| 摘要 |
An organic electroluminescent element comprising: an anode (3); a cathode (4); and an organic layer (5), sandwiched between the anode (3) and the cathode (4), which contains a positive and negative charge transporting material, the organic layer (5) including an acceptor region (6) doped with an acceptor, a donor region (8) doped with a donor, and a light-emitting region (7) doped with an organic light-emitting material, the acceptor region (6) being located on the anode (3), the donor region (8) being located on the cathode (4), the light-emitting region (7) being located between the acceptor region (6) and the donor region (8), the acceptor having such a concentration gradient in the acceptor region (6) as to become lower in concentration from the anode (3) toward the light-emitting region (7), the donor having such a concentration gradient in the donor region (8) as to become lower in concentration from the cathode (4) toward the light-emitting region (7). This makes it possible to provide a simple-structured, high-luminance, high-efficiency, and long-life organic EL element. |
