Mn2+-Activated Cs3Cu2I5 Nano-Scintillators for Ultra-High Resolution Flexible X-Ray Imaging,Laser & Photonics Reviews

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Mn2+-Activated Cs3Cu2I5 Nano-Scintillators for Ultra-High Resolution Flexible X-Ray Imaging
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2023-03-03 , DOI: 10.1002/lpor.202200851
Zhaoyu Wang _{1,

2} , Youchao Wei _{1,

3} , Caiping Liu _{1,

3} , Yongsheng Liu _{1,

3} , Maochun Hong _{1,

2,

3}

Affiliation

Zero-dimensional (0D) copper-based perovskite-derivative nano-scintillators (NSs), as a promising non-toxic alternative to lead-based halide perovskite, have shown great potential in flexible X-ray detection and imaging. However, their practical applications are still impeded by low X-ray imaging resolution associated with inadequate radioluminescence (RL) and poor environmental stability. Herein, for the first time a simple but valid Mn²⁺-activation strategy is proposed to highly enhance the RL and stability of 0D Cs₃Cu₂I₅ NSs, where the Mn²⁺ ions are embedded into the highly localized [Cu₂I₅]³⁻ units by utilizing a modified hot-injection method. As such, a newly emerged emission band of Mn²⁺ ion centered at ≈562 nm coupled with much improved intrinsic self-trapped excitons (STE) emission of the 0D Cs₃Cu₂I₅ host peaking at ≈445 nm can be achieved in these resultant Mn²⁺-activated 0D Cs₃Cu₂I₅ NSs, thereby delivering a light yield of 71 000 photons MeV⁻¹ that is much superior to their lead-based perovskite counterparts and commercial scintillators. As a consequence, X-ray detectors made of these Mn²⁺-activated NSs implement an ultrahigh X-ray imaging resolution of 16.2 line pairs mm⁻¹ and an ultra-low detection limit of 127.5 nGy_air s⁻¹, highlighting their potential as promising candidates for flexible X-ray detection and imaging.

中文翻译：

用于超高分辨率柔性 X 射线成像的 Mn2+ 激活的 Cs3Cu2I5 纳米闪烁体

零维 (0D) 铜基钙钛矿衍生物纳米闪烁体 (NSs) 作为铅基卤化物钙钛矿的一种有前途的无毒替代品，在灵活的 X 射线检测和成像方面显示出巨大潜力。然而，它们的实际应用仍然受到与辐射发光 (RL) 不足和环境稳定性差相关的低 X 射线成像分辨率的阻碍。在此，首次提出了一种简单但有效的 Mn ^{2+激活策略，以高度增强 0D Cs}₃ Cu ₂ I ₅ NSs的 RL 和稳定性，其中 Mn ²⁺离子嵌入到高度局域化的 [Cu ₂我₅ ] ³⁻通过使用改进的热注入方法的单位。因此，新出现的以 ≈562 nm 为中心的 Mn ^{2+离子发射带与峰值为 ≈445 nm 的 0D Cs}₃ Cu ₂ I ₅主体的本征自陷激子 (STE) 发射大大改善，可以实现这些生成的 Mn ²⁺激活的 0D Cs ₃ Cu ₂ I _{5 NSs，从而提供 71 000 光子 MeV}^-1的光输出，这远优于它们的铅基钙钛矿对应物和商业闪烁体。因此，由这些 Mn ^{2+制成的 X 射线探测器}^{-激活的 NSs 实现了 16.2 线对 mm -1}的超高 X 射线成像分辨率和 127.5 nGy _air s ^-1的超低检测极限，突出了它们作为灵活 X 射线检测和成像的有前途候选者的潜力。

更新日期：2023-03-03

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