Zero-dimensional (0D) cuprous organic–inorganic hybrid halides have emerged as a new kind of scintillator due to their high light yield and adjustable emission properties in the whole visible spectral range. However, their practical application in the radiation industry is seriously hindered by the instability of Cu^I ions under humid atmospheres and oxidizing environments. Herein, we designed a new Cu(I)-based halide of [CEOMTPP]₂Cu₄Br₆ (CEOMTPP = ethoxycarbonylmethyl(triphenyl) phosphonium cation) containing a discrete [Cu₄Br₆]²⁻ nanocluster, which displays strong broadband yellow light emission with near-unity photoluminescence quantum yield (PLQY) and large Stokes shift of 206 nm. Remarkably, [CEOMTPP]₂Cu₄Br₆ shows ultra-high anti-water and anti-oxidation stability with steady emitting performance in water for over one year and in an acid–base aqueous solution for one day. Benefiting from the near-unity PLQY, large Stokes shift and negligible self-absorption, [CEOMTPP]₂Cu₄Br₆ exhibits excellent scintillation properties with a high light yield of 69 500 phonon per meV and low detection limit of 113.0 nGy s⁻¹. Furthermore, a high spatial resolution of 14.5 lp mm⁻¹ is achieved in X-ray imaging based on a [CEOMTPP]₂Cu₄Br₆@EVA composite-assembled scintillation screen, demonstrating its potential application in medical photography. This research provides a fundamental structural engineering strategy to design highly efficient and stable low-dimensional Cu(I) halides for X-ray radiation application.

中文翻译：

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用于 X 射线成像的零维卤化亚铜闪烁体，具有超高的抗水稳定性


零维 （0D） 亚铜有机-无机杂化卤化物已成为一种新型闪烁体，因为它们在整个可见光谱范围内具有高光产率和可调节的发射特性。然而，它们在辐射工业中的实际应用受到 Cu 离子在潮湿气氛和氧化环境下的不稳定性的严重阻碍。在此，我们设计了一种新的 [CEOMTPP]₂Cu₄Br₆ （CEOMTPP = 乙氧基羰基甲基（三苯基）鏻阳离子）的 Cu（）基卤化物，其中包含一个离散的 [Cu₄Br₆]²⁻ 纳米团簇，它显示出强宽带黄光发射，具有近乎统一的光致发光量子产率 （PLQY） 和 206 nm 的大斯托克斯位移。值得注意的是，[CEOMTPP]₂Cu₄Br₆ 表现出超高的抗水和抗氧化稳定性，在水中稳定发光一年以上，在酸碱水溶液中稳定发光一天。得益于近乎统一的 PLQY、大斯托克斯位移和可忽略不计的自吸收，[CEOMTPP]₂Cu₄Br₆ 表现出优异的闪烁性能，光产额高达 69 500 声子/meV，检测限低至 113.0 nGy ^s-1。此外，空间分辨率高达 14.基于 [CEOMTPP]₂Cu₄Br₆@EVA 复合组装闪烁屏的 X 射线成像实现了 5 lp ^mm-1，证明了其在医学摄影中的潜在应用。本研究为设计用于 X 射线辐射应用的高效稳定的低维 Cu（） 卤化物提供了一种基本的结构工程策略。