Abstract
Photodetectors operating in the shortwave infrared region are of great significance due to their extensive applications in both commercial and military fields. Narrowbandgap two-dimensional layered materials (2DLMs) are considered as the promising candidates for constructing next-generation high-performance infrared photodetectors. Nevertheless, the performance of 2DLMs-based photodetectors can hardly satisfy the requirements of practical applications due to their weak optical absorption. In the present study, a strategy was proposed to design high-performance shortwave infrared photodetectors by integrating metal-organic frameworks (MOFs) nanoparticles with excellent optical absorption characteristics and 2DLM with high mobility. Further, this study demonstrated the practicability of this strategy in a MOF/2DLM (Ni-CAT-1/Bi2Se3) hybrid heterojunction photodetector. Due to the transfer of photo-generated carriers from the MOF to Bi2Se3, the MOF nanoparticles integrated on the Bi2Se3 layer can increase the photocurrent by 2–3 orders of magnitude. The resulting photodetector presented a high responsivity of 4725 AW−1 and a superior detectivity of 3.5 × 1013 Jones at 1500 nm. The outstanding performance of the hybrid heterojunction arises from the synergistic function of the enhanced optical absorption and photogating effect. In addition, the proposed device construction strategy combining MOF photosensitive materials with 2DLMs shows a high potential for the future high-performance shortwave infrared photodetectors.
摘要
工作在短波红外区域的光电探测器因其在商业和军事领域的广泛应用而备受重视, 窄带隙二维层状材料(2DLM)被认为是构筑下一代高性能红外光电探测器的潜在候选者. 然而, 这类材料在原子级厚度时光吸收较弱, 致使其探测性能难以满足实际需求. 在本文中, 我们提出了一种通过集成具有优异光吸收特性的金属有机骨架(MOF)纳米粒子和高迁移率的2DLM来设计高性能短波红外光电探测器的策略, 并通过构筑MOF/2DLM(Ni-CAT-1/Bi2Se3)混合异质结光电探测器演示了该策略的可行性. 由于光生载流子从MOF转移到Bi2Se3, 集成在Bi2Se3 层上的MOF纳米颗粒使异质结的光电流增加了2–3个数量级. 该混合异质结光电探测器在1500 nm光照下的响应度和探测度分别达4725 A W−1和3.5 × 1013 Jones. 如此优异性能主要源于增强的光吸收和光门控效应的协同作用. 本文提出的集成MOF光敏材料和2DLM的策略为未来构建高性能短波红外光电探测器提供了思路.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (21825103 and 51727809), the Natural Science Foundation of Hubei Province (2019CFA002), the Fundamental Research Funds for the Central Universities (2019kfyXMBZ018) and China Postdoctoral Science Foundation (2021M691108). The authors thank the Analytical and Testing Centre of Huazhong University of Science and Technology.
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Author contributions Wang F and Zhang N performed the growth of 2D Bi2Se3 flakes. Wang F and Wu J fabricated the Bi2Se3/Ni-CAT-1 hybrid heterojunctions. Zhang Y did the AFM measurement. Wang F performed the properties characterization, device tests and manuscript writing. Zhai T supervised the project. Wang F, Yang S, Li H and Zhai T discussed the manuscript and revision.
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Fakun Wang received his BSc degree in mineral processing engineering from the Central South University in 2016. He is studying for his PhD degree at Huazhong University and Technology (HUST) under the supervision of Professor Tianyou Zhai. His work focuses on the controllable synthesis of low-dimensional inorganic materials, and their promising applications in optoelectronics
Tianyou Zhai received his BSc degree in chemistry from Zhengzhou University in 2003, and PhD degree in physical chemistry from the Institute of Chemistry, Chinese Academy of Sciences (ICCAS) under the supervision of Prof. Jiannian Yao in 2008. Afterwards he joined in the National Institute for Materials Science (NIMS) as a postdoctoral fellow of Japan Society for the Promotion of Science (JSPS) in Prof. Yoshio Bando’s group and then as a researcher of the International Center for Young Scientists (ICYS) within NIMS. Currently, he is a chief professor of the School of Materials Science and Engineering, HUST. His research interests include the controlled synthesis and exploration of fundamental physical properties of inorganic functional nanomaterials, as well as their promising applications in energy science, electronics and optoelectronics
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Wang, F., Wu, J., Zhang, Y. et al. High-sensitivity shortwave infrared photodetectors of metal-organic frameworks integrated on 2D layered materials. Sci. China Mater. 65, 451–459 (2022). https://doi.org/10.1007/s40843-021-1781-y
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DOI: https://doi.org/10.1007/s40843-021-1781-y