X-Ray Photoelectron Spectroscopy of Ag- and Cu-Doped Amorphous As 2 Se 3 and GeSe 2

Ag- and Cu-doped amorphous As 2 Se 3 and GeSe 2 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, GeSe 2 , As 2 Se 3 , Ag-doped GeSe 2 , Ag- and Cu-doped As 2 Se 3 . The chemical shifts revealed that electrons are transferred from doped metal atoms to As and Se for As 2 Se 3 , and to Ge and Se for GeSe 2 . The valence band spectra were also examined. Modifications of amorphous networks are discussed.