PHOTOELECTRIC CONVERSION ELEMENT, PHOTOELECTRIC CONVERSION ELEMENT MODULE, PHOTOVOLTAIC CELL, AND PHOTOVOLTAIC POWER GENERATION SYSTEM

摘要

A photoelectric conversion element of an embodiment includes a first electrode, a second electrode, and a light absorbing layer, containing a chalcopyrite-type compound containing at least a group-Ib element, a group-IIIb element, and a group-VIb element, between the first electrode and the second electrode. The group-VIb element includes at least sulfur. An average sulfur atom concentration S1 in a side surface region of the light absorbing layer is higher than an average sulfur atom concentration S2 in an inside region of the light absorbing layer.