Abstract
In this study, the polyaniline/multiwalled carbon nanotubes–copper sulfide nanoparticles (PANI/MWCNTs–CuS NPs) hybrid composite-based thin films were deposited on top of FTO coated glass substrate for IR (infrared) detection. These hybrid composites were synthesized using in-situ oxidative polymerization of aniline monomer with MWCNTs–CuS NPs mixed in. The samples were prepared using MWCNTs–CuS NPs hybrids with different CuS NPs content. The successful synthesis of these composites was confirmed using Scanning Electron Microscopy (SEM), X-ray powder diffraction (XRD), Raman spectroscopy, and UV–Vis Spectroscopy. The effect of CuS content on the photo-detecting ability of these composite films was investigated. This was done by measuring the ohmic behavior of these composite films. Their J–V behavior in dark as well as under constant exposure to 850 nm infrared light was measured. Increase in CuS content in these composites clearly enhanced their IR light detectability which is attributed to the reduction in composite’s band gap. The ohmic resistance also decreased significantly with increased CuS content (both in dark and under illumination). However, beyond a threshold level of added CuS content, their ohmic resistance suddenly started to rise again along with their decreased photo-detectability.
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Acknowledgements
This research was conducted at the School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology, Sector H-12, Islamabad. ZH acknowledges the financial and administrative support from the SCME, NUST as well as support of National Centre for Physics for I–V characterization of the samples.
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RZ: Methodology, Writing—original draft, Investigation, Characterization. MTM: review & editing, Characterization. ZH: Conceptualization, supervision, reviewing of manuscript. UL: Supervision, administrative support. SIJ/SH: Financial support, fabrication of electrodes, characterization of samples. ZAU: Characterization and Validation.
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Band gap data, Raman analysis of MWCNTs for ID/IG ratio calculation, Eds of MWCNTs–CuS NPs hybrids and composition of CuS NPs along their spectra can be found in the attached supplementary file. Supplementary material 1 (DOCX 452.0 kb)
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Zia, R., Masood, M.T., Hussain, Z. et al. Multiwalled CNTs/copper sulfide hybrids embedded in polyaniline thin films for near-infrared (NIR) photo detecting applications. J Mater Sci: Mater Electron 34, 1622 (2023). https://doi.org/10.1007/s10854-023-11035-z
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DOI: https://doi.org/10.1007/s10854-023-11035-z