| 摘要 |
PROBLEM TO BE SOLVED: To provide an organic EL element having high external quantum efficiency. SOLUTION: In this electroluminescent element, a luminescent layer is held between a pair of electrodes, the luminescent layer is divided into at least three layers in its thickness direction. The electroluminescent element has at least two intermediate layers containing electron block materials between the divided luminescent layers, the electron block ability of the intermediate layer is the highest in the layer closer to an anode, and is the lowest in the layer closer to a cathode. COPYRIGHT: (C)2008,JPO&INPIT
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