Structure of semiconducting versus fast-ion conducting glasses in the Ag-Ge-Se system.

ABSTRACT: The transition from a semiconductor to a fast-ion conductor with increasing silver content along the Ag _x (Ge_0.25Se_0.75)_(100-x) tie line (0≤x≤25) was investigated on multiple length scales by employing a combination of electric force microscopy, X-ray diffraction, and neutron diffraction. The microscopy results show separation into silver-rich and silver-poor phases, where the Ag-rich phase percolates at the onset of fast-ion conductivity. The method of neutron diffraction with Ag isotope substitution was applied to the x=5 and x=25 compositions, and the results indicate an evolution in structure of the Ag-rich phase with change of composition. The Ag-Se nearest-neighbours are distributed about a distance of 2.6

SUBMITTER: Zeidler A 

PROVIDER: S-EPMC5792920 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature