Electrochromism of glasses and sputtered amorphous films in the system Li2O-WO3-Nb2O5.

Electrochromic absorption spectra were measured for rapidly quenched glasses and RF-sputtered amorphous films in the system Li2O–WO3Nb2O5. The absorption maximum was shifted to shorter wavelengths and the color varied from blue to brown with increasing Nb2O5 contents. The absorption maxima were broader in the sputtered films than in the rapidly quenched glasses, but no essential difference in absorption spectra was observed between the glasses and the sputtered films.