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18 March 2024 Preparation and optical properties of Br-doped GQDs
Qian Zhang, Libin Tang, Kar Seng Teng, Yanfei Lü
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Proceedings Volume 13104, Advanced Fiber Laser Conference (AFL2023); 131044G (2024) https://doi.org/10.1117/12.3023582
Event: Advanced Fiber Laser Conference (AFL2023), 2023, Shenzhen, China
Abstract
In this work, two-dimensional graphene oxide (GO) (e.g., oxygenated graphene sheets with epoxy, hydroxyl, and carboxyl groups) was reduced to zero-dimensional Br-doped GO quantum dots (Br-GODs) using a one-step method. The GO, which exhibits poor electrical conductivity, was reduced to Br-GODs using hydrobromic acid as a bromine source and reducing agent during hydrothermal reaction. The morphology, structural and photoelectric properties of GO and Br- GODs were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible near infrared (UV-Vis-NIR) absorption spectroscopy, photoluminescence (PL), photoluminescence emission (PLE), Fourier transform infrared (FTIR) spectroscopy and atomic force microscopy (AFM). A photodetector based on Br-GODs material, consisting of interdigitated electrodes, was prepared. The responsivity (R) and detectivity (D*) of the photodetector can reach a maximum of 0.54 A/W and 4.33 × 1013 Jones, respectively, under 850 nm illumination.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Qian Zhang, Libin Tang, Kar Seng Teng, and Yanfei Lü "Preparation and optical properties of Br-doped GQDs", Proc. SPIE 13104, Advanced Fiber Laser Conference (AFL2023), 131044G (18 March 2024); https://doi.org/10.1117/12.3023582
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KEYWORDS
Graphite oxide
Photodetectors
Bromine
X-ray photoelectron spectroscopy
Optical properties
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