METHOD FOR PRODUCING METAL CHALCOGENIDE LAYER AND METHOD FOR MANUFACTURING PHOTOELECTRIC CONVERSION DEVICE

PROBLEM TO BE SOLVED: To provide a metal chalcogenide layer high in photoelectric conversion efficiency, and a photoelectric conversion device including the metal chalcogenide layer.SOLUTION: A method for producing a metal chalcogenide layer includes: a first temperature rising step of rising temperature of a coating containing a metal element up to a first temperature in first atmosphere including a chalcogen element with a first concentration and forming a metal chalcogenide in the coating; a cooling step of cooling the coating to a second temperature lower than the first temperature; and a second temperature rising step of rising temperature of the coating up to a third temperature higher than the first temperature in second atmosphere including a chalcogen element with a second concentration lower than the first concentration or including no chalcogen element.