Perovskite CsPbBr3 Single Crystal Detector for High Flux X-Ray Photon Counting
Perovskite CsPbBr3 Single Crystal Detector for High Flux X-Ray Photon Counting
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DOI：
10.1109/tmi.2022.3176801
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发表时间：
2022-11-01
影响因子：
10.6
通讯作者：
Kanatzidis, Mercouri G.
中科院分区：
文献类型：
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作者：
Pan, Lei;He, Yihui;Kanatzidis, Mercouri G.
能够分辨单个X射线光子能量的X射线光子计数探测器在医学成像中至关重要，并且高计数率对于光子计数探测器是必不可少的。在这里，我们报告的性能的钙钛矿CsPbBr 3单晶半导体探测器的X射线光子计数。CsPbBr 3探测器的噪声基底，能量响应线性，能量分辨率，计数率和偏振进行了评价。通过微调探测器的工作条件，我们的CsPbBr 3探测器与平面电极可以计数的入射X射线光子率类似于0.099和类似于0.336 Mcps/像素，分别在10%和30%的死区时间损失，与相应的能量分辨率类似于18%，在59.5 keV和类似于12%，在122 keV在相同的脉冲处理条件。我们还证明，我们的CsPbBr 3探测器在多个临床X射线扫描的典型时间尺度（例如，类似于100 s的1 s）下，在类似于0.45 M光子/s/mm（2）的X射线通量下显示出可忽略的偏振。我们的评估表明，CsPbBr 3探测器在医疗和工业诊断中的X射线光子计数应用具有很高的潜力，其成本低于当前最先进的水平。
X-ray photon-counting detectors capable of resolving the energies of single X-ray photons are critical in medical imaging, and a high count rate is essential for photon-counting detectors. Here, we report the performance of the perovskite CsPbBr3 single-crystal semiconductor detector for X-ray photon counting. The CsPbBr3 detector noise floor, energy response linearity, energy resolution, count rate, and polarization were evaluated. By fine-tuning the detector working conditions, our CsPbBr3 detector with a planar electrode can count an incident X-ray photon rate of similar to 0.099 and similar to 0.336 Mcps/pixel at 10% and 30% deadtime loss, respectively, with corresponding energy resolutions of similar to 18% at 59.5 keV and similar to 12% at 122 keV at same pulse processing conditions. We also demonstrated that our CsPbBr3 detectors show negligible polarization under an X-ray flux of similar to 0.45 M photons/s/mm(2) for the typical timescale of multiple clinical X-ray scans, such as 1 s similar to 100 s. Our evaluation demonstrates the high potential of CsPbBr3 detectors for X-ray photon-counting applications in medical and industrial diagnostics with a lower cost than the current state-of-the-art.