Relaxed Current Matching Requirements in Highly Luminescent Perovskite Tandem Solar Cells and Their Fundamental Efficiency Limits.

ABSTRACT: Perovskite-based tandem solar cells are of increasing interest as they approach commercialization. Here we use experimental parameters from optical spectroscopy measurements to calculate the limiting efficiency of perovskite-silicon and all-perovskite two-terminal tandems, employing currently available bandgap materials, as 42.0% and 40.8%, respectively. We show luminescence coupling between subcells (the optical transfer of photons from the high-bandgap to low-bandgap subcell) relaxes current matching when the high-bandgap subcell is a luminescent perovskite. We calculate that luminescence coupling becomes important at charge trapping rates (≤10⁶ s^-1) already being achieved in relevant halide perovskites. Luminescence coupling increases flexibility in subcell thickne

SUBMITTER: Bowman AR 

PROVIDER: S-EPMC7887871 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature