Highly efficient Sb3+-doped zinc chloride hybrid for single-component white light emission and anti-counterfeiting applications

Zero-dimensional organic-inorganic metal halides show immense potential in multifunctional application fields. In this work, a highly efficient Sb 3+ -doped 0D zinc-based hybrid single crystal, TEMA 2 ZnCl 4 (TEMA + = (C 2 H 5 ) 3 CH 3 N + ), was successfully synthesized. Under 310 nm excitation, the Sb 3+ luminescent centers generate broadband dual emissions peaking at 500 nm and 656 nm, achieving an outstanding PLQY of 97%. Leveraging this luminescence features, we fabricated a single-component WLED by directly combining the single crystal with a 310 nm UV chip. The resulting device exhibits excellent illumination parameters, featuring a low correlated color temperature of 3755 K, a high color rendering index of 92.4, and a chromaticity coordinates of (0.403, 0.420). Embedding these crystals into a PDMS matrix yielded a flexible thin film, which successfully realizes high level optical anti-counterfeiting applications based on the striking visual contrast between ambient and UV light environments. This study not only advances the design of highly efficient Sb 3+ -doped zinc chloride hybrid but also provides a valuable material for multifunctional applications.