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The Structure of GaSbSe Glasses by High‐Resolution X‐Ray Photoelectron Spectroscopy
Author(s) -
Golovchak Roman,
Calvez Laurent,
Lecomte Alicia,
Kovalskiy Andriy,
Luftman Henry,
Jain Himanshu
Publication year - 2021
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.202100074
Subject(s) - x ray photoelectron spectroscopy , selenide , antimony , valence (chemistry) , materials science , covalent bond , spectroscopy , analytical chemistry (journal) , spectral line , metal , coordination number , crystallography , chemistry , inorganic chemistry , selenium , nuclear magnetic resonance , ion , physics , organic chemistry , quantum mechanics , chromatography , metallurgy , astronomy
To understand the unique physical properties of GaSbSe glasses, high‐resolution X‐ray photoelectron spectroscopy (XPS) studies are performed on representative compositions within the glass‐forming region. The observed peaks in the valence band as well as in Ga, Sb, and Se core‐level XPS spectra are related to the main structural building blocks of the covalent network. On the basis of disproportionality equations and quantitative XPS analysis, the SeSeSe fragments are shown to exist in the glasses with 65 and 68 at% of Se, whereas the samples with lower Se content are shown to contain a significant concentration of SeSe bonds instead. Although the majority of Ga atoms are deemed to form fourfold coordinated units, the existence of Ga atoms in threefold coordination, those bonded to other metal, and forming Ga clusters of undissolved Ga are also plausible on the basis of Ga 3 d XPS spectrum analysis. Partial or full destruction of antimony selenide pyramids is found in glasses with low Se content.