer contains a phosphorescent light-emitting organic metal complex and at least one host compound. The difference in relative dielectric constant between the host compound and the phosphorescent light-emitting organic metal complex is 0 to -0.5, and the difference in dipole moment between the host compound and the phosphorescent light-emitting organic metal complex is 0 to -5.5 debye.
一种有机电致发光元件包括阳极和阴极之间的发光层。发光层包含
磷光发光有机
金属复合物和至少一种主化合物。主化合物与
磷光发光有机
金属复合物之间的相对介电常数差为 0 至-0.5,主化合物与
磷光发光有机
金属复合物之间的偶极矩差为 0 至-5.5 德贝。