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首页> 外文期刊>Advanced Materials >Flexible, Printable Soft-X-Ray Detectors Based on All-Inorganic Perovskite Quantum Dots
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Flexible, Printable Soft-X-Ray Detectors Based on All-Inorganic Perovskite Quantum Dots

机译：基于全无机钙钛矿量子点的灵活，可打印的软X射线探测器

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Metal halide perovskites represent a family of the most promising materials for fascinating photovoltaic and photodetector applications due to their unique optoelectronic properties and much needed simple and low-cost fabrication process. The high atomic number (Z) of their constituents and significantly higher carrier mobility also make perovskite semiconductors suitable for the detection of ionizing radiation. By taking advantage of that, the direct detection of soft-X-ray-induced photocurrent is demonstrated in both rigid and flexible detectors based on all-inorganic halide perovskite quantum dots (QDs) synthesized via a solution process. Utilizing a synchrotron soft-X-ray beamline, high sensitivities of up to 1450 mu C Gy(air)(-1) cm(-2) are achieved under an X-ray dose rate of 0.0172 mGy(air) s(-1) with only 0.1 V bias voltage, which is about 70-fold more sensitive than conventional alpha-Se devices. Furthermore, the perovskite film is printed homogeneously on various substrates by the inexpensive inkjet printing method to demonstrate large-scale fabrication of arrays of multichannel detectors. These results suggest that the perovskite QDs are ideal candidates for the detection of soft X-rays and for large-area flat or flexible panels with tremendous application potential in multidimensional and different architectures imaging technologies.
机译：金属卤化物钙钛矿因其独特的光电特性以及急需的简单且低成本的制造工艺而成为令人着迷的光伏和光电探测器应用的最有前途的材料家族。其成分的高原子序数（Z）和明显更高的载流子迁移率也使钙钛矿半导体适合于检测电离辐射。利用这一优势，在基于溶液法合成的全无机卤化物钙钛矿量子点（QD）的刚性和柔性检测器中，都证明了直接检测软X射线诱导的光电流。利用同步加速器软X射线束线，在0.0172 mGy（空气）s（-1）的X射线剂量率下可实现高达1450μC Gy（空气）（-1）cm（-2）的高灵敏度）仅具有0.1 V的偏置电压，其灵敏度是传统alpha-Se器件的70倍左右。此外，通过廉价的喷墨印刷方法将钙钛矿膜均匀地印刷在各种基板上，以证明大规模制造多通道检测器阵列。这些结果表明钙钛矿量子点是检测软X射线以及在多维和不同体系结构成像技术中具有巨大应用潜力的大面积平板或柔性面板的理想选择。

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