Patent attributes
An organic electroluminescent element including a pair of electrodes and one or more organic compound layers including at least one light-emitting layer disposed between the pair of electrodes, wherein the at least one light-emitting layer contains at least one luminescent dopant and a plurality of host compounds. The ionization potential of the dopant is Ip(D), the minimum value out of the ionization potentials of the plurality of host compounds is Ip(H)min, and ΔIp is defined by ΔIp=Ip(D)−Ip(H)min and satisfies a relationship of ΔIp>0 eV. The electron affinity of the dopant is Ea(D), the maximum value out of the electron affinities of the plurality of host compounds is Ea(H)max, and ΔEa is defined by ΔEa=EA(H)max−Ea(D) and satisfies a relationship of ΔEa>0 eV.
