Abstract
Chiral organic-inorganic metal halide semiconductors (OIMHSs) have recently attracted numerous interests due to their unique chirality, structural tunability, and extensive physical properties. However, most reported chiral OIMHSs contain toxic lead, which will be a potential obstacle to their further applications. Herein, we successfully synthesized a novel chiral lead-free tin(IV)-based OIMHS [(R)-3-hydroxyquinuclidinium]2SnCl6 ([R-HQ]2SnCl6). It exhibits a wide band gap (Eg) of about 4.11 eV. Moreover, [R-HQ]2SnCl6 undergoes a phase transition around 330 K (Tc) and shows distinct dielectric switching characteristics with good repeatability. This work enriches the chiral lead-free OIMHS family and stimulates further exploration of chiral lead-free OIMHS switching materials
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