ORGANIC ELECTROLUMINESCENCE ELEMENT, ILLUMINATION DEVICE AND DISPLAY DEVICE

摘要

This organic electroluminescence element comprises a positive electrode, a negative electrode and a light-emitting layer, wherein the reorganization energy at the time of electron transition between the ground state (S0) and the lowest excited triplet state (T1) of a light-emitting dopant contained in the light-emitting layer is 0eV-0.7eV, and the reorganization energy at the time of electron transfer reaction between the ground state (S0) and the anion radical (AR) of a host compound contained in the light-emitting layer is 0eV-0.3eV, the molecular weight of the host compound being in the range 500-3000.