Abstract
The investigation thoroughly analyzes undoped and Se-doped CdS nanostructures using multiple techniques. Elemental composition analysis via EDS showed pure Cd and S in the undoped sample, while successful Se incorporation was confirmed in Se-doped samples. XRD revealed distinct CdS phases, with reduced intensity and broadening after Se-doping, indicating lower crystalline quality. The (111) peak shift confirmed Se substitution in the CdS lattice. Williamson-Hall and Monshi-Scherrer analyses demonstrated smaller crystallite sizes and increased lattice strain after Se-doping. FESEM displayed smaller grain sizes after Se-doping. PL analyses showed diminished crystalline quality and reduced intensity. UV–Vis indicated increased absorption and reduced transmission after Se-doping. Bandgap energy declined due to Se-doping and potential CdSe phase formation. Raman spectroscopy confirmed reduced crystalline quality. Se-doping enhances photon absorption, potentially improving optical properties for diverse applications. The study provides a detailed assessment of Se-doped CdS nanostructures, highlighting structural, optical, and morphological changes, valuable for various technological applications.
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