Printable Perovskite Diodes for Broad-Spectrum Multienergy X-Ray Detection,Advanced Materials

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Printable Perovskite Diodes for Broad-Spectrum Multienergy X-Ray Detection
Advanced Materials ( IF 27.4 ) Pub Date : 2023-02-28 , DOI: 10.1002/adma.202210068
Babar Shabbir _{1,

2} , Jae Choul Yu _{1,

2} , Tharindu Warnakula _{1,

2} , R A W Ayyubi ₃ , James A Pollock ₄ , M Mosarof Hossain _{1,

5} , Jueng-Eun Kim _{1,

6} , Nasiruddin Macadam ₇ , Leonard W T Ng _{7,

8} , Tawfique Hasan ₇ , Doojin Vak ₆ , Marcus J Kitchen ₄ , Jacek J Jasieniak _{1,

2}

Affiliation

Multienergy X-ray detection is critical to effectively differentiate materials in a variety of diagnostic radiology and nondestructive testing applications. Silicon and selenium X-ray detectors are the most common for multienergy detection; however, these present poor energy discrimination across the broad X-ray spectrum and exhibit limited spatial resolution due to the high thicknesses required for radiation attenuation. Here, an X-ray detector based on solution-processed thin-film metal halide perovskite that overcomes these challenges is introduced. By harnessing an optimized n-i-p diode configuration, operation is achieved across a broad range of soft and hard X-ray energies stemming from 0.1 to 10's of keV. Through detailed experimental and simulation work, it is shown that optimized Cs_0.1FA_0.9PbI₃ perovskites effectively attenuate soft and hard X-rays, while also possessing excellent electrical properties to result in X-ray detectors with high sensitivity factors that exceed 5 × 10³

µ C G y_{Vac}^{- 1} {cm}^{- 2} $\mu {\rm{C}}\;{{\bf Gy}}_{{\rm{Vac}}}^{ - 1}\;{\rm{c}}{{\rm{m}}^{ - 2}}$

and 6 × 10⁴ µC Gy⁻¹ cm⁻² within soft and hard X-ray regimes, respectively. Harnessing the solution-processable nature of the perovskites, roll-to-roll printable X-ray detectors on flexible substrates are also demonstrated.

中文翻译：

用于广谱多能 X 射线检测的可印刷钙钛矿二极管

多能 X 射线检测对于在各种诊断放射学和无损检测应用中有效区分材料至关重要。硅和硒 X 射线探测器是最常见的多能探测；然而，由于辐射衰减所需的高厚度，这些材料在宽广的 X 射线光谱中的能量辨别能力较差，并且空间分辨率有限。在这里，介绍了一种基于解决方案处理的薄膜金属卤化物钙钛矿的 X 射线探测器，它克服了这些挑战。通过利用优化的 nip 二极管配置，可在 0.1 至 10 keV 的广泛软 X 射线能量和硬 X 射线能量范围内实现操作。通过详细的实验和模拟工作，表明优化的 Cs _0.1 FA_0.9 PbI ₃钙钛矿有效衰减软X射线和硬X射线，同时还具有优异的电学性能，使X射线探测器具有超过5×10 ^{3的高灵敏度因子}