Reversible Circularly Polarized Luminescence Response of Chiral Antimony‐Based Hybrid Halides and Its Applications in Information Anti‐Counterfeiting and CP‐LED

Stimuli‐responsive circularly polarized luminescent materials have broad application prospects in fields such as information encryption and anti‐counterfeiting, chiral optoelectronic devices and so on. In this study, 0D antimony‐based halides enantiomer R ‐DMSO and S ‐DMSO with bright yellow fluorescence, were successfully prepared using R/S ‐3‐aminoquinine cyclic ammonium as the organic cation. Enantiomer R ‐DMSO and S ‐DMSO exhibit interesting self‐trapped excitons (STEs) emission and fascinating circular dichroism (CD) with photoluminescence quantum yield (PLQY) approaching 100%. In addition, enantiomer R ‐DMSO and S ‐DMSO exhibited significant circularly polarized luminescence (CPL) signals, with a measured luminescence dissymmetry factor () of approximately ±7.61 × 10 −4 . By immersing R/S ‐HCl in DMSO, it can be transformed into yellow fluorescence, its CPL signals are almost identical to R/S ‐DMSO. After heating at 110°C for 1 h in a vacuum oven, it is transformed back into R/S ‐HCl, this process achieves reversible switching of CPL signals. By utilizing this property, relevant applications of dual information encryption and anti‐counterfeiting have been carried out. In addition, UV pumped circularly polarized light‐emitting diode (CP‐LED) devices based on enantiomer R ‐DMSO and S ‐DMSO exhibit excellent luminescence performance, with of approximately 3.68 × 10 −3 and −3.85 × 10 −3 . This study provides a new approach for the development of stimuli‐responsive functional chiral antimony‐based hybrid halides.