DataVXACS Energy LettersPaper
journal article·2025-03-14Open access

Charge-Phonon Coupling in Tin Halide Perovskites

Lorenzo Gatto, Isabella Poli, Daniele Meggiolaro, Federico Grandi, Giulia Folpini, Antonella Treglia, Eugenio Cinquanta, Annamaria Petrozza, Filippo De Angelis, Caterina Vozzi

ACS Energy Letters· Volume 10· Issue 3
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Abstract

High Resolution Image Download MS PowerPoint Slide 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 10 18 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 that charge-phonon coupling could serve as a proxy for the self-p-doping level, offering additional insights into fundamental charge-transport properties of tin halide perovskites and their potential optimization for photovoltaic applications.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Thermal Expansion and Ionic Conductivity · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Istituto di Fotonica e Nanotecnologie─CNR (CNR-IFN)

Center for Sustainable Future Technologies@Polito, Istituto Italiano di Tecnologia, via Livorno 60, Torino 10144, Italy

Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), Istituto CNR di Scienze e Tecnologie Chimiche “Giulio Natta” (CNR-SCITEC), Via Elce di Sotto 8, Perugia 06123, Italy

Dipartimento di Fisica

Politecnico di Milano

Center for Nano Science and Technology@Polimi, Istituto Italiano di Tecnologia, via Rubattino 81, Milano 20134, Italy

Department of Chemistry, Biology and Biotechnology, University of Perugia and INSTM, Via Elce di Sotto 8, Perugia 06123, Italy

SKKU Institute of Energy Science and Technology (SIEST) Sungkyunkwan University

Funding

HORIZON EUROPE European Innovation Council · H2020 Marie Sklodowska-Curie Actions · Ministero dell'Università e della Ricerca · Horizon 2020 Framework Programme

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