Zero-dimensional (0D) metal halide perovskites with localized exciton environments have emerged as a new generation of high-efficiency luminescent materials. Introducing dopants into these luminescent materials have become a versatile way to tune photoluminescence for various optical application. Here, we report the synthesis of trivalent antimony (Sb³⁺) doped Cs₃CdBr₅ with 0D structure using the solvothermal method. Theoretical calculations indicate that the undoped Cs₃CdBr₅ perovskite has no emission due to the parity-forbidden transitions, whereas Sb³⁺-doped Cs₃CdBr₅ exhibits no forbidden transitions. Experimentally, Sb³⁺ doping significantly enhances the emission quantum yield from 0% to an impressive 94.14%. The intrinsic photophysical mechanism of the host-guest system is further elucidated by temperature-dependent photoluminescence spectra. With its excellent luminescence performance and temperature-dependent photoluminescence characteristics, Sb³⁺-doped Cs₃CdBr₅ shows potential for applications in lighting, encryption, and anti-counterfeiting. This work highlights the impact of Sb³⁺ ion doping on the optical properties of 0D metal halide perovskites Cs₃CdBr₅, enabling multi-functional applications through their enhanced luminescence properties.

中文翻译：

---

异价离子掺杂的 0D Cs3CdBr5 具有接近一致的光致发光产率和多功能应用


具有局域激子环境的零维 （0D） 金属卤化物钙钛矿已成为新一代高效发光材料。将掺杂剂引入这些发光材料已成为为各种光学应用调整光致发光的通用方法。在这里，我们报道了使用溶剂热法合成具有 0D 结构的三价锑 （Sb³⁺） 掺杂 Cs₃CdBr₅。理论计算表明，未掺杂的 Cs₃CdBr₅ 钙钛矿由于奇偶性禁止的转变而没有发射，而 Sb³⁺ 掺杂的 Cs₃CdBr₅ 没有表现出禁止的转变。在实验上，Sb³⁺ 掺杂显著提高了发射量子产率，从 0% 提高到令人印象深刻的 94.14%。主客体系统的内在光物理机制通过温度依赖性光致发光光谱进一步阐明。凭借其优异的发光性能和与温度相关的光致发光特性，Sb³⁺ 掺杂的 Cs₃CdBr₅ 在照明、加密和防伪方面显示出应用潜力。这项工作强调了 Sb³⁺ 离子掺杂对 0D 金属卤化物钙钛矿 Cs₃CdBr₅ 光学特性的影响，通过其增强的发光特性实现多功能应用。