在钙钛矿探测器中通过工作电压调节单极载流子收集实现多能x射线探测和成像

IF 11.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Advances Pub Date : 2025-07-23 DOI:10.1126/sciadv.ads2995

Yuwei Li, Xin Wang, Yijing Ding, Jingda Zhao, Shilin Liu, Yubing Xu, Qi Cheng, Ziyu Wei, Damian Chinedu Onwudiwe, Byung Seong Bae, Mehmet Ertuğrul, Ying Zhu, Wenbo Ma, Yang (Michael) Yang, Wei Lei, Xiaobao Xu

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引用次数: 0

摘要

多能x射线成像可以在传统的能量集成成像中提供额外的物质信息。主要的方法是单光子计数，它对低x射线通量和信号识别有严格的要求，并且延长了成像时间。在这里，我们报道了用于多能x射线成像的单极n-i-n钙钛矿探测器的设计。系统表征验证了探测器中电子主导载流子动力学，产生的电子分布随x射线能量沿其穿透方向变化，而工作电压可以操纵电子漂移长度，确保它们选择性收集x射线能量鉴别。我们的多能成像阵列在常规成像系统中采用高通量x射线，实现了快速的四能箱x射线成像。通过引入与σ(Ei)/σ(Ej)相关的多能数字相减算法，图像可以并排或叠加区分目标的物质，比传统的能量积分成像技术有了显著的进步。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Multienergy x-ray detection and imaging enabled by working voltage regulating unipolar carrier collection in perovskite detectors

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Multienergy x-ray detection and imaging enabled by working voltage regulating unipolar carrier collection in perovskite detectors

Multienergy x-ray imaging can provide additional substance information beyond morphology in conventional energy-integration imaging. The predominant approach, single photon counting, sets stringent requirements on low x-ray flux and signal discrimination and prolongs imaging time. Here, we report on the design of unipolar n-i-n perovskite detectors for multienergy x-ray imaging. Systematic characterization validates electrons dominating carrier dynamics in detectors, and the distribution of generated electrons varies as x-ray energy along its penetrating direction, whereas working voltage can manipulate electron drift length, ensuring their selective collection for x-ray energy discrimination. Our multienergy imaging array adopts high-flux x-ray in a normal imaging system and realizes fast 4-energy-bins x-ray images. By introducing the σ(E_i)/σ(E_j)-related multienergy digital subtraction algorithm, the images successfully distinguish the substance of targets side by side or by stacking, representing a notable advancement over conventional energy-integration imaging technique.

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来源期刊

Science Advances 综合性期刊-综合性期刊

CiteScore

21.40

自引率

1.50%

发文量

1937

审稿时长

29 weeks

期刊介绍： Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.