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ARTICLE

Optimizing the structure, morphological and optical properties of Co-doped CDS, nanoparticles synthesized at various doping concentration and design sensors for optimal application

R. Rajeev^a,b,*, C. M. S. Negi^a

a Department of Physical Sciences, Banasthali Vidyapith-304022, Rajasthan,India
b Department of Electronics and Communication Engineering, Birla Institute ofTechnology Mesra, Patna Campus, Patna-800014, India

* Corresponding Author:

Chalcogenide Letters 2025, 22(5), 469-480. https://doi.org/10.15251/CL.2025.225.469

Received 28 February 2025; Accepted 14 May 2025;

Abstract

Cobalt-doped cadmium sulphide nanoparticles of semiconductors (CDs: Co NPs) were synthesised using various cobalt concentrations utilising a microwave-assisted approach. Debye-Scherer equation revealed the nanoparticles' size range to be between 2 and 4 nm. Diffraction from X-rays revealed a zinc mix structure. According to the structure in the optical bandgap energies indicates that, doping has systematically raised the bandgap energy as the doping concentration raises. The composition of the nanoparticles which was verified by EDAX, validated the effective integration of cobalt into the CdS structure. The detection of different functional and vibrational groups was performed at room temperature over a 400-4000 cm1 range using Fourier Transform Infrared Spectroscopy (FTIR). Comprehensive structural data including shape of nanoparticles and lattice characteristics were provided by HRTEM. Cobalt-doped cadmium Sulphide (CdS: Co) is a feasible material for optoelectronic sensors, due to its improved light response capabilities and configurable bandgap.The present research intends to optimize the structural and optoelectronic characteristics of CdS: Co through controlled doping and fabrication processes to create customized bandgap and to design sensors for appropriate use in a variety of spectrum areas.

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