Application of density functional theory and photoelectron spectra to the adsorption and reaction of H2S on Si (100)

Tsung Fan Teng, Chun Yi Chou, Wei Hsiu Hung, Jyh Chiang Jiang

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Abstract

The adsorption and reaction of H2S on a Si(100) surface were investigated using density functional theory (DFT) and X-ray photoelectron spectra (XPS). The decomposition of H2S results in the formation of S adatoms via a HS species. We propose four reaction paths for the decomposition of adsorbed H2S; the corresponding structural conformations of H 2S, HS, and S species are presented. The density of states and electron density difference were utilized to illustrate the interaction between S-containing species and surface Si atoms. The interaction of the surface Si atom and the H atom of H2S facilitates the decomposition of adsorbed H2S. The assignments of XPS data are correlated with the proposed intermediates during the thermal decomposition of H2S.

Original languageEnglish
Pages (from-to)19203-19209
Number of pages7
JournalJournal of Physical Chemistry C
Volume115
Issue number39
DOIs
Publication statusPublished - 2011 Oct 6

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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