Patent ID: 8653519

Claim:
An electronic device, comprising: a substrate; a first electrode formed over a surface of said substrate; a second electrode located on an opposite side of said first electrode from said substrate so as to face said first electrode; and a functional layer interposed between said first electrode and said second electrode, and formed by anodizing a first polycrystalline semiconductor layer in an electrolysis solution so as to contain a plurality of semiconductor nanocrystals, wherein said electronic device further comprises a second polycrystalline semiconductor layer interposed between said first electrode and said functional layer so as to be in close contact with said functional layer, said second polycrystalline semiconductor layer having an anodic oxidization rate in the electrolysis solution lower than that of said first polycrystalline semiconductor layer so as to function as a stop layer for exclusively anodizing said first polycrystalline semiconductor layer, said second polycrystalline semiconductor layer contains more electrons combinable with holes than said first polycrystalline semiconductor layer so as to function as said stop layer, and a combination of said first polycrystalline semiconductor layer and said second polycrystalline semiconductor layer is selected from a combination of an n-region and an n + -region, a combination of a p-region and an n-region, and a combination of a p + -region and a p − -region.