Development and description of photochromic devices prepared by sputtering

Photochromic devices are prepared by using the sputter coated TiO2 and WO3 films. A mathematical model is to predict the transmission of the photochromic devices and their kinetics depending on the light intensities for different thickness of TiO2 and WO3 layer. The visual transmission of a PC device based glass substrate (without transparent conductive oxide) could be reduced from 71 down to 26 % in 40 min under A.M. 1.5 illumination.