ORCID Profile
0000-0002-5426-3960
Current Organisation
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences
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Publisher: IOP Publishing
Date: 27-03-2013
Publisher: Wiley
Date: 10-09-2012
Publisher: Elsevier BV
Date: 04-2021
Publisher: Elsevier BV
Date: 04-2022
Publisher: Elsevier BV
Date: 10-2020
Publisher: Elsevier BV
Date: 2023
Publisher: AIP Publishing
Date: 12-05-2014
DOI: 10.1063/1.4876258
Abstract: The structure of GexSb10Se90−x glasses (x = 7.5, 10, 15, 20, 25, 27.5, 30, and 32.5 at. %) has been investigated by x-ray photoelectron spectroscopy (XPS). Different structural units have been extracted and characterized by decomposing XPS core level spectra, the evolution of the relative concentration of each structural unit indicates that, the relative contributions of Se-trimers and Se-Se-Ge(Sb) structure decrease with increasing Ge content until they become zero at chemically stoichiometric glasses of Ge25Sb10Se65, and then the homopolar bonds like Ge-Ge and Sb-Sb begin to appear in the spectra. Increase of homopolar bonds will extend band-tails into the gap and narrow the optical band gap. Thus, the glass with a stoichiometric composition generally has fewer defective bonds and larger optical bandgap.
Publisher: Elsevier BV
Date: 09-2017
Publisher: Elsevier BV
Date: 03-2023
Publisher: The Optical Society
Date: 22-04-2014
DOI: 10.1364/OME.4.001011
Publisher: AIP Publishing
Date: 21-03-2014
DOI: 10.1063/1.4869260
Abstract: GexSb10Se90−x glasses with Ge content from 7.5 to 32.5 at. % have been prepared by melt-quench technique, and the physical parameters including glass transition temperature (Tg), density (ρ), compactness (C), shear elastic moduli (Cs), compression elastic moduli (Cc), refractive index (n), and optical bandgap (Eg) have been investigated. While all these physical parameters show threshold behavior in the glass with a chemically stoichiometric composition. Raman spectra analysis also indicates that, with increasing Ge content, Se-chains or rings gradually disappear until all Se-atoms are consumed in the glass with a chemically stoichiometric composition. With further increasing Ge content, homopolar Ge-Ge and Sb-Sb bonds are formed and the chemical order in the glasses is violated. The threshold behavior of the physical properties in the GexSb10Se90−x glasses can be traced to demixing of networks above the chemically stoichiometric composition.
Publisher: American Chemical Society (ACS)
Date: 02-08-2013
DOI: 10.1021/JP404001H
Publisher: Informa UK Limited
Date: 11-02-2022
Publisher: Elsevier BV
Date: 05-2020
Publisher: Informa UK Limited
Date: 24-08-2017
Location: China
Start Date: Start date not available
End Date: End date not available
Funder: National Natural Science Foundation of China
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