The development of efficient, stable, and cost‐effective luminescent materials is crucial for advancing lighting and display technologies. In this study, a series of tunable luminescent materials based on the novel 0D all‐inorganic perovskite (AIP) crystal Rb₃ZnBr₅ (RZB) is obtained. The emission of Sn2⁺ doped RZB spans the entire visible light range and extends into the near‐infrared (NIR) region, achieving a photoluminescence quantum yield (PLQY) of 75%. The distinct lifetimes combined with theoretical calculations, indicate that the broadband dual‐peak emissions at 496 and 636 nm originate from the singlet and triplet states of Sn2⁺, respectively, which is rarely observed in Sn2⁺‐doped perovskite crystals. The phosphor RZB:Sn2⁺ demonstrates the high thermal stability, along with excellent moisture and air stability. Co‐doping RZB with Sn2⁺ and Mn2⁺ broadens the excitation spectrum and allows precise control over the excitation wavelength, facilitating dynamic transitions from warm white to yellow and green light. This feature is particularly beneficial for multicolor LEDs and multi‐level anti‐counterfeiting applications.

中文翻译：

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用于单组件多色 LED 应用的 0D Rb3ZnBr5 晶体的可调谐光谱发射


开发高效、稳定且具有成本效益的发光材料对于推进照明和显示技术至关重要。在这项研究中，获得了一系列基于新型0D全无机钙钛矿（AIP）晶体Rb₃ZnBr₅（RZB）的可调谐发光材料。 Sn2⁺掺杂的RZB的发射跨越整个可见光范围并延伸到近红外（NIR）区域，实现了75%的光致发光量子产率（PLQY）。不同的寿命结合理论计算表明，496 nm和636 nm处的宽带双峰发射分别源自Sn2⁺的单重态和三重态，这在Sn2⁺掺杂的钙钛矿晶体中很少观察到。荧光粉 RZB:Sn2⁺ 具有高热稳定性以及出色的湿气和空气稳定性。用 Sn2⁺ 和 Mn2⁺ 共掺杂 RZB 可拓宽激发光谱，并允许精确控制激发波长，促进从暖白光到黄光和绿光的动态转变。此功能对于多色 LED 和多级防伪应用特别有利。