Patent ID: 8492752

Claim:
An organic light emitting element, comprising: a pair of electrodes at least one of which has visible light transmittance; and an organic EL layer provided between the pair of electrodes that includes at least an organic light emitting layer that emits light when a voltage is applied between the pair of electrodes, the organic light emitting layer including: an electron transport host material that has a first ionization potential (IPH) and a first electron affinity (AFH); and first and second guest materials each of which has an emission peak in a blue to blue-green color region, the first guest material having a second ionization potential (IPG1) and a second electron affinity (AFG1), and wherein the first and second ionization potentials and the first and second electron affinities satisfy Expression (1) as follows: IPH≦IPG 1 and AFH<AFG 1 (1).