| 摘要 |
PROBLEM TO BE SOLVED: To provide an EL element formed by laminating an organic layer at least composed of a plurality of light-emitting layers having different emission colors between a pair of electrodes, capable of emitting light for a long time with prescribed brightness and prolonging a lifetime. SOLUTION: The EL element is formed by laminating an organic layer 5 at least composed of a plurality of light emitting layers having different emission colors between an anode (first electrode) 3 and a cathode (second electrode ) 6. The light emitting layer is composed of a first light emitting layer 5b located at the anode 3 side formed by mixing a first host material having hole transporting property and a first light emitting material, and a second light emitting layer 5c located at the cathode 6 side so as to contact the first light emitting layer 5b formed by mixing the first host material, a second host material capable of transporting hole and electron, and a second light emitting material. COPYRIGHT: (C)2006,JPO&NCIPI
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