title: Evolution of thermochromism during oxidation of evaporated vanadium films.
abstract: Thin vanadium oxide films were made by vacuum evaporation followed by the annealing posttreatment in the presence of air. The thickness increased by a factor as large as approximately 2.3 on oxidation. Electron diffractograms indicated a bcc ? monoclinic transformation during the annealing, and electron micrographs showed pronounced grain growth. Temperature-dependent electrical conductivity as well as spectral transmittance was measured vs annealing time. At an initial thickness of 0.12 microm, it took a few hours to establish VO(2) films with a well defined semiconductor-metal transition and concomitant thermochromic switching at approximately 57 degrees C.
authors.forename: S J
authors.initials: SJ
authors.lastname: Jiang
authors.forename: C B
authors.initials: CB
authors.lastname: Ye
authors.forename: M S
authors.initials: MS
authors.lastname: Khan
authors.forename: C G
authors.initials: CG
authors.lastname: Granqvist