| 摘要 |
Disclosed is an electronic device including an n-type organic compound layer as a portion of an electrode for hole injection or hole extraction. The electronic device includes a first electrode including a conductive layer and an n-type organic compound layer disposed on the conductive layer; a second electrode; and a p-type organic compound layer that is interposed between the n-type organic compound layer of the first electrode and the second electrode and forms an NP junction together with the n-type organic compound layer of the first electrode and energy levels of the layers satisfy the following Expressions (1) and (2): <?in-line-formulae description="In-line Formulae" end="lead"?>2 eV<E<SUB>nL</SUB>-E<SUB>F1</SUB><=4eV (1) <?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>E<SUB>pH</SUB>-E<SUB>nL</SUB><=1eV (2) <?in-line-formulae description="In-line Formulae" end="tail"?> where E<SUB>F1 </SUB>is a Fermi energy level of the conductive layer of the first electrode, E<SUB>nL </SUB>is an LUMO energy level of the n-type organic compound layer of the first electrode, and E<SUB>pH </SUB>is an HOMO energy level of the p-type organic compound layer forming the NP junction together with the n-type organic compound layer of the first electrode.
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