通过在 Cs3Cu2I5 单晶中微量掺杂异价磁离子实现创纪录的闪烁性能,Advanced Materials

当前位置： X-MOL 学术 › Adv. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

通过在 Cs3Cu2I5 单晶中微量掺杂异价磁离子实现创纪录的闪烁性能
Advanced Materials ( IF 27.4 ) Pub Date : 2023-08-09 , DOI: 10.1002/adma.202304938
Qian Yao ₁ , Jiaming Li _{2,

3} , Xuesong Li ₁ , Yusheng Ma ₁ , Haohang Song ₁ , Zhiyuan Li ₂ , Zungang Wang ₂ , Xutang Tao ₁

Affiliation

超亮、超快且低成本的理想闪烁体一直缺乏，并且是闪烁检测中迫切需要的，但迄今为止尚未找到。这里，高质量块状 Cs ₃ Cu ₂ I ₅ :Mn 单晶闪烁体具有超高光产额（约 95 772 光子每 MeV，¹³⁷ Cs γ 射线）、出色的能量分辨率（3.79%，662 keV）和据报道，超快闪烁衰减时间（3 ns，81.5%）。在机理上，发现异价磁性离子的微掺杂（ppm级）可以有效调节闪烁体中自俘获激子的发光动力学。与之前的报道相比， Cs ₃ Cu ₂ I ₅单晶中微量磁性Mn ^{2+ (≈18.6 ppm)的引入使闪烁衰变时间缩短了数百倍，将慢速衰变转变为超快衰变。}同时，光输出也增加了约三倍，达到迄今为止的最高值。_{从微掺杂Cs 3} Cu ₂ I ₅ :Mn单晶的综合性能来看，这些优异的闪烁性能、适合实际应用的物理特性以及低成本的优势使得该单晶成为理想的闪烁体，具有巨大的应用潜力。商业化。

"点击查看英文标题和摘要"

Achieving a Record Scintillation Performance by Micro-Doping a Heterovalent Magnetic Ion in Cs3Cu2I5 Single-Crystal

An ultrabright, ultrafast, and low-cost ideal scintillator has been critically absent and is sorely desired in scintillation detection, but has hitherto not been found. Here, a high-quality bulk Cs₃Cu₂I₅:Mn single-crystal scintillator with ultrahigh light yield (≈95 772 photons per MeV, ¹³⁷Cs γ-rays), excellent energy resolution (3.79%, 662 keV), and ultrafast scintillation decay time (3 ns, 81.5%) is reported. In mechanism, it is found that micro-doping of a heterovalent magnetic ion (at the ppm level) can effectively modulate the luminescence kinetics of self-trapped excitons in the scintillator. Compared with previous reports, the introduction of trace amounts of magnetic Mn²⁺ (≈18.6 ppm) in Cs₃Cu₂I₅ single-crystal shortens the scintillation decay time by several hundred times, transforming the slow decay into an ultrafast decay. Simultaneously, the light yield is also increased about three times to the highest value so far. From the comprehensive performance of the micro-doped Cs₃Cu₂I₅:Mn single-crystal, these excellent scintillation properties, physical characteristics suitable for practical applications, and low-cost advantages render this single-crystal an ideal scintillator with great potential for commercialization.

更新日期：2023-08-09

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南