Facile synthesis of BiCuOS by hydrothermal methods

William C. Sheets, Evan S. Stampler, Houria Kabbour, Mariana I. Bertoni, Laurent Cario, Thomas O. Mason, Tobin J. Marks, Kenneth R. Poeppelmeier

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Abstract

BiCuOS, which is isostructural to the layered rare-earth oxysulfides LnCuOS (Ln = La-Eu), was synthesized by a single-step hydrothermal reaction at low temperature (250°C) and pressure (<20 atm). Particular emphasis is placed on how the selection of the proper reaction conditions, such as temperature and pH, achieves a mutual high solubility of the metal-oxide reactants, Bi 2O3 and Cu2O, and thus generates BiCuOS in a good yield. The optical and electrical properties of BiCuOS were measured to determine the influence of replacing a rare-earth cation with bismuth. The electrical conductivity of BiCuOS is increased over that of certain layered rare-earth oxysulfides, LnCuOS (Ln = La, Pr, and Nd), and is similar to that of the cerium members, CeCuOS and CeAgOS. Band structure calculations reveal that, similar to other potential transparent conductors containing sixth-row elements, relativistic effects significantly lower the energy of the conduction band, and thus narrow the optical band gap. These low-energy conduction bands are responsible for the electrical and optical properties of BiCuOS.

Original languageEnglish
Pages (from-to)10741-10748
Number of pages8
JournalInorganic Chemistry
Volume46
Issue number25
DOIs
Publication statusPublished - Dec 10 2007

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Cite this

Sheets, W. C., Stampler, E. S., Kabbour, H., Bertoni, M. I., Cario, L., Mason, T. O., Marks, T. J., & Poeppelmeier, K. R. (2007). Facile synthesis of BiCuOS by hydrothermal methods. Inorganic Chemistry, 46(25), 10741-10748. https://doi.org/10.1021/ic7014622