Analysis of perovskite-silicon tandem solar cells using a semi-analytical model

Perovskite-silicon tandem solar cells show enhanced efficiencies due to the broader absorption of the solar spectrum. Luminescent coupling is generally observed in multi-junction solar cells, where a fraction of emitted photons from the higher bandgap optically active layer are absorbed by the lower bandgap optically active layer, and converted to photocurrent. Therefore, it is necessary to model the current-voltage characteristics of perovskite-silicon tandem solar cells to understand the impact of luminescent coupling on the performance of these devices. In our work, we have a semi-analytical framework to obtain the current-voltage characteristics of multijunction perovskite-silicon tandem solar cell, accounting for the presence and absence of luminescent coupling. We have compared the calculated current-voltage characteristics with experimentally measured data reported in literature.