Abstract
Impedance spectroscopy is used to characterize a commercial solar cell, at various dc bias potentials, under illumination and dark conditions. Interesting features are observed in medium and low frequency range, at large bias potentials. All the models reported in literature utilize combinations of resistances and capacitances, but the results indicate that inductances are necessary to model the actual solar cell, since an inductive loop is observed in the medium frequency range, especially at large bias potential, both under illumination and dark conditions. A new circuit which captures all the trends semi quantitatively is proposed to model the data.
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