Solar cell

Abstract

An interdigitated back contact solar cell is provided. The solar cell comprises: a substrate having a front surface and a back surface, the front surface spaced from the back surface in a depth direction of the solar cell; a plurality of first charge­-carrier collection elements spaced apart along, and arranged on, the back surface of the substrate; a plurality of second charge-carrier collection elements spaced apart along, and arranged on, the back surface of the substrate, the first charge-carrier collection elements being interdigitated with the second charge-carrier collection elements; a first passivation layer comprising a plurality of A-portions, each A-portion interposed between a respective first charge-carrier collection element and the back surface of the substrate; and a second passivation layer comprising a plurality of B-portions, each B-portion interposed between a respective second charge-carrier collection element and the back surface of the substrate. The thickness of each B-portion of the second passivation layer in the depth direction is greater than or equal to

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