Coherent exciton-lattice dynamics in a 2D metal organochalcogenolate semiconductor
Femtosecond resonant impulsive vibrational spectroscopy and non-resonant Raman scattering were used to identify vibrational modes that strongly couple to excited carriers in 2D silver phenylselenolate, a newly discovered metal organochalcogenolate semiconductor. These measurements, together with computational simulation, elucidate the complex vibrational landscape of this covalently bound hybrid material, which is distinct from all-inorganic van der Waals semiconductors and halide perovskites. These results motivate future molecular engineering efforts to control optoelectronic properties in hybrid organic-inorganic systems.