Facile Phase Control of Solution-Processed Copper Iron Sulfide Nanocrystals for a Low-Cost Self-Powered NIR Photodetector with Fast ResponseClick to copy article linkArticle link copied!
- Xiang MengXiang MengDepartment of Mathematics and Physics, Chongqing University of Posts and Telecommunications, 2 Chongwen Road, Chongqing 400065, ChinaSchool of Material Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaMore by Xiang Meng
- Xiaolong JingXiaolong JingSchool of Material Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaThe Institute of Chemical and Gas and Oil Technologies, T.F. Gorbachev Kuzbass State Technical University, 28, Vesennyaya Street, Kemerovo 650000, RussiaMore by Xiaolong Jing
- Jiang ChengJiang ChengSchool of Material Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaMore by Jiang Cheng
- Hua TangHua TangSchool of Material Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaMore by Hua Tang
- Xihao ChenXihao ChenSchool of Material Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaMore by Xihao Chen
- Xianju Zhou*Xianju Zhou*Email: [email protected]Department of Mathematics and Physics, Chongqing University of Posts and Telecommunications, 2 Chongwen Road, Chongqing 400065, ChinaMore by Xianju Zhou
- Lu Li*Lu Li*Email: [email protected]School of Material Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, ChinaMore by Lu Li
Abstract
Phase control of nanomaterials, determined by thermodynamic or kinetic conditions, is essential to sulfides’ characteristics, offering opportunities for exploring advanced applications in the field of optoelectronics. However, the one-step, high-yield, and defect-free synthesis of phase-pure nanoscale sulfides remains challenging. In this work, the low-cost solvothermal process enabled precise regulation of the phase evolution process to synthesize the expected sulfide (three phases in the Cu–Fe–S system) nanocrystals in a phase-pure form at low temperatures. These nanocrystals exhibited broadband photoabsorption ranging from the visible to the near-infrared (NIR) region. Subsequently, a solution-processed uniform CuFeS2 nanocrystal film was deposited on CdS by the same one-step route to create the first CuFeS2-based self-powered NIR photodetector. These devices demonstrated a superior stable and reproducible detection performance without bias voltage under NIR illumination, even up to 1050 nm, resulting from their suitable size. The rapid rise and decay times of ∼38 and ∼49 ms indicated that the devices are capable of high-frequency switching detection. Moreover, detailed chemical processes through accurately tuning the oxidation states, the influence of CuFeS2 nanoparticle size, phase control, and film thickness on performance were proposed in detail.
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This article is cited by 5 publications.
- Bhoomi S. Shah, Jiten P. Tailor, Sunil H. Chaki, M. P. Deshpande. Comparative study of different perovskites with the utilization of CuFeS2 as an efficient hole transport material for enhancing solar cell efficiency. Journal of Optics 2025, 4 https://doi.org/10.1007/s12596-025-02628-4
- Safaa H. Ali, Saad S. Mohammed. EFFECT OF ANNEALING TEMPERATURE ON THE STRUCTURAL AND THERMOELECTRIC PROPERTIES OF CuFeS2 NANOPARTICLES PREPARED BY THE HYDROTHERMAL METHOD. MOMENTO 2025,
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- R. V. Borisov, M. N. Likhatski, S. A. Vorobyev, A. M. Zhizhaev, E. V. Tomashevich. Formation of Layered Sulfide–Hydroxide (Valleriite) Materials under Hydrothermal Conditions. Inorganic Materials 2024, 60
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- Bhoomi S. Shah, Sunil H. Chaki, Sandip V. Bhatt, M.P. Deshpande. Flexible photodetector for broadband detection using wurtzite phase CuFeS2 nanoparticles. Materials Science in Semiconductor Processing 2024, 179 , 108495. https://doi.org/10.1016/j.mssp.2024.108495
- Xiang Meng, Junjie Xu, Guiping Zhao, LiuYang Zhang, Jiang Cheng, Yong Pu, Wen Li, Lu Li. Phase control of sulfide nanocrystals from thiourea-mediated solution. Journal of Alloys and Compounds 2024, 992 , 174590. https://doi.org/10.1016/j.jallcom.2024.174590
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