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The impact of Au-decorated TiO2 nanoparticles on high performance and low 1/f noise in UV photodetector

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Abstract

In this study, a high-performance ultraviolet photodetector (UVPD) was elaborated using Cu/Au/TiO2/InGa structure. The chemically synthesized TiO2 nanoparticles (NPs) decorated with plasmonic Au NPs were prepared using the solvothermal synthesis route. Different characterization techniques in particular X-ray diffraction, transmission electron microscopy, high-resolution TEM, selected area electron diffraction, energy-dispersive X-ray fluorescence, diffuse reflectance, and photoluminescence are employed in this research. The dielectric characteristics have been emphasized the frequency and bias voltage effects on electric responses through dielectric measurement. The results revealed that Au-decorated TiO2 NPs present a giant permittivity and low dielectric loss. It was found that nanocomposites exhibited obvious photocurrent responses under illumination. The performance of our device was investigated by exposing it to a laser illumination wavelength of 375nm and at − 1 V. Under an intensity of 7.6mW, our UVPD exhibited a high responsivity of about 100A/W and a huge detectivity of 3.5 × 1014 Jones leads to a low noise equivalent power of 3.44 × 10–13 W.Hz−1/2. Furthermore, the rise time/the recovery time were 0.96 and 9.6 s, respectively. These results indicate that the Au-decorated TiO2 possesses significant photoelectric properties which can be exploited for the prospective photodetection application.

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Acknowledgements

Taif University Researchers Supporting Project number (TURSP-2020/28), Taif University, Taif, Saudi Arabia.

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Authors and Affiliations

  1. Laboratory of Energy and Materials (LabEM-LR11ES34), Higher School of Science and Technology of Hammam Sousse, University of Sousse, ESSTHS, Street Lamine Abbassi, 4011, Hammam Sousse, Tunisia

    Fatma Ben Amor & Ridha Ajjel

  2. Higher Institute of Computer Science and Communication Technologies of Hammam Sousse, University of Sousse, ISITCom, Gp1, 4011, Hammam Sousse, Tunisia

    Nejeh Hamdaoui

  3. Department of Chemistry, College of Science, Taief University, P.O.Box 11099, Taif, 21944, Saudi Arabia

    Amine Mezni

  4. Departement of Physics, College of Sciences and Arts at Ar Rass, Qassim University, Ar Rass, Saudi Arabia

    Lotfi Beji

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  1. Fatma Ben Amor
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Ben Amor, F., Hamdaoui, N., Mezni, A. et al. The impact of Au-decorated TiO2 nanoparticles on high performance and low 1/f noise in UV photodetector. J Mater Sci: Mater Electron 32, 27107–27120 (2021). https://doi.org/10.1007/s10854-021-07081-0

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