Preparation and Photoconductivity of Films of Bi2O3-MO3 (M equals Mo, or W) Obtained by Rapid Quenching.

Article abstract of DOI:10.1016/0025-5408(86)90115-7

The Bi//2O//3-MO//3 films (M equals Mo or W) were prepared by a rapid quenching technique using a twin-roller type equipment. The quenched films containing from 2. 5 to 5 mol% MO//3 or WO//3 precipitated only a tetragonal phase. By further increase of these oxide additives, a cubic phase ( delta -phase) was formed coexisting with the tetragonal one. The lowest content of the additives to form singly the delta -phase was 12. 5% for MoO//3// and 10% for WO//3 respectively. The quenched films were characterized by a high photoconductivity. The highest photoconductivity appeared when a beam of about 500 nm in wavelength was irradiated on the film. The photoconduction was observed in all films containing less than 12. 5% additives.