Low‐dimensional ns²‐metal halide compounds have received immense attention for applications in solid‐state lighting, optical thermometry and thermography, and scintillation. However, these are based primarily on the combination of organic cations with toxic Pb²⁺ or unstable Sn²⁺, and a stable inorganic luminescent material has yet to be found. Here, the zero‐dimensional Rb₇Sb₃Cl₁₆ phase, comprised of isolated [SbCl₆]³⁻ octahedra and edge‐sharing [Sb₂Cl₁₀]⁴⁻ dimers, shows room‐temperature photoluminescence (RT PL) centered at 560 nm with a quantum yield of 3.8±0.2 % at 296 K (99.4 % at 77 K). The temperature‐dependent PL lifetime rivals that of previous low‐dimensional materials with a specific temperature sensitivity above 0.06 K⁻¹ at RT, making it an excellent thermometric material. Utilizing both DFT and chemical substitution with Bi³⁺ in the Rb₇Bi_3−3x Sb_3x Cl₁₆ (x ≤1) family, we present the edge‐shared [Sb₂Cl₁₀]⁴⁻ dimer as a design principle for Sb‐based luminescent materials.

中文翻译：

---

Rb7 Bi3-3x Sb3x Cl16 系列：具有室温发光成员的全无机固溶体。

低维 ns ² -金属卤化物化合物在固态照明、光学测温和热成像以及闪烁方面的应用受到了极大的关注。然而，这些主要基于有机阳离子与有毒的Pb ²⁺或不稳定的Sn ²⁺的结合，并且尚未发现稳定的无机发光材料。此处，零维 Rb ₇ Sb ₃ Cl _{16相由孤立的 [SbCl 6} ] ³⁻八面体和边缘共享 [Sb ₂ Cl ₁₀ ] ⁴⁻二聚体组成，显示出以 560 为中心的室温光致发光 (RT PL) nm，296 K 时量子产率为 3.8±0.2 %（77 K 时量子产率为 99.4 %）。与温度相关的 PL 寿命可与以前的低维材料相媲美，在室温下具有高于 0.06 K ^-1的特定温度敏感性，使其成为一种出色的测温材料。利用 DFT 和Rb ₇ Bi _{3−3 x} Sb _{3 x} Cl ₁₆ ( x ≤ 1) 系列中 Bi ³⁺的化学取代，我们提出了边缘共享的 [Sb ₂ Cl ₁₀ ] ⁴⁻二聚体作为设计原理用于锑基发光材料。