Dynamic X-ray imaging with screen-printed perovskite CMOS array
Yanliang Liu, Chaosong Gao, Dong Li, Xin Zhang, Jiongtao Zhu, Meng Wu, Wenjun Liu, Tongyu Shi, Xingchen He, Jiahong Wang, Hao Huang, Zonghai Sheng, Dong Liang, Xue‐Feng Yu, Hairong Zheng, Xiangming Sun, Yongshuai Ge
Abstract
Abstract High performance X-ray detector with ultra-high spatial and temporal resolution are crucial for biomedical imaging. This study reports a dynamic direct-conversion CMOS X-ray detector assembled with screen-printed CsPbBr 3 , whose mobility-lifetime product is 5.2 × 10 −4 cm 2 V –1 and X-ray sensitivity is 1.6 × 10 4 µC Gy air –1 cm –2 . Samples larger than 5 cm $$\times$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mo>×</mml:mo> </mml:math> 10 cm can be rapidly imaged by scanning this detector at a speed of 300 frames per second along the vertical and horizontal directions. In comparison to traditional indirect-conversion CMOS X-ray detector, this perovskite CMOS detector offers high spatial resolution (5.0 lp mm −1 ) X-ray radiographic imaging capability at low radiation dose (260 nGy). Moreover, 3D tomographic images of a biological specimen are also successfully reconstructed. These results highlight the perovskite CMOS detector’s potential in high-resolution, large-area, low-dose dynamic biomedical X-ray and CT imaging, as well as in non-destructive X-ray testing and security scanning.