TY - JOUR
T1 - Investigation of the structure of Gex Asy Se1-x-y glasses by x-ray photoelectron spectroscopy
AU - Wang, R. P.
AU - Rode, A. V.
AU - Choi, D. Y.
AU - Luther-Davies, B.
PY - 2008
Y1 - 2008
N2 - We have measured and analyzed x-ray photoelectron spectra of a series of Gex Asy Se1-x-y glasses. The valence band spectra show that a number of Se-rich structures exist in the samples. After decomposing Ge, As, and Se 3d spectra 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.
AB - We have measured and analyzed x-ray photoelectron spectra of a series of Gex Asy Se1-x-y glasses. The valence band spectra show that a number of Se-rich structures exist in the samples. After decomposing Ge, As, and Se 3d spectra 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.
UR - http://www.scopus.com/inward/record.url?scp=43049121748&partnerID=8YFLogxK
U2 - 10.1063/1.2909883
DO - 10.1063/1.2909883
M3 - Article
SN - 0021-8979
VL - 103
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 8
M1 - 083537
ER -