Structural, optical, and electronic characteristics of non-stoichiometric nanocadmium sulfide

Samples of non-stoichiometric nano-CdS1−x were synthesized by a simple thermolysis method lowering the ratio thiourea relative to cadmium acetate as starting precursors: Cd(Ac):(1 − x) (x = 0.0, 0.03, 0.05, and 0.1). X’pert HighScore Plus program manifested biphasic CdS (cubic hexagonal), Rietveld analysis was utilized match structural microstructure parameters formed samples. The possibility CdS1−xOx alloy due sulfur deficiency is also examined using method. A high-resolution transmission electron microscope imaging exhibited nanosize particles with homogeneous morphology. Fourier transform infrared spectrometer confirm existence O2 in CdS1−x matrix. band-gap energies for are reduced below values energy gaps CdO upon increasing parameter (x) forming “bowing.” photoluminescence (PL) emitted visible colors depending on amount excitation wavelength used. maximum PL intensity observed CdS0.9 sample confirmed presents oxygen inside influence substitution or vacancies electronic structure optical features investigated applying density function calculations.