Patent ID: 11973158
Assignee: IDEMITSU KOSAN CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A photoelectric conversion element comprising:
a photoelectric conversion layer that is formed between a first electrode layer and a second electrode layer,
wherein the photoelectric conversion layer contains Group I elements of Cu and Ag, Group III elements of In and Ga, and Group VI elements of Se and S,
the photoelectric conversion layer has a front surface-side region that is positioned on a light-receiving surface side, a rear surface-side region that is positioned on a rear surface side of a light-receiving surface, and an intermediate region that is positioned between the front surface-side region and the rear surface-side region,
a portion at which a minimum value of a band gap appears in a thickness direction of the photoelectric conversion layer is included in the intermediate region, and
when a ratio (Ag/(non-Ag I+III+VI)) of a mole amount of Ag to a sum of mole amounts of the Group I elements other than Ag, the Group III elements, and the Group VI elements is defined as an Ag concentration, a portion at which a maximum value of the Ag concentration appears in the thickness direction of the photoelectric conversion layer is included in the intermediate region,
wherein the maximum value of the Ag concentration is 0.00519 to 0.0140 and the mole amount of Ag in the rear surface-side region is 0.19 or less of the mole amount of Ag in the entire photoelectric conversion layer.