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

Claim 7:
8. A method for manufacturing a photoelectric conversion element having a photoelectric conversion layer that is formed between a first electrode layer and a second electrode layer, the method comprising:
forming the first electrode layer;
forming a precursor layer containing Group I elements of Cu and Ag and Group III elements of In and Ga on the first electrode layer;
turning the precursor layer into a chalcogenide to form the photoelectric conversion layer; and
forming the second electrode layer on the photoelectric conversion layer,
wherein, in the forming the precursor layer, a layer containing at least Cu, a layer containing at least one of In and Ga, and a layer containing Ag are formed, respectively,
the layer containing Ag in the precursor layer is formed between a layer including a first surface on a first electrode layer side and a layer including a second surface on a second electrode layer side, and
the layer containing Ag contains a larger amount of Ag than the layer containing at least Cu and the layer containing at least one of In and Ga,
wherein, 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 maximum value of the Ag concentration in the layer containing Ag 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.