使用低暗电流中等带隙聚合物馈源的有机 X 射线图像传感器

IF 13 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Energy & Environmental Materials Pub Date : 2024-05-09 DOI:10.1002/eem2.12750
Jong-Woon Ha, Seung Hun Eom, Bo Kyung Cha, Seyeong Song, Hyeong Ju Eun, Jong H. Kim, Jong Mok Park, BongSoo Kim, Byoungwook Park, Seo-Jin Ko, Sung Cheol Yoon, Changjin Lee, In Hwan Jung, Do-Hoon Hwang
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引用次数: 0

摘要

开发便携式 X 射线探测器对于在紧急情况下诊断昏迷病人的骨折十分必要。然而,由于闪烁体和硅光电探测器的重量很重,这一点颇具挑战性。用有机光电探测器取代硅层可以减轻 X 射线探测器的重量和厚度。本研究提出了一种新型的双噻吩并吡喃二酮聚合物供体,由于双噻吩并吡喃二酮的对称骨架和高溶解性分子结构,即使在很厚的光活性层(约 700 纳米)中也能表现出优异的光探测性能。在负偏压(-2.0 V)条件下,双噻吩并吡咯二酮聚合物供体能够强力抑制暗电流密度(Jd ~ 10-10 A cm-2),同时即使在 700 nm 厚度条件下也能保持高响应率(R = 0.29 A W-1),因此有机光电探测器的最大射噪限制比检测率为 Dsh* = 2.18 × 1013 Jones。通过槽模涂层开发出了用于 X 射线探测器的印刷有机光电探测器,其 Dsh* = 2.73 × 1012 琼斯,在 X 射线照射下具有清晰的上升(0.26 秒)和下降(0.29 秒)响应时间。X 射线探测器的线性响应也证明了探测的可靠性,X 射线探测极限为 3 mA。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Organic X-Ray Image Sensors Using a Medium Bandgap Polymer Donor with Low Dark Current

The development of portable X-ray detectors is necessary for diagnosing fractures in unconscious patients in emergency situations. However, this is quite challenging because of the heavy weight of the scintillator and silicon photodetectors. The weight and thickness of X-ray detectors can be reduced by replacing the silicon layer with an organic photodetectors. This study presents a novel bithienopyrroledione-based polymer donor that exhibits excellent photodetection properties even in a thick photoactive layer (~700 nm), owing to the symmetric backbone and highly soluble molecular structure of bithienopyrroledione. The ability of bithienopyrroledione-based polymer donor to strongly suppress the dark current density (Jd ~ 10−10 A cm−2) at a negative bias (−2.0 V) while maintaining high responsivity (R = 0.29 A W−1) even at a thickness of 700 nm results in a maximum shot-noise-limited specific detectivity of Dsh* = 2.18 × 1013 Jones in the organic photodetectors. Printed organic photodetectors are developed by slot-die coating for use in X-ray detectors, which exhibit Dsh* = 2.73 × 1012 Jones with clear rising (0.26 s) and falling (0.29 s) response times upon X-ray irradiation. Detection reliability is also proven by linear response of the X-ray detector, and the X-ray detection limit is 3 mA.

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来源期刊
Energy & Environmental Materials
Energy & Environmental Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
17.60
自引率
6.00%
发文量
66
期刊介绍: Energy & Environmental Materials (EEM) is an international journal published by Zhengzhou University in collaboration with John Wiley & Sons, Inc. The journal aims to publish high quality research related to materials for energy harvesting, conversion, storage, and transport, as well as for creating a cleaner environment. EEM welcomes research work of significant general interest that has a high impact on society-relevant technological advances. The scope of the journal is intentionally broad, recognizing the complexity of issues and challenges related to energy and environmental materials. Therefore, interdisciplinary work across basic science and engineering disciplines is particularly encouraged. The areas covered by the journal include, but are not limited to, materials and composites for photovoltaics and photoelectrochemistry, bioprocessing, batteries, fuel cells, supercapacitors, clean air, and devices with multifunctionality. The readership of the journal includes chemical, physical, biological, materials, and environmental scientists and engineers from academia, industry, and policy-making.
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