Structure–property relationships in Ag6+x(Р1‒xSix)S5I argyrodite-type solid solutions
Abstract
In this work, single crystals of solid solutions Ag6.25P0.75Si0.25S5I and Ag6.75P0.25Si0.75S5I were obtained and studied. The synthesis was carried out using a one-temperature method, and the crystals were grown by directional crystallization from a melt. The crystal structure was investigated using X-ray diffraction with Rietveld refinement. It was established that the compounds crystallize in space group F-43m with lattice parameters a = 10.549 and 10.604 . Electrical properties studied by impedance spectroscopy revealed predominantly ionic conductivity, exceeding the electronic contribution by four orders of magnitude. Increasing silicon content enhances ionic conductivity up to 102 S/cm and reduces activation energy. These effects are attributed to changes in the crystal structure and mobility of Ag+ ions.
Fields of Study & Subjects
Advanced Thermoelectric Materials and Devices
Phase-change materials and chalcogenides
Thermal Expansion and Ionic Conductivity
Publication details
- Journal / source
- Semiconductor Physics Quantum Electronics & Optoelectronics
- Publisher
- National Academy of Sciences of Ukraine (Co. LTD Ukrinformnauka) (Publications)
- Volume
- 29
- Issue
- 01
- Pages
- 028–035
- Publication date
- 25 March 2026