Solar Frontier K.k.

Yasuaki Iwata

Hiroki Sugimoto

Hideki Hakuma

A thin-film solar cell comprising a substrate, a first electrode layer arranged upon the substrate, a p-type light absorption layer formed by a group I-III-IVcompound arranged upon the first electrode layer, and an n-type second electrode layer arranged upon the p-type light absorption layer. The p-type light absorption layer includes Cu as a group 1 element and includes Ga and In as group III elements. The ratio of the atomic number between Cu and the group III elements in the entire p-type light absorption layer is lower than 1.0; the ratio of the atomic number between Ga and the group III elements in the surface on the second electrode layer side is no more than 0.13; and the ratio of the atomic number between Cu and the group III elements in the surface on the second electrode layer side is at least 1.0.

Growing community of inventors

Tokyo, Japan

Yasuaki Iwata