A Study of Halide Ion Exchange-Induced Phase Transition in CsPbBr₃ Perovskite Quantum Dots for Detecting Chlorinated Volatile Compounds.

ABSTRACT: The unique optical properties of perovskite quantum dots (PQDs), particularly the tunable photoluminescence (PL) across the visible spectrum, make them a promising tool for chlorinated detection. However, the correlation between the fluorescence emission shift behavior and the interface of phase transformation in PQDs has not been thoroughly explored. In this study, we synthesized CsPbBr₃ PQDs via the hot-injection method and demonstrated their ability to detect chlorinated volatile compounds such as HCl and NaOCl through a halide exchange process between the PQDs' solid thin film and the chlorinated vapor phase. This exchange process, which occurs alongside chloride (Cl) and bromine (Br) ion exchange and halide atom rearrangement, leads to sequential structural changes: the ini

SUBMITTER: Kuo CC 

PROVIDER: S-EPMC11788985 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature