摘要 : Lead halide perovskite quantum dots (QDs) arecontroversial due to their high lead content. Tin, a low-toxicelement with an outer electronic structure similar to that of Pb,becomes a strong candidate for preparing lead-free perovsk... 展开 Lead halide perovskite quantum dots (QDs) arecontroversial due to their high lead content. Tin, a low-toxicelement with an outer electronic structure similar to that of Pb,becomes a strong candidate for preparing lead-free perovskite QDs.However, tin-based perovskite QDs, especially CsSnCl3QDs,exhibit poor environmental stability. Herein, we proposed anstrategy for highly stable CsSnCl3QDs using an ionic liquid as asolvent and antioxidant and gelatin as a multidentate ligand andcoating material through an in situ method ([AMIM]Cl/gelatin-QDs). The results showed that the abundant active groups ofgelatin served as the nucleation growth center for QDs and furtherpassivated QDs. At the same time, the long molecular chain ofgelatin can coat the QDs to isolate the environment and fully protect QDs, and the size of QDs grown in gelatin was 5-10 nm. Inaddition, the oxidation resistance of ionic liquids and the halogen-rich environment formed also played an important role. Even if[AMIM]Cl/gelatin-QDs were treated with water and ultraviolet light simultaneously, its remainingfluorescence intensity was stillabove 60% within 72 h. Meaningfully, QDs endowed the composite system mildew resistance, which can resist the erosion of gelatinby molds, thereby realizing the system's long-term protection toward CsSnCl3QDs. 收起