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Electrochemical synthesis of S-doped Sb2Se3 nanostructures and photo-switching behaviour

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Abstract

In this research, effect of different concentrations of sulfur (S) dopant is investigated in order to study the physical properties of nanostructured antimony selenide (Sb2Se3) films. The films were prepared by the electrodeposition method. The X-ray diffraction patterns confirmed the formation of orthorhombic Sb2Se3 polycrystalline films. The field emission scanning electron microscope images showed the formation of nanoscale particles on the surface of the films and changed their size by sulfur dopant. Electrical characterization of the fabricated devices using the Sb2Se3 films indicated an increase in trap-filled limited voltage (VTFL), the density of the trap densities and the density of electric carriers (from 2.17 × 10+16 cm−3 in the un-doped sample to 5.63 × 10+ 18 cm−3 in the S-doped sample). Characterization of the fabricated devices as photodetectors showed that S concentrations increased the intensity of photocurrent by ~ 9 times in the best sample compared to the un-doped sample. Also, it was found that sensitivity from 317 to 2900%, gain from 218 to 2499, responsivity from 0.0095 to 0.1083 mA/W, and specific detectivity from 1.02 × 10+9 to 1.16 × 10+10 Jones of the un-doped sample reached its maximum possible value with increasing doping in the sample with maximum S concentration.

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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

F. Jamali-Sheini acknowledges the financial and instrumentation support of Ahvaz Branch, Islamic Azad University, Ahvaz, Iran and Advanced Surface Engineering and Nano Materials Research Center, Ahvaz Branch, Islamic Azad University, Ahvaz, Ahvaz, Iran in this research work, respectively.

Funding

B. Baghbanzadeh-Dezfuli acknowledged the Iran High-Tech Laboratory Network [Grant Number: 16516] for financial support in the characterization of samples.

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BB-D carried out all the film deposition, characterization, and prepared the original draft of the manuscript. FJ-S supervised the overall project, review and editing the manuscript. MC advised the overall project. All authors discussed the results and approved the submission.

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Correspondence to Farid Jamali-Sheini.

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Baghbanzadeh-Dezfuli, B., Jamali-Sheini, F. & Cheraghizade, M. Electrochemical synthesis of S-doped Sb2Se3 nanostructures and photo-switching behaviour. Opt Quant Electron 55, 4 (2023). https://doi.org/10.1007/s11082-022-04246-x

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  • DOI: https://doi.org/10.1007/s11082-022-04246-x

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