Wang, R. P.Rode, A. V.Choi, Duk-YongLuther-Davies, B.2015-12-212015-12-210021-8979http://hdl.handle.net/1885/95157We have measured and analyzed x-ray photoelectron spectra of a series of GexAsySe1−x−yglasses. The valence band spectra show that a number of Se-rich structures exist in the samples. After decomposing Ge, As, and Se3dspectra into several doublets and assigning them to the different local bond structures, it was found that, while GeSe₄/₂ tetrahedral, AsSe₃/₂ pyramidal, and Se trimers decrease in their integrated areas, most defect bonds increase with increasing mean coordination number. Moreover, while the appearance of Se trimers is reasonable in Se-rich samples, they never vanish, even in Se-poor samples. A possible mechanism to form Se trimers in Se-poor samples is discussed.This research was supported by Australian Research Council through its Centres of Excellence and Federation Fellow Programs.http://www.sherpa.ac.uk/romeo/issn/0021-8979..."Publishers version/PDF may be used on author's personal website, institutional website or institutional repository" from SHERPA/RoMEO site (as at 22/12/15). Copyright 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Applied Physics and may be found at https://doi.org/10.1063/1.2909883Keywords: Chemical bonds; Decomposition; Dimers; X ray photoelectron spectroscopy; Coordination number; Pyramidal; GlassInvestigation of the structure of GexAsySe1−x−y glasses by x-ray photoelectron spectroscopy2008-04-2410.1063/1.29098832016-02-24