| 摘要 |
The present invention relates to a solar cell. The solar cell includes a substrate, a first electrode, a light absorbing layer, and a second electrode. The light absorbing layer includes an I-III-VI compound and sodium (Na). The Na has a concentration grade in which a concentration increases in the first surface direction of the light absorbing layer, adjacent to the first electrode, from a second surface of the light absorbing layer, adjacent to the second electrode. |
