Abstract: The present disclosure relates to a solar battery including a first cell, and a second cell, and a first charge transport layer, a transparent conductive layer, a second charge transport layer and a polysilicon layer are disposed between the first photoelectric conversion layer of the first cell and the second photoelectric conversion layer of the second cell, and the second charge transport layer is disposed between the polysilicon layer and the transparent conductive layer, and the charge transport property of the second charge transport layer is the same as that of the polysilicon layer. In the solar battery of the present disclosure, a first charge transport layer, a transparent conductive layer, a second charge transport layer and a polysilicon layer are sequentially arranged between the first photoelectric conversion layer and the second photoelectric conversion layer.