Yao Jiali, Huang Dan, Hu Xudong, Cheng Haiming, Wang Dayang, Li Xiaoming, Yang Wensheng, Xie Renguo
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China.
MIIT Key Laboratory of Advanced Display Material and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
ACS Omega. 2024 Jun 20;9(26):28969-28977. doi: 10.1021/acsomega.4c04077. eCollection 2024 Jul 2.
Scintillators have garnered heightened attention for their diverse applications in medical imaging and security inspection. Nonetheless, commercial scintillators encounter challenges with costly rare-earth metals and toxic elements like thallium (Tl), driving the need for sustainable, cost-effective, and eco-friendly alternatives to meet contemporary X-ray detection demands. This study focuses on exploring the potential of Cu-doped RbAgI as an effective metal halide (MH) scintillator. One-dimensional (1D) RbAgI and Cu-doped RbAgI single crystals (SCs) were synthesized by using the conventional temperature-lowering crystallization method. When excited by UV light, Cu-doped SCs emitted a broad sky-blue light at 490 nm with a high photoluminescence (PL) quantum yield (PLQY) of 76.48%. Remarkably, under X-ray excitation, these Cu-doped SCs demonstrated an outstanding light yield of 36,293 photons MeV, a relatively low detection threshold of 1.022 μGy s, and a rapid scintillation decay time of 465 ns. The prepared translucent scintillation film has good uniformity and flexibility, with a high spatial resolution of 10.2 lp mm. These results position Cu-doped RbAgI as a leading candidate among promising X-ray scintillators, offering superior scintillation light yield, excellent stability, and nontoxicity.
闪烁体因其在医学成像和安全检查中的多种应用而备受关注。然而，商业闪烁体面临着成本高昂的稀土金属和铊（Tl）等有毒元素的挑战，这推动了对可持续、经济高效且环保的替代品的需求，以满足当代X射线检测需求。本研究聚焦于探索掺铜RbAgI作为一种有效的金属卤化物（MH）闪烁体的潜力。采用传统的降温结晶法合成了一维（1D）RbAgI和掺铜RbAgI单晶（SCs）。当用紫外光激发时，掺铜SCs在490nm处发出宽谱天蓝色光，光致发光（PL）量子产率（PLQY）高达76.48%。值得注意的是，在X射线激发下，这些掺铜SCs表现出36293光子/兆电子伏的出色光输出、1.022μGy·s的相对低检测阈值以及465ns的快速闪烁衰减时间。制备的半透明闪烁膜具有良好的均匀性和柔韧性，空间分辨率高达10.2线对/毫米。这些结果使掺铜RbAgI成为有前景的X射线闪烁体中的领先候选者，具有卓越的闪烁光输出、出色的稳定性和无毒特性。
