REACTIVE METAL SOURCES AND DEPOSITION METHOD FOR THIOALUMINATE PHOSPHORS

摘要

A physical vapour deposition method for the deposition of thioaluminate phosphor compositions comprises providing one or more source materials comprising an intermetallic barium aluminum compound, a barium aluminum allo y or a protected barium metal, providing an activator species and effecting deposition of the one or more source materials and activator species as a phosphor composition on a selected substrate. The method allows for the deposition of blue thin film electroluminescent phosphors with high luminanc e and colors required for TV applications.