Solar cell, multi-junction solar cell solar cell module, and photovoltaic power generation system

Abstract

A solar cell according to an embodiment includes a p− electrode, an n− electrode, a p− type light-absorbing layer on the p− electrode, and an n− type layer between the p− type light-absorbing layer and the n− electrode. A first region is included in the p− type light-absorbing layer from a surface on the n− type layer side toward the p− electrode. The first region includes n− type dopant. A thickness of the first region is 1500 [nm] or more and a thickness of the p− type light-absorbing layer [nm]. A concentration of the n− type dopant of the first region is 1.0×1014 [cm−3] or more and 1.0×1019 [cm−3] or less. The concentration of the n− type dopant of the first region and a concentration of hole of the first region satisfy 10≤the concentration of the n− type dopant/the concentration of hole≤5.0×1026.

Dependencies are inferred from the claim text.