Cigs solar cell and substrate for cigs solar cell

• Main Authors: OKATO, TAKESHI, KAWAMOTO, YASUSHI, ODAKA, HIDEFUMI, MITSUI, AKIRA
• Format: Patent
• Language: Chinese; English
• Published: 16.04.2012
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

Disclosed is a CIGS solar cell wherein an alkali metal can be supplied to a CIGS layer by means of a durable general configuration. Specifically disclosed is a CIGS solar cell which comprises: an insulating supporting substrate; a backside electrode layer that is provided on the insulating supporting substrate; a CIGS layer that is provided on the backside electrode layer; a buffer layer that is provided on the CIGS layer; and a transparent front-side electrode layer that is provided on the buffer layer. The solar cell is characterized by additionally comprising an alkali metal supply layer between the insulating supporting substrate and the backside electrode layer, between the backside electrode layer and the CIGS layer, or both of between the insulating supporting substrate and the backside electrode layer and between the backside electrode layer and the CIGS layer. The solar cell is also characterized in that the alkali metal supply layer contains one or more compounds that are selected from the group con