کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1666643 | 1518082 | 2012 | 4 صفحه PDF | دانلود رایگان |
Vanadium dioxide thin films with excellent thermochromic switching properties were deposited on indium tin oxide (ITO)-coated glass substrates with the RF magnetron sputtering technique. Reversible transmission switching of these films from as much as 65% to near zero at 2500 nm, with contrast ratios of more than 3000, was observed. These films compare favorably to those deposited on glass slides, and, in particular, show a resistivity drop of nearly 2 orders of magnitude upon switching to the metallic state. Inducing the metal–insulator transition by electrical current through the ITO layer lowers the transition temperature by 4–7 °C, as compared to traditional heating of the sample by a heating plate. The presence of an ITO sublayer also seems to result in smaller grain size and slightly broader hysteresis in VO2 films.
► Vanadium dioxide (VO2) films deposited on transparent conductive substrates (ITO).
► Excellent thermochromic switching with contrast ratios of 3000 or better.
► Lower transition temperatures obtained via Joule heating.
► Effect of Frankel–Poole mechanism on transition temperature.
Journal: Thin Solid Films - Volume 522, 1 November 2012, Pages 204–207