In the case of a light illumination (whether it is the sun light, or the light produced by other light emitting bodies), the battery absorbs light energy, and the two ends of the battery appear different from the accumulation of the same charge ". In the light of the role of the photovoltaic effect, the two ends of the solar cells generate electric potential, the conversion of light energy into electrical energy, is an energy conversion device. Solar cells in general for silicon solar cells, divided into single crystal silicon solar cells, polycrystalline silicon solar cells and amorphous silicon solar cells three.