Controllable printing perovskite thick film for X-ray flat panel imaging

IF 13.2 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2024-12-15 DOI:10.1016/j.cej.2024.158656

Zihan Wang, Yuanbo Ma, Changmao Wan, Hui Zhang, Xu Pan, Jiajiu Ye

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引用次数: 0

Abstract

Halide perovskites exhibit substantial potential for use in X-ray imaging applications. However, significant challenges persist in seamlessly integrating these materials with pixelated array readout circuits and in ensuring sufficient attenuation for direct X-ray detection imaging. In this study, we propose a reliable approach involving the manipulation of crystallization dynamics, rheological engineering, and an inter-grain cross-linking strategy to prepare robust and tunable perovskite-polymer composite (PPC) films on the scale of hundreds of microns. The PPC film was reinforced with multifunctional additives possessing bonding and stress-buffering capabilities, which effectively alleviated residual tensile stress, leading to a significant enhancement of mechanical strength. The obtained perovskite-polymer composite detector exhibits a high sensitivity of 2.51 × 10⁴ μC Gy_air⁻¹ cm⁻², excellent pixel-level uniformity with a low photo-response non-uniformity (PRNU) value of 1.85 % and a high spatial resolution of 0.57 line pairs per pixel (lp pix⁻¹). This approach provides valuable guidance for perovskite-based X-ray imaging.

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用于 X 射线平板成像的可控印刷过氧化物厚膜

卤化物钙钛矿在x射线成像应用中显示出巨大的潜力。然而，在将这些材料与像素化阵列读出电路无缝集成以及确保足够的衰减以进行直接x射线探测成像方面，仍然存在重大挑战。在这项研究中，我们提出了一种可靠的方法，包括操作结晶动力学，流变学工程和颗粒间交联策略，以制备数百微米尺度的坚固可调钙钛矿-聚合物复合材料（PPC）薄膜。加入具有粘接和应力缓冲能力的多功能添加剂对PPC薄膜进行增强，有效地缓解了残余拉伸应力，机械强度显著提高。所制备的钙钛矿-聚合物复合探测器具有2.51 × 104 μC Gyair−1 cm−2的高灵敏度，良好的像素级均匀性，低光响应非均匀性（PRNU）值为1.85 %，高空间分辨率为0.57线对/像素（lp pix−1）。这种方法为基于钙钛矿的x射线成像提供了有价值的指导。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.