TY  - JOUR
T1  - Optical characteristics of microcrystalline powders of Ag7+x(P1–xSix)S6 solid solutions
AU  - T.O.Malakhovska
AU  - A.I.Pogodin
AU  - M.J.Filep
AU  - Ya.I.Studenyak
AU  - O.P.Kokhan
AU  - V.Yu.Izai
AU  - R.Mariychuk
JO  - Semiconductor Physics, Quantum Electronics & Optoelectronics
VL  - 27
IS  - 4
SP  - 444
EP  - 449
PY  - 2024
DO  - 10.15407/spqeo27.04.444
UR  - https://doi.org/10.15407/spqeo27.04.444
AB  - Optical characteristics of microcrystalline powders of solid solutions formed in an Ag7PS6-Ag8SiS6 system were studied. The optical characteristics were determined by the diffuse reflectance spectroscopy. The diffuse reflectance spectra were analyzed using the Kubelka–Munk function and the Tauc method. The latter was used to take into account the energy structure of the studied materials. As a result, pseudo-gap values of the Ag7+x(P1–xSix)S6 solid solutions were estimated. It was found out that heterovalent P+5 → Si+4 cationic substitution within the anionic sublattice leads to a monotonic nonlinear decrease in the pseudo-gap values, which confirms the presence of a structural disorder.
KW  - optical properties
KW  - diffuse reflectance spectroscopy
KW  - microcrystalline powder
KW  - Tauc plot method
KW  - solid solution
ER  -