Abstract
AbstractWe present a compensated donor-acceptor conversion model to explain the metastable light-induced changes in the performance of CIGS solar cells. In this model, compensating donors plays the role of recombination channel. Modeling using SCAPS-1D yielded reasonable fits to the I-V curves in different metastable states, matching the experimentally observed decreases in short circuit current and fill factor as well as the lack of change in open circuit voltage. Comparison of the experimental results from bifacial solar cells and SCAPS simulations strongly supports the compensated donor-acceptor conversion model both qualitatively and quantitatively.
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