X-Ray Photoelectron Spectroscopy of Ag- and Cu-Doped Amorphous As2Se3 and GeSe2

Abstract

Ag- and Cu-doped amorphous As₂Se₃ and GeSe₂ were studied by XPS. The binding energies and/or Auger kinetic energies were determined for films of Ag and Cu, and amorphous films of Ge, As, Se, GeSe₂, As₂Se₃, Ag-doped GeSe₂, Ag- and Cu-doped As₂Se₃. The chemical shifts revealed that electrons are transferred from doped metal atoms to As and Se for As₂Se₃, and to Ge and Se for GeSe₂. The valence band spectra were also examined. Modifications of amorphous networks are discussed.