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journal article·2024-09Open access

High‐sensitive and fast MXene/silicon photodetector for single‐pixel X‐ray imaging

Yance Chen, Yue Dai, Srikrishna Chanakya Bodepudi, Xinyu Liu, Yuan Ma, Shiyu Xing, Dawei Di, Feng Tian, Xin Ming, Yingjun Liu, Kai Pang, Fei Xue, Yunyan Zhang, Zexin Yu, Yaping Dan, Oleksiy V. Penkov, Yishu Zhang, Dianyu Qi, Wenzhang Fang, Yang Xu, Chao Gao

InfoMat· Volume 6· Issue 9
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Abstract

Abstract The demand for high‐performance X‐ray detectors leads to material innovation for efficient photoelectric conversion and carrier transfer. However, current X‐ray detectors are often susceptible to chemical and irradiation instability, complex fabrication processes, hazardous components, and difficult compatibility. Here, we investigate a two‐dimensional (2D) material with a relatively low atomic number, Ti3C2Tx MXenes, and single crystal silicon for X‐ray detection and single‐pixel imaging (SPI). We fabricate a Ti3C2Tx MXene/Si X‐ray detector demonstrating remarkable optoelectronic performance. This detector exhibits a sensitivity of 1.2 × 107 μC Gyair−1 cm−2, a fast response speed with a rise time of 31 μs, and an incredibly low detection limit of 2.85 nGyair s−1. These superior performances are attributed to the unique charge coupling behavior under X‐ray irradiation via intrinsic polaron formation. The device remains stable even after 50 continuous hours of high‐dose X‐ray irradiation. Our device fabrication process is compatible with silicon‐based semiconductor technology. Our work suggests new directions for eco‐friendly X‐ray detectors and low‐radiation imaging system. image
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Research context

Electronic materials

OpenAlex topics: MXene and MAX Phase Materials · Graphene research and applications · 2D Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Integrated Circuits, ZJU‐Hangzhou Global Scientific and Technological Innovation Center, State Key Laboratory of Silicon Materials Zhejiang University Hangzhou People's Republic of China

MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, International Research Center for X Polymers Zhejiang University Hangzhou People's Republic of China

State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, International Research Center for Advanced Photonics Zhejiang University Hangzhou People's Republic of China

Institute for Manufacturing Technologies of Ceramic Components and Composites (IMTCCC), University of Stuttgart Stuttgart Germany

University of Michigan‐Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University Shanghai People's Republic of China

ZJU‐UIUC Institute, International Campus, Zhejiang University Haining People's Republic of China

Zhejiang ICsprout Semiconductor Co., Ltd Hangzhou People's Republic of China

Funding

National Natural Science Foundation of China · National Key Research and Development Program of China · Fundamental Research Funds for the Central Universities

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