| abstract |
This organic electro luminescence 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 (S 0 ) and the lowest excited triplet state (T 1 ) 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 (S 0 ) 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. |