Temperature Driven Reactant Solubilization Synthesis of BiCuOSe

Evan Stampler (1) , William Sheets (1, 2) , Mariana Bertoni (1) , Wilfrid Prellier (2) , Thomas Mason (1) , Kenneth Poeppelmeier (1)

1 Northwestern University [Evanston]
2 CRISMAT - Laboratoire de cristallographie et sciences des matériaux

Phase-pure BiCuOSe, which is isostructural to the layered p-type transparent conductor LaCuOS, has been synthesized in high yield by a single-step hydrothermal reaction at low temperature (250 degrees C) and pressure (<20 atm). A moderate reaction temperature of 250 degrees C was sufficiently high to solubilize both Bi2O3 and Cu2O and stabilize monovalent copper and low enough to impede the oxidation of dianionic selenium. BiCuOSe exhibits a relatively high electrical conductivity (sigma approximately 3.3 S cm(-1)) and a reduced band gap (E(g) = 0.75 eV), which compare favorably with the optoelectronic properties of BiCuOS and the cerium-based oxysulfides, CeAgOS and CeCuOS.

Domaines: Physique [physics]; Chimie; Matériaux

Evan Stampler, William Sheets, Mariana Bertoni, Wilfrid Prellier, Thomas Mason, et al.. Temperature Driven Reactant Solubilization Synthesis of BiCuOSe. Inorganic Chemistry, 2008, 47 (21), pp.10009-10016. ⟨10.1021/ic801267m⟩. ⟨hal-03545115⟩