Patent ID: 8729596

Claim:
An organic electroluminescent element comprising: an anode; a cathode; an organic layer, sandwiched between the anode and the cathode, which contains a positive and negative charge transporting material, the organic layer including a first region doped with an acceptor, a second region doped with a donor, and a third region doped with an organic light-emitting material, the first region being located the closest to the anode in the organic layer, the second region being located the closest to the cathode in the organic layer, the third region being located between the first region and the second region, the acceptor having such a concentration gradient in the first region as to become lower in concentration from an end of the organic layer on an anode side toward the third region, the donor having such a concentration gradient in the second region as to become lower in concentration from an end of the organic layer on a cathode side toward the third region; and the concentration gradient of the acceptor in the first region is such that the acceptor becomes lower in concentration from the anode toward the third region in proportion to an nth power (n>1) of a distance from the anode; and the concentration gradient of the donor in the second region is such that the donor becomes lower in concentration from the cathode toward the third region in proportion to an nth power (n>1) of a distance from the cathode.