Predicting Solar Cell Performance from Terahertz and Microwave Spectroscopy

Mobilities and lifetimes of photogenerated charge carriers are core properties photovoltaic materials can both be characterized by contactless terahertz or microwave measurements. Here, the expertise from fifteen laboratories is combined to quantitatively model current-voltage characteristics a solar cell such To this end, impact measurement conditions, alternate interpretations, experimental inter-laboratory variations discussed using (Cs,FA,MA)Pb(I,Br)3 halide perovskite thin-film as case study. At 1 sun equivalent excitation, neither transport nor recombination significantly affected exciton formation trapping. Terahertz, microwave, photoluminescence transients for neat material yield consistent effective implying resistance-free JV-curve with potential power conversion efficiency 24.6 %. For grainsizes above ≈20 nm, intra-grain sum mobilities ≈32 cm2 V−1 s−1. Drift-diffusion simulations indicate that these slightly reduce fill factor cells 0.82, in accordance best-realized devices literature. Beyond perovskites, work guide highly predictive characterization any emerging semiconductor photoelectrochemical energy conversion. A best practice interpretation measurements on presented.