Electrochromic glass films of tungsten oxide have been prepared by the
sol-gel method. Counter electrode of titanium and cerium oxide were o
btained by the same method. The spectral time response as well as the
charge capacity were measured as a function of the conductivity of the
conductive support glasses. Optimum conditions for the electrochromic
device operation were established. (C) 1998 Elsevier Science B.V. All
rights reserved.