FeS quantum dots: preparation, structure and optical properties

Taiwei Zhang; Kun Hu; Guobin Li; Yiping Xia; Ao Yang; Xueming Li; Libin Tang; Kar Seng Teng

doi:10.1117/12.3023580

18 March 2024 FeS quantum dots: preparation, structure and optical properties

Taiwei Zhang, Kun Hu, Guobin Li, Yiping Xia, Ao Yang, Xueming Li, Libin Tang, Kar Seng Teng

Proceedings Volume 13104, Advanced Fiber Laser Conference (AFL2023); 131044F (2024) https://doi.org/10.1117/12.3023580
Event: Advanced Fiber Laser Conference (AFL2023), 2023, Shenzhen, China

Abstract

Transition metal chalcogenides (TMCs) have wide-ranging applications in nanoelectronics and optoelectronics due to their unique energy band structure and excellent properties. Iron(Ⅱ) sulfide quantum dots (FeS QDs) are environmentally friendly semiconductor material and exhibit excellent near-infrared properties because of their narrow bandgap, which is essential for infrared detectors. In this paper, FeS QDs were prepared by liquid phase ultrasonic exfoliation and the solution of FeS QDs was spin-coated on a quartz substrate to form a film. The morphology, structural and optical properties of FeS QDs solutions and films were studied. FeS QDs demonstrated good dispersion with average particle size and height of approximately 11.7 and 10.4 nm, respectively. The calculated average particle size of FeS QDs was 12.7 nm using the Debye-Scherrer formula, which is in good agreement with the TEM characterization. The ultraviolet-visible-near infrared (UV-Vis-NIR) characterization of the FeS QDs solutions and films exhibited obvious absorption in the ultraviolet to near-infrared wavelength band, and the absorption was stable in the near-infrared wavelength band. The photoluminescence (PL) characterization of the FeS QDs solutions and films revealed luminescence properties in the near-infrared wavelength band, and the peak position appeared to be red-shifted with an increase in excitation wavelength, which suggests excitation wavelength-dependent luminescence properties. The FeS QDs exhibit good infrared characteristics and can potentially be used in infrared photovoltaic and photodetector.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Taiwei Zhang, Kun Hu, Guobin Li, Yiping Xia, Ao Yang, Xueming Li, Libin Tang, and Kar Seng Teng "FeS quantum dots: preparation, structure and optical properties", Proc. SPIE 13104, Advanced Fiber Laser Conference (AFL2023), 131044F (18 March 2024); https://doi.org/10.1117/12.3023580

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