自组织像素化 Cs4PbBr6 闪烁体板，用于大面积、超灵活、高空间分辨率和稳定的 X 射线成像,Advanced Optical Materials

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自组织像素化 Cs4PbBr6 闪烁体板，用于大面积、超灵活、高空间分辨率和稳定的 X 射线成像
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2022-11-09 , DOI: 10.1002/adom.202201751
Guoqiang Peng ₁ , Baoyi An ₁ , Huanyu Chen ₁ , Zhizai Li ₁ , Youkui Xu ₁ , Qian Wang ₁ , Tao Wang ₁ , Haoxu Wang ₁ , Liming Ding ₂ , Zhiwen Jin ₁

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目前，国防、医疗等领域迫切需要X射线探测器的高性能（稳定性、空间分辨率、光产率）和多功能（低成本、大面积、柔性）应用。在此，自组织像素化零维金属卤化物 Cs ₄ PbBr ₆基微盘用于低成本 (0.0238 $ cm ^-2, 1/37 of CsI(Tl)), 设计、制备并应用了大面积超柔性闪烁体板。理论模型描述了基于微盘的结构被空气与其他结构隔开可以减少闪烁体内部的横向光学扩散，特别是当“像素”表面的光学边界被金属涂层改变时。同时，这种结构也抑制了弯曲时晶体中应力的产生。进一步表征指出，制造的闪烁体板具有高空间分辨率（≈15.9 lp mm ^-1）和光产率（≈19000 ph Me V ^-1). 特别是，该器件在各种极端环境老化和极端弯曲测试（折叠、长时间保持弯曲）中表现出优异的稳定性，空间分辨率几乎没有下降。最后，展示了与各种光电器件耦合的良好适用性和无损测量的成功成像演示。据信，这些发现提供了一种低成本且灵活的闪烁体制备方案，并展示了卓越的设计范例。

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Self-Organizing Pixelated Cs4PbBr6 Scintillator Plate for Large-Area, Ultra-Flexible, High Spatial Resolution and Stable X-Ray Imaging

Nowadays, high performance (stability, spatial resolution, and optical yield) and multi-functional application (low-cost, large-area, and flexible) are urgently needed for X-ray detectors in national defense and medical treatment et al. Herein, self-organizing pixelated zero-dimensional metal halide Cs₄PbBr₆ based micro-disks for low-cost (0.0238 $ cm⁻², 1/37 of CsI(Tl)), large-area and ultra-flexible scintillator plates are designed, prepared and applied. The theoretical model describes that the micro-disks-based structure being separated from others by air can reduce the transverse optical diffusion within the scintillator, especially when the optical boundary of “pixel” surface is changed by metal coating. Meanwhile, such structure also inhibits the stress generation in the crystal when bent. Further characterization points out that the fabricated scintillator plate possesses high spatial resolution (≈15.9 lp mm⁻¹) and light yield (≈19000 ph Me V⁻¹). Especially, the device shows excellent stability and almost no deterioration of spatial resolution after aging in various extreme environments and in extreme bending tests (folding, keeping bending for a long time). Finally, the good suitability to couple with various photoelectric devices and successful imaging demonstrations of nondestructive measurement are exhibited. It is believed that these findings provide a low-cost and flexible scintillator preparation scheme and demonstrate a pre-eminent design paradigm.

更新日期：2022-11-09

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