Photoelectric conversion device and photoelectric conversion system with boundary region

摘要

One of disclosed embodiments provides a photoelectric conversion device, comprising a member including a first surface configured to receive light, and a second surface opposite to the first surface, and a plurality of photoelectric conversion portions aligned inside the member in a depth direction from the first surface, wherein at least one of the plurality of photoelectric conversion portions other than the photoelectric conversion portion positioned closest to the first surface includes, on a boundary surface thereof with the member, unevenness having a difference in level larger than a difference in level of unevenness of the photoelectric conversion portion positioned closest to the first surface, and wherein the boundary surface having the unevenness is configured to localize or resonate light incident on the member from a side of the first surface around the boundary surface having the unevenness.

主权项

1. A photoelectric conversion device comprising:
a member including a first surface configured to receive light, and a second surface opposite to the first surface; and a plurality of photoelectric conversion portions aligned inside said member in a depth direction from the first surface, wherein, in a region including a boundary between said member and at least one of said plurality of photoelectric conversion portions other than said photoelectric conversion portion positioned closest to the first surface, two portions which have different refractive indices and a difference in level larger than a difference in level of said photoelectric conversion portion positioned closest to the first surface are alternately arranged at a period, a ratio of the period to a wavelength of the light falling within a range from ¼ (inclusive) to 2 (inclusive).