2026-10-12T13:03:59Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34033717 2026-09-30T16:05:44Z category_1 category_915 category_7 category_14 category_15 category_873 portal_63 item_type_6 month_year_09_2026

Anisotropic Lattice Dynamics and Carrier–Phonon Coupling in Sb₂Se₃ Crystals Huijie Liu (717840) Kelvin H. L. Zhang (7345310) Ye Yang (297214) Biophysics Physical Sciences not elsewhere classified Medicine Molecular Biology Neuroscience Chemical Sciences not elsewhere classified strongly bound polarons sound velocities extracted relevant device designs phonon transport behavior effective photovoltaic materials anisotropic lattice dynamics crystals antimony chalcogenides 3 </ sub 2 </ sub single crystals propagating along measurements demonstrate elastic response computational results Antimony chalcogenides (Sb₂X₃) have emerged as promising, high-efficiency, and cost-effective photovoltaic materials. We employ femtosecond transient reflectivity (TR) spectroscopy to generate and resolve coherent acoustic phonons (CAPs) propagating along the three principal crystallographic directions of the Sb₂Se₃ single crystals. Sound velocities extracted from Brillouin oscillation frequencies agree well with the computational results. We quantify the electron–hole deformation potential, which suggests that strongly bound polarons are unlikely in this material. Our measurements demonstrate that highly anisotropic interatomic bonding dictates its elastic response and phonon transport behavior, delivering critical experimental benchmarks to guide the relevant device designs. 2026-09-30T00:00:00Z Text Journal contribution 10.1021/acs.jpcc.6c06320.s001 https://figshare.com/articles/journal_contribution/Anisotropic_Lattice_Dynamics_and_Carrier_Phonon_Coupling_in_Sb_sub_2_sub_Se_sub_3_sub_Crystals/34033717 CC BY-NC 4.0