| 主权项 |
1. A photovoltaic device comprising a photovoltaic portion having light-receiving surface that receives light, the photovoltaic portion including a nano-structure,
wherein the nano-structure includes one or more first regions and one or more second regions, in each of the one or more first regions, semiconductor layer portions are arranged at a first density, in each of the one or more second regions, at least one semiconductor layer portion is arranged at a second density lower than the first density, and the nano-structure includes an insulator having a refractive index lower than refractive indices of the semiconductor layer portions arranged in the one or more first regions and the one or more second regions. |
