Lead halide perovskite nanocrystals (LHP-NCs) embedded in polymer matrices are gaining traction as next-generation radiation detectors. While progress has been made on green-emitting CsPbBr₃ NCs, scant attention has been given to the scintillation properties of CsPbCl₃ NCs, which emit size-tunable UV-blue light matching the peak efficiency of ultrafast photodetectors. In this study, we explore the scintillation characteristics of CsPbCl₃ NCs produced through a scalable method and treated with CdCl₂. Spectroscopic, radiometric, and theoretical analyses on both untreated and treated NCs uncover deep hole trap states due to surface undercoordinated chloride ions, eliminated by Pb to Cd substitution. This yields near-perfect efficiency and resistance to polyacrylate mass polymerization. Radiation hardness tests demonstrate stability to high γ doses, while time-resolved experiments reveal ultrafast radioluminescence with an average lifetime as short as 210 ps. These findings enhance our comprehension of LHP NCs’ scintillation properties, positioning CsPbCl₃ as a promising alternative to conventional fast scintillators.

中文翻译：

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基于聚合物基体中 Cd 增强 CsPbCl3 纳米晶体的超快纳米复合材料闪烁体

嵌入聚合物基质中的卤化铅钙钛矿纳米晶体（LHP-NC）作为下一代辐射探测器越来越受到关注。虽然在发绿光的 CsPbBr ₃ NC方面取得了进展，但人们对 CsPbCl ₃ NC的闪烁特性却很少关注，CsPbCl 3 NC 发出的尺寸可调的紫外蓝光与超快光电探测器的峰值效率相匹配。在本研究中，我们探索了通过可扩展方法生产并用 CdCl _{2处理的 CsPbCl 3} NC的闪烁特性。对未经处理和处理过的 NC 进行光谱、辐射和理论分析，揭示了由于表面配位不足的氯离子而导致的深孔陷阱状态，通过 Pb 到 Cd 的取代消除了这些深孔陷阱状态。这产生了近乎完美的效率和对聚丙烯酸酯本体聚合的抵抗力。辐射硬度测试证明了对高 γ 剂量的稳定性，而时间分辨实验揭示了平均寿命短至 210 ps 的超快放射发光。这些发现增强了我们对 LHP NC 闪烁特性的理解，将 CsPbCl ₃定位为传统快速闪烁体的有前途的替代品。