Facile strategy and mechanism for orthorhombic SnO_2 thin films

摘要

Orthorhombic phase SnO_2 is a material with unknown optical, electrical, and gas-sensing properties. It was found previously only at high pressures and temperatures. A facile strategy for the synthesis of orthorhombic SnO_2 is of fundamental importance. Using pulsed-laser deposition, the authors report a kind of experimental realization of a pure orthorhombic SnO_2 thin film under low pressure and temperature that are much lower than those of traditional methods. The optical properties of an orthorhombic SnO_2 thin film were measured by spectrophotometric transmittance. The oxygen exchange reaction mechanism at the grain interfaces was proposed to explain the formation and optical properties of this orthorhombic phase.