Highly Mobile Large Polarons in Black Phase CsPbI3
Source abstract
Abstract
We report the band-like\ntransport of photogenerated charge carriers\nwithin all-inorganic black γ-phase CsPbI3 (γ-CsPbI3) thin films, with local mobilities up to 270 ± 44 cm2V–1s–1 recorded using\nterahertz (THz) spectroscopy at room temperature. Temperature-dependent,\nhigh-frequency photoconductivity measurements indicate that large\npolaron formation governs charge carrier transport, following the\nFeynman polaron model. The mobility values derived using THz spectroscopy\nare nearly 1 order of magnitude higher than that reported for hybrid\norganic–inorganic lead halide perovskites and approach the\ntheoretical limit for polarons scattering from longitudinal optical\n(LO) phonons. Our results identify γ-CsPbI3 as a\nfascinating all-inorganic perovskite semiconductor with high charge\ncarrier mobility for optoelectronics and reveal the effect of polaron\nformation on charge transport properties.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · 2D Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
Funding
Hercules Foundation · Belgian Federal Science Policy Office · KU Leuven Research Fund · Flanders (FWO) · Methusalem
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