Precise Manipulation the Efficient Multi-Exciton Emission with High Thermal Stability in Hybrid Manganese-Antimony Chloride for Optical Thermometry, Anti-Counterfeiting, and Information Encryption

Recently, zero-dimensional (0D) metal halides with highly efficient tunable emission have shown broad prospects in the field of anti-counterfeiting. However, the limited emission colors and low resolution, as well as the severe thermal quenching of self-trapped excitons, have greatly constrained their applications. In this study, a high thermal stability compound by precisely manipulating the multi-exciton emission within Sb-doped hybrid manganese chloride is developed, which exhibits three emission colors (green, orange, and yellow). It is discovered that this compound exhibits significant color changes in the low-temperature range. Optical temperature sensing, anti-counterfeiting, and information encryption models based on this compound are successfully designed. This research proposes an effective strategy for designing novel eco-friendly and efficient anti-counterfeiting and temperature sensing materials, paving the way for optical temperature sensing and multi-key encryption-decryption applications. By precisely controlling the multiexciton emission of a hybrid manganese chloride doped with sb, a highly thermally stable compound with three emission colors (green, orange, yellow) has been developed. The optical temperature sensing, anti-counterfeiting and information encryption models based on the compound are designed.image