Abstract:
Nanopowders of zinc sulfide (ZnS) and ZnS/Ag$_{2}$S heteronanostructures were synthesized by chemical deposition from aqueous solutions. A change in the ratio between the concentrations of reagents allowed us to obtain ZnS nanopowders with a particle mean size from 2 to 10 nm. The Ag$_{2}$S nanoparticle size in the resulting heteronanostructures was 9–30 nm and the ZnS surface layer thickness was equal to 4–5 nm. The diffuse reflectance spectra for nanostructured ZnS and ZnS/Ag$_{2}$S heteronanostructures were measured. Based on the analysis of the obtained spectra, the bandgap energy $E_g$ in the studied sulfide nanostructures was estimated. Upon a decrease in the nanoparticle size from 10 to 2 nm, the $E_g$ value in ZnS nanopowders increased in a range of 3.17–3.36 eV. An increase in the content of Ag$_{2}$S in the ZnS/Ag$_{2}$S heteronanostructures led to a decrease in the bandgap energy and a decrease in the luminescence intensity.
This work was performed under financial support from the Russian Science Foundation (project no. 19-79-10101) at the Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences.
Citation:
S. I. Sadovnikov, I. D. Popov, “Optical properties of zinc sulfide nanopowders and ZnS/Ag$_{2}$S heteronanostructures”, Fizika Tverdogo Tela, 62:11 (2020), 1787–1794; Phys. Solid State, 62:11 (2020), 2004–2011
\Bibitem{SadPop20}
\by S.~I.~Sadovnikov, I.~D.~Popov
\paper Optical properties of zinc sulfide nanopowders and ZnS/Ag$_{2}$S heteronanostructures
\jour Fizika Tverdogo Tela
\yr 2020
\vol 62
\issue 11
\pages 1787--1794
\mathnet{http://mi.mathnet.ru/ftt8243}
\crossref{https://doi.org/10.21883/FTT.2020.11.50106.107}
\elib{https://elibrary.ru/item.asp?id=44257946}
\transl
\jour Phys. Solid State
\yr 2020
\vol 62
\issue 11
\pages 2004--2011
\crossref{https://doi.org/10.1134/S1063783420110268}
Linking options:
https://www.mathnet.ru/eng/ftt8243
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M. A. Zarudskikh, E. G. Ilina, A. S. Mankevich, V. P. Smagin, “Synthesis and Doping of Zinc Sulfide in a Homogeneous System Based on Dodecane, Its Identification and Optical Properties”, Russ. J. Inorg. Chem., 2024
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S. I. Sadovnikov, A. I. Gusev, “Interface in Ag$_2$S/ZnS nanoheterostructures”, JETP Letters, 113:11 (2021), 706–712
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S. I. Sadovnikov, “Elastic properties of Ag$_{2}$S and ZnS nanocrystalline cubic sulfides”, Phys. Solid State, 63:10 (2021), 1524–1531
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