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Photoactivation of Ag ions for improved WO3-based optoelectronic devices

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Abstract

In this research, the performance of two different photodetectors, Al/WO3/p-Si and Al/Ag@WO3/p-Si, was compared. The monoclinic structure was evaluated using X-ray diffraction. A surface morphology using FE-SEM, utilizing an atomic force microscope to analyze the surface topography in terms of RMS and average roughness, and the X-ray spectra showed the existence of the elements W, Ag, and O. During a 35-s immersion, the produced films had the greatest absorbance and lowest energy gap. The thickness of the deposited nanofilms was as follows: 125 nm for the pure WO3, 160 nm at 5 s, 420 nm at 15 s, 165 nm at 25 s, 70 nm at 35 s, and 225 nm at 45 s. The ideality factor, barrier height, and conductivity values for Ag@WO3/p-Si were (0.86, 3.07), and the greatest conductivity, respectively, was found at the immersion period of 35 s, according to the study of DC I-V. The build-in potential and depletion area width of Ag@WO3/p-Si devices were (0.7, 12.2 × 105 cm), and the responsivity and detectivity at a wavelength of (425) nm of Al/Ag@WO3/p-Si were (0.31 A W-1) and (1.3281010 Jones), respectively, according to the C-V observations.

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Data availability

The datasets used and/or analyzed during the current study are available from the corresponding authors, “M. A. Fakhri, E. T. Salim,” on reasonable request.

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Acknowledgements

The authors would like to thank the department of laser engineering and electro-optic/University of Technology for the logistic support of this work.

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Authors and Affiliations

  1. Applied Science Department, University of Technology- Iraq, Baghdad, Iraq

    Evan T. Salim, Azhar I. Hassan & Farhan A. Mohamed

  2. Laser and Optoelectronic Department, University of Technology- Iraq, Baghdad, Iraq

    Makram A. Fakhri

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  1. Evan T. Salim
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  2. Azhar I. Hassan
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  3. Farhan A. Mohamed
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  4. Makram A. Fakhri
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Evan and Azhar conceived of the presented idea. Evan and Azhar supervised the finding of this work. All authors discussed the results and contributed equally to the final manuscript. Farhan and Makram conducted the experiments. All authors provided critical feedback and helped shape the research, analysis, and manuscript.

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Salim, E.T., Hassan, A.I., Mohamed, F.A. et al. Photoactivation of Ag ions for improved WO3-based optoelectronic devices. J Opt (2024). https://doi.org/10.1007/s12596-023-01596-x

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