Silicon-based thin film solar cell

The utility model discloses a silicon-based thin film solar cell, which comprises a transparent substrate (1), a transparent front electrode (3), a silicon-based cell (3), a back electrode (10), a back plate (8) and a wiring box (9), and is characterized in that: the back electrode (10) consists of a first-layer transparent conductive oxide thin film (4), a transparent metal film (5) and a second-layer transparent conductive oxide thin film (6); and a layer of white polyvinyl butyral (PVB) package film (7) is covered on the second-layer transparent conductive oxide thin film (6). On the basis of reducing the using amount of noble metals, relatively high cell performance is retained; and a processing method is simple, and the silicon-based thin film solar cell is low in cost, and is convenient to operate.