Fluorination-Induced Room-Temperature Ferroelectricity in a Quasi-spherical Bismuth(III) Bromide Hybrid

. Piezoelectric force microscopy (PFM) analysis reveals domain structures, hysteresis loops, and butterfly curves, confirming the ferroelectric and piezoelectric properties of this compound. This study demonstrates fluorination as a potent molecular design strategy for exploring and constructing new ferroelectric materials.