CRYSTALLINE-SILICON SOLAR CELL, CRYSTALLINE-SILICON SOLAR-CELL MODULE, AND MANUFACTURING METHODS THEREFOR

摘要

Problem to be solved is providing a crystalline silicon-based solar cell in which a plated metal electrode layer is formed on the entire back surface, while precipitation of an undesired metal, diffusion of a metal into a silicon substrate, and so on are suppressed. To solve the problem, a crystalline silicon-based solar cell according to the present invention includes a first intrinsic silicon-based thin-film (2), a p-type silicon-based thin-film (3), a first transparent electrode layer (4), and a patterned collecting electrode (11) on a first principal surface (51) of an n-type crystalline silicon substrate (1); and a second intrinsic silicon-based thin-film (7), an n-type silicon-based thin-film (8), a second transparent electrode layer (9), and a plated metal electrode (21) on a second principal surface (52) of the n-type crystalline-silicon substrate (1). On a peripheral edge of the first principal surface, an insulating region freed of a short-circuit between the first transparent electrode layer (4) and the second transparent electrode layer (9) is provided. The plated metal electrode (21) is formed on an entire region of the second transparent electrode layer (9).