材料科学
X射线探测器
光电子学
钙钛矿(结构)
制作
剥脱关节
探测器
灵敏度(控制系统)
吸收(声学)
X射线
薄膜
纳米技术
光学
电子工程
复合材料
石墨烯
物理
工程类
医学
病理
化学工程
替代医学
作者
Yuki Haruta,Takumi Ikenoue,Masao Miyake,Tetsuji Hirato
出处
期刊:MRS Advances
[Springer Nature]
日期:2020-02-01
卷期号:5 (8-9): 395-401
被引量:28
摘要
X-ray imaging is a valuable technique used for medical imaging and non-destructive inspection of industrial products. However, the radiation may put humans at risk of developing cancer. Consequently, highly sensitive X-ray detectors, which enable X-ray imaging at a low dose rate, are required. Metal halide perovskite materials have demonstrated excellent X-ray detection performance including a high sensitivity owing to their high absorption coefficient, high carrier mobility, and long carrier lifetime. However, perovskite thick films with a large area, which is essential to realize the application of such materials to X-ray imaging devices have not been extensively investigated. To this end, in this study, a polymer is employed as a buffer layer to avoid film exfoliation, which makes it difficult to fabricate perovskite thick films, and a 110-μm-thick CsPbBr3 film is successfully obtained using a scalable solution method. In addition, an X-ray detector based on the CsPbBr3 thick film is fabricated, which demonstrates a sensitivity of 11,840 μC Gyair-1 cm-2. This sensitivity is approximately 600 times higher than that of the existing commercial a-Se X-ray detectors.
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