Organic electroluminescent device

摘要

An organic electroluminescent device comprising: a positive electrode and a negative electrode; a light emitting layer interposed between the electrodes; at least one positive electrode-side intermediate layer interposed between the positive electrode and the light emitting layer; and at least one negative electrode-side intermediate layer interposed between the negative electrode and the light emitting layer, wherein expressions (1) Ip(EML) - 0.1 eV < Ip(li) < Ip(EML) + 0.1 eV and (2) Ea(EML) - 0.1 eV < Ea(2i) < Ea(EML) + 0.1 eV are satisfied; expression (3) 0.1 ≤ µh/µe ≤ 10 is satisfied; and the light emitting layer contains a compound having an ionization potential lower than the ionization potential Ip(EML) of the main constituent material of the light emitting layer in an amount of from 0.5% by mass to 20% by mass relative to the total mass of the light emitting layer.