화학공학소재연구정보센터
Solar Energy Materials and Solar Cells, Vol.91, No.1, 62-66, 2007
A note on fast protonic solid state electrochromic device: NiOx/Ta2O5/WO3-x
In the present investigation, the electrochromic properties of a fast protonic solid state device: NiOx/Ta2O5/WO3-x prepared at room temperature (300 K) is reported. The non-stoichiometric tungsten oxide thin film is prepared by reactive DC magnetron sputtering technique on ITO coated glass; the oxides of tantalum (similar to 300 nm) and nickel (similar to 100 nm) are prepared by electron beam evaporation. This proton device has a coloration efficiency of similar to 82.4 cm(2)/C and coloration and bleaching time of 6 and 5 s, respectively, and a transmittance variation of 60%. The work function of WO3-x thin films by Kelvin probe in uncolored and colored states are 4.73 and 4.30eV, respectively. (c) 2006 Elsevier B.V. All rights reserved.