biostudies-literatureUnknown10(3)Gatto LTin halide perovskites are promising materials to replace lead-based materials for perovskite optoelectronics, yet their performance is limited by their high self-p-doping. To quantify the impact of p-doping on carrier dynamics, we combine terahertz spectroscopy and density functional theory calculations to investigate the coupling of charge carriers to the lattice in prototypical tin-based perovskites. Doping is shown to influence the charge-phonon interactions significantly. We identify the formation of polarons at doping densities below 10¹⁸ cm^-3, while a Drude-like response is found for photogenerated carriers at higher charge density, confirming that for highly p-doped systems, the terahertz response is dominated by quasi-free charge carriers. Our study suggests ACS energy letters1382-1388https://www.ebi.ac.uk/biostudies/studies/S-EPMC11915484biostudies-literatureCharge-Phonon Coupling in Tin Halide Perovskites.PMC11915484Meggiolaro DCinquanta EVozzi CTreglia APoli IGatto LDe Angelis FFolpini GPetrozza AGrandi FfalseCharge-Phonon Coupling in Tin Halide Perovskites.Tin halide perovskites are promising materials to replace lead-based materials for perovskite optoelectronics, yet their performance is limited by their high self-p-doping. To quantify the impact of p-doping on carrier dynamics, we combine terahertz spectroscopy and density functional theory calculations to investigate the coupling of charge carriers to the lattice in prototypical tin-based perovskites. Doping is shown to influence the charge-phonon interactions significantly. We identify the formation of polarons at doping densities below 10¹⁸ cm^-3, while a Drude-like response is found for photogenerated carriers at higher charge density, confirming that for highly p-doped systems, the terahertz response is dominated by quasi-free charge carriers. Our study suggests 2025-01-01T00:00:00Z2025 Mar2025-04-26T03:28:58.737Z2025-04-06T10:49:16.301ZS-EPMC119154844010994710.1021/acsenergylett.4c02558