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Highly Resolved and Robust Dynamic X-Ray Imaging Using Perovskite Glass-Ceramic Scintillator with Reduced Light Scattering
Advanced Science ( IF 14.3 ) Pub Date : 2021-06-02 , DOI: 10.1002/advs.202003728 Wenbo Ma 1 , Tingming Jiang 1 , Ze Yang 2 , Hao Zhang 2 , Yirong Su 1 , Zeng Chen 3 , Xinya Chen 1 , Yaoguang Ma 1 , Wenjuan Zhu 1 , Xue Yu 2 , Haiming Zhu 3 , Jianbei Qiu 2 , Xu Liu 1 , Xuhui Xu 2 , Yang Michael Yang 1
Advanced Science ( IF 14.3 ) Pub Date : 2021-06-02 , DOI: 10.1002/advs.202003728 Wenbo Ma 1 , Tingming Jiang 1 , Ze Yang 2 , Hao Zhang 2 , Yirong Su 1 , Zeng Chen 3 , Xinya Chen 1 , Yaoguang Ma 1 , Wenjuan Zhu 1 , Xue Yu 2 , Haiming Zhu 3 , Jianbei Qiu 2 , Xu Liu 1 , Xuhui Xu 2 , Yang Michael Yang 1
Affiliation
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All-inorganic perovskite quantum dots (QDs) CsPbX3 (X = Cl, Br, and I) have recently emerged as a new promising class of X-ray scintillators. However, the instability of perovskite QDs and the strong optical scattering of the thick opaque QD scintillator film imped it to realize high-quality and robust X-ray image. Herein, the europium (Eu) doped CsPbBr3 QDs are in situ grown inside transparent amorphous matrix to form glass-ceramic (GC) scintillator with glass phase serving as both matrix and encapsulation for the perovskite QD scintillators. The small amount of Eu dopant optimizes the crystallization of CsPbBr3 QDs and makes their distribution more uniform in the glass matrix, which can significantly reduce the light scattering and also enhance the photoluminescence emission of CsPbBr3 QDs. As a result, a remarkably high spatial resolution of 15.0 lp mm−1 is realized thanks to the reduced light scattering, which is so far a record resolution for perovskite scintillator based X-ray imaging, and the scintillation stability is also significantly improved compared to the bare perovskite QD scintillators. Those results provide an effective platform particularly for the emerging perovskite nanocrystal scintillators to reduce light scattering and improve radiation hardness.
中文翻译：
使用具有减少光散射的钙钛矿玻璃陶瓷闪烁体进行高分辨率且稳定的动态 X 射线成像
全无机钙钛矿量子点 (QD) CsPbX 3（X = Cl、Br 和 I）最近已成为一类新的有前途的 X 射线闪烁体。然而，钙钛矿量子点的不稳定性和厚的不透明量子点闪烁体薄膜的强光学散射阻碍了它实现高质量和鲁棒的X射线图像。在此，铕（Eu）掺杂的CsPbBr 3 QD在透明非晶基质内原位生长，形成玻璃陶瓷（GC）闪烁体，其中玻璃相充当钙钛矿QD闪烁体的基质和封装。少量的Eu掺杂优化了CsPbBr 3量子点的结晶，使其在玻璃基体中的分布更加均匀，可以显着减少光散射，同时增强CsPbBr 3量子点的光致发光发射。结果，由于光散射的减少，实现了15.0 lp mm -1的极高空间分辨率，这是迄今为止基于钙钛矿闪烁体的X射线成像的分辨率记录，并且闪烁稳定性也显着提高。裸露的钙钛矿量子点闪烁体。这些结果特别为新兴的钙钛矿纳米晶体闪烁体提供了一个有效的平台，以减少光散射并提高辐射硬度。
更新日期：2021-08-04
中文翻译：
使用具有减少光散射的钙钛矿玻璃陶瓷闪烁体进行高分辨率且稳定的动态 X 射线成像
全无机钙钛矿量子点 (QD) CsPbX 3（X = Cl、Br 和 I）最近已成为一类新的有前途的 X 射线闪烁体。然而，钙钛矿量子点的不稳定性和厚的不透明量子点闪烁体薄膜的强光学散射阻碍了它实现高质量和鲁棒的X射线图像。在此，铕（Eu）掺杂的CsPbBr 3 QD在透明非晶基质内原位生长，形成玻璃陶瓷（GC）闪烁体，其中玻璃相充当钙钛矿QD闪烁体的基质和封装。少量的Eu掺杂优化了CsPbBr 3量子点的结晶，使其在玻璃基体中的分布更加均匀，可以显着减少光散射，同时增强CsPbBr 3量子点的光致发光发射。结果，由于光散射的减少，实现了15.0 lp mm -1的极高空间分辨率，这是迄今为止基于钙钛矿闪烁体的X射线成像的分辨率记录，并且闪烁稳定性也显着提高。裸露的钙钛矿量子点闪烁体。这些结果特别为新兴的钙钛矿纳米晶体闪烁体提供了一个有效的平台，以减少光散射并提高辐射硬度。
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