Abstract

The interdigitated back contact (IBC) solar cell has shown itself to be promising for concentrator applications. In this study examples of this type of cell are tested against varying finger width ratios of p + and n + back contacts. The current-voltage characteristics of the cells under a concentrated light of 7 suns are measured and solar cell equation parameters such as R s, R sh, I s, I ph and A are evaluated for cells having L p + to L n + finger width ratios of 1:1 to 5:1. The cell parameters are computed from experimental data on fourth-quadrant characteristics on the basis of a single-exponential solar cell model. Optimum values of these parameters are found for an IBC cell with a finger width ratio of 5:1.

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