Optical and structural characterization of CdS/ZnS and CdS:Cu²⁺/ZnS core–shell nanoparticles

Abstract

Core-shell CdS/ZnS (Zn 0.025-0.125 M) and CdS:Cu(2+) (1%)/ZnS nanoparticles were successfully synthesized using a chemical method. X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR TEM), photoluminescence (PL) and UV/Visible (UV/Vis) techniques were used to characterize the novel CdS/ZnS and CdS:Cu(2+) /ZnS core-shell nanoparticles. All absorption peaks of the synthesized samples were highly blue-shifted from the bulk CdS and ZnS. Very narrow and symmetric PL emission was observed in the yellow region for core-shell CdS/ZnS. Furthermore, the PL emission of CdS/ZnS was tuned into orange region by incorporate the Cu ion into the core CdS lattice.

Efficient CdS Nanoparticle/Zn(OH)F Heterojunction Catalysts for Hydrogen Evolution

“…RZF (0.3 g) was added to stir for 1 h, then transferred to the 100 mL Teflon-lined autoclave and reacted at 140 °C for 6 h. Subsequently, it was naturally cooled to room temperature, and the yellow solid powder was washed with deionized water three times and dried under vacuum at 80 °C for 30 min. Finally, the different weight ratios (16% CdS, 26% CdS, 35% CdS, and 42% CdS) of the CdS/RZF catalysts are obtained. − The CdS NP/FZF and CdS NP/NZF were obtained by the same method.…”

Optical Dynamics of Copper-Doped Cadmium Sulfide (CdS) and Zinc Sulfide (ZnS) Quantum-Dots Core/Shell Nanocrystals

“…CdS/ZnS core/shell QDs are suitable for high luminescence intensity and chemical stability [37]. CdS and ZnS have direct bandgap energies of 2.9 and 4.8 eV, respectively, at room temperature [38]. Moreover, Cd +2 and Zn +2 have the same ionic charge and not too dissimilar radii.…”

Optimization of Plastic Scintillator for Detection of Gamma-Rays: Simulation and Experimental Study

“…For example, CdS is one of the II-VI semiconductors and has a bandgap of about 2.42 eV. Recently, core/shell type composite quantum dots have been studied in optoelectronic applications [6][7][8]. In particular, it has been reported that quantum dots covered with inorganic materials such as CdSe/ZnS, CdS/ZnS, and CdSe/CdS have improved emission efficiency.…”

“…Quantum dots with a core/shell structure can change their physical/optical properties through particle size or bandgap control. Therefore, quantum dots have the advantage of forming stable scintillation [6][7][8][9][10][11][12][13].…”