Open Access

ARTICLE

Sonochemically synthesised nitrogen-doped CdS nanoparticles for photovoltaic applications

S. R. Ahmed^a,*, M. V. V. K. Srinivas Prasad^b, K. Keerthivasan^c

a Department of Physics, Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, Guntur District, A.P, PIN CODE: 522502, India.
b Department of Physics, Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram, Guntur District, A.P, PIN CODE: 522502, India.
c Department of Electrical Engineering, University of Technology and Applied Sciences PO Box 74. AlKhuwair, Muscat Sultanate of Oman.

* Corresponding Author:

Chalcogenide Letters 2025, 22(8), 679-691. https://doi.org/10.15251/CL.2025.228.679

Received 28 December 2024; Accepted 05 August 2025;

Abstract

This work used a sonication-aided approach to make Cadmium sulfide nanoparticles and Nitrogen-doped CdS nanoparticles. Doping Nitrogen into CdS NPs enhances the material's electrical, chemical, and structural properties by altering its surface area and functional sites. XRD, FTIR, SEM/EDX, TGA, UV-Vis, and PSA are used to evaluate the characteristic features of CdS NPs. The photovoltaic responses of the prepared CdS and CdS-N NPs were evaluated by electrochemical impedance and IV analysis. The obtained XRD data confirms that nitrogen doping significantly changes the crystal size of CdS NPs. The XPS spectrum depicts the presence of trace elements and confirms the nitrogen doping with CdS. The absorption spectra and band gap values derived from UV data demonstrate that nitrogen doping improves the optical characteristics of CdS NPs in the long run. CdS thin film photoanodes show improved photoresponse, even at such low bias voltages, according to the electrical characterisations.

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Keywords

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