Patent ID: 8129612
Filing Date: 2012-03-06
Classification: H01L,Y02E,Y02P

Abstract:
1. A method for manufacturing a single-crystal silicon solar cell in which at least a metal substrate, a single-crystal silicon layer as a light conversion layer, and a transparent protective film are laminated and the transparent protective film side serves as a light receiving surface, the method comprising the steps of: preparing the metal substrate and a single-crystal silicon substrate which is of a first conductivity type; implanting at least one of a hydrogen ion and a rare gas ion into the single-crystal silicon substrate to form an ion implanted layer; forming a transparent insulator layer having light scattering properties on the metal substrate, the light scattering properties being provided by light scattering particles in the transparent insulator layer or vacancies therein; performing a surface activation treatment with respect to at lest one of the ion implanted surface of the single-crystal silicon substrate and a surface of the transparent insulator layer on the metal substrate; bonding the ion implanted surface of the single-crystal silicon substrate to the surface of the transparent insulator layer on the metal substrate; giving an impact shock to the ion implanted layer and mechanically delaminating the single-crystal silicon substrate to provide the single-crystal silicon layer; forming a plurality of diffusion regions which are of a second conductivity type different from the first conductivity type in the delaminated surface side of the single-crystal silicon layer and forming a plurality of p-n junctions in at least a plane direction so that a plurality of first conductivity type regions and the plurality of second conductivity type regions are present in the delaminated surface of the single-crystal silicon layer; forming a plurality of first individual electrodes on the plurality of first conductivity type regions of the single-crystal silicon layer and forming a plurality of second individual electrodes on the plurality of second conductivity type regions of the same; forming a first collecting electrode connecting the plurality of first individual electrodes and a second collecting electrode connecting the plurality of second individual electrodes; and forming a transparent protective film that covers the plurality of first conductivity type regions and the plurality of second conductivity type regions.