article published yes Yujing Wei author 0c5ff007-2600-11ee-b896-98bd8d6632940000-0001-8913-9719 Artem Volosniev author 37D278BC-F248-11E8-B48F-1D18A9856A870000-0003-0393-5525 Dusan Lorenc author 40D8A3E6-F248-11E8-B48F-1D18A9856A87 Ayan A. Zhumekenov author Osman M. Bakr author Mikhail Lemeshko author 37CB05FA-F248-11E8-B48F-1D18A9856A870000-0002-6990-7802 Zhanybek Alpichshev author 45E67A2A-F248-11E8-B48F-1D18A9856A870000-0002-7183-5203 MiLe department ZhAl department Angulon: physics and applications of a new quasiparticle project A rotating organic cation and a dynamically disordered soft inorganic cage are the hallmark features of organic-inorganic lead-halide perovskites. Understanding the interplay between these two subsystems is a challenging problem, but it is this coupling that is widely conjectured to be responsible for the unique behavior of photocarriers in these materials. In this work, we use the fact that the polarizability of the organic cation strongly depends on the ambient electrostatic environment to put the molecule forward as a sensitive probe of the local crystal fields inside the lattice cell. We measure the average polarizability of the C/N–H bond stretching mode by means of infrared spectroscopy, which allows us to deduce the character of the motion of the cation molecule, find the magnitude of the local crystal field, and place an estimate on the strength of the hydrogen bond between the hydrogen and halide atoms. Our results pave the way for understanding electric fields in lead-halide perovskites using infrared bond spectroscopy. https://research-explorer.ista.ac.at/download/13251/13253/2023_JourPhysChemistry_Wei.pdf application/pdfno American Chemical Society2023 eng General Materials SciencePhysical and Theoretical Chemistry 1948-7185 2304.14198 37405449 00102281150000110.1021/acs.jpclett.3c01158 14276309-6314 Wei, Y., Volosniev, A., Lorenc, D., Zhumekenov, A. A., Bakr, O. M., Lemeshko, M., &#38; Alpichshev, Z. (2023). Bond polarizability as a probe of local crystal fields in hybrid lead-halide perovskites. <i>The Journal of Physical Chemistry Letters</i>. American Chemical Society. <a href="https://doi.org/10.1021/acs.jpclett.3c01158">https://doi.org/10.1021/acs.jpclett.3c01158</a> Wei Y, Volosniev A, Lorenc D, et al. Bond polarizability as a probe of local crystal fields in hybrid lead-halide perovskites. <i>The Journal of Physical Chemistry Letters</i>. 2023;14(27):6309-6314. doi:<a href="https://doi.org/10.1021/acs.jpclett.3c01158">10.1021/acs.jpclett.3c01158</a> Y. Wei, A. Volosniev, D. Lorenc, A.A. Zhumekenov, O.M. Bakr, M. Lemeshko, Z. Alpichshev, The Journal of Physical Chemistry Letters 14 (2023) 6309–6314. Wei Y, Volosniev A, Lorenc D, Zhumekenov AA, Bakr OM, Lemeshko M, Alpichshev Z. 2023. Bond polarizability as a probe of local crystal fields in hybrid lead-halide perovskites. The Journal of Physical Chemistry Letters. 14(27), 6309–6314. Wei, Yujing, et al. “Bond Polarizability as a Probe of Local Crystal Fields in Hybrid Lead-Halide Perovskites.” <i>The Journal of Physical Chemistry Letters</i>, vol. 14, no. 27, American Chemical Society, 2023, pp. 6309–14, doi:<a href="https://doi.org/10.1021/acs.jpclett.3c01158">10.1021/acs.jpclett.3c01158</a>. Wei, Yujing, Artem Volosniev, Dusan Lorenc, Ayan A. Zhumekenov, Osman M. Bakr, Mikhail Lemeshko, and Zhanybek Alpichshev. “Bond Polarizability as a Probe of Local Crystal Fields in Hybrid Lead-Halide Perovskites.” <i>The Journal of Physical Chemistry Letters</i>. American Chemical Society, 2023. <a href="https://doi.org/10.1021/acs.jpclett.3c01158">https://doi.org/10.1021/acs.jpclett.3c01158</a>. Y. Wei <i>et al.</i>, “Bond polarizability as a probe of local crystal fields in hybrid lead-halide perovskites,” <i>The Journal of Physical Chemistry Letters</i>, vol. 14, no. 27. American Chemical Society, pp. 6309–6314, 2023. 132512023-07-18T11:13:17Z2025-04-23T13:01:50Z