Danger of poisoning by stainless steel anodes used for the electrophoreticdeposition of phosphors - Composition of screens as monitored by laser Raman spectroscopy

YNbO4:Bi phosphor screens deposited by the electrophoretic deposition metho d have been examined using laser Raman spectroscopy. Evidence was found tha t screens, which manifested poor performance under cathodoluminescence test ing, were contaminated with Fe3+ ions. The presence of Fe3+ ions could only have originated in the stainless steel anode. This work demonstrates the d anger of using anodes capable of poisoning the phosphor. (C) 1999 The Elect rochemical Society. S1099-0062(98)12-037-0. All rights reserved.