| 摘要 |
PROBLEM TO BE SOLVED: To provide a light emitting element which has higher luminous efficiency in a light emitting element using a fluorescent substance as a luminescent material.SOLUTION: Provided is a light emitting element which uses a thermally activated delayed fluorescence 113D and a fluorescent material 113A in a luminescent layer 113 in a mixed manner. Here, the thermally activated delayed fluorescence refers to a material capable of creating by thermal activation, a singlet excited state (S) from a triplet excited state (T) by reverse intersystem crossing. |
