| 摘要 |
PURPOSE: A light emitting element is provided to have low driving voltage and superior life time properties by including an electron injection layer in some of a layer comprising phosphor material. CONSTITUTION: A light emitting element comprises a positive electrode and a negative electrode, one layer comprising luminous material between the positive electrode and the negative electrode. The layer comprises a layer including a material in chemical formula 1, and one element selected from alkali metal, alkaline earth metal and transition metal. In chemical formula 1, X1 is chemical formula 1-a, and X2 is chemical formula 1-b, 1-c, or 1-d. R1-R8 is halogen, cyan group, a C1-10 alkyl group, a C1-10 haloalkyl group, a C1-10 alkoxy group, a substituted or non-substituted aryl group, a substituted or non-substituted heterocyclic group. |
