A solar cell device includes a first electrode, a photoelectric converter, and a first carrier transporter. The first carrier transporter is located between the first electrode and the photoelectric converter. The first carrier transporter includes a first surface in contact with the photoelectric converter and a second surface in contact with the first electrode. In the first carrier transporter, a first level being an energy level of a highest occupied molecular orbital of a first interface area along the first surface is lower than a second level being an energy level of a highest occupied molecular orbital of a second interface area along the second surface.

A solar cell device includes a first electrode, a photoelectric converter, and a first carrier transporter. The first carrier transporter is located between the first electrode and the photoelectric converter. The first carrier transporter includes a first surface in contact with the photoelectric converter and a second surface in contact with the first electrode. In the first carrier transporter, a first level being an energy level of a highest occupied molecular orbital of a first interface area along the first surface is lower than a second level being an energy level of a highest occupied molecular orbital of a second interface area along the second surface.