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Perovskite-filled membranes for flexible and large-area direct-conversion X-ray detector arrays
Nature Photonics ( IF 35.0 ) Pub Date : 2020-08-17 , DOI: 10.1038/s41566-020-0678-x
Jingjing Zhao , Liang Zhao , Yehao Deng , Xun Xiao , Zhenyi Ni , Shuang Xu , Jinsong Huang

The soft nature of metal halide perovskites makes them potentially applicable as flexible X-ray detectors. Here we report a structure of perovskite-filled membranes (PFMs) for highly sensitive, flexible and large-area X-ray detectors. PFMs with areas up to 400 cm2 are formed by infiltrating saturated perovskite solution through porous polymer membranes followed by hot lamination. The good connectivity and crystallization of perovskite crystals in the membranes enable a large mobility–lifetime product. The sensitivity of the X-ray detectors under a field of 0.05 V µm−1 reaches 8,696 ± 228 µC Gyair−1 cm−2 and shows no degradation after storage for over six months and exposure to a dose of 376.8 Gyair, equivalent to 1.88 million chest X-ray scans. The flexible PFMs can be bent at radii down to 2 mm without losing performance. The stand-alone detector array is curved and put inside metal pipes for the detection of material defects with imaging quality superior to flat-panel detectors.



中文翻译:

钙钛矿填充膜用于柔性和大面积直接转换X射线探测器阵列

金属卤化物钙钛矿的柔软特性使其有可能用作柔性X射线探测器。在这里,我们报告钙钛矿填充膜(PFM)的结构,用于高度灵敏,灵活和大面积的X射线探测器。通过使饱和钙钛矿溶液通过多孔聚合物膜渗透,然后进行热层压,可形成面积高达400 cm 2的PFM 。钙钛矿晶体在膜中的良好连通性和结晶性使产品具有较大的移动性和使用寿命。X射线探测器在0.05 V µm -1的电场下的灵敏度达到8,696±228 µC Gy空气-1  cm -2,并且在存储六个月以上并暴露于376.8 Gy的空气中后,其显示没有衰减。,相当于188万次胸部X线扫描。灵活的PFM可以弯曲至2 mm的半径,而不会降低性能。独立的检测器阵列是弯曲的,并放置在金属管内,用于检测材料缺陷,其成像质量优于平板检测器。

更新日期:2020-08-17
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