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

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


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 (US)
Pages (from-to)10741-10748
Number of pages8
JournalInorganic chemistry
Issue number25
StatePublished - Dec 10 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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