Luminescence from pulsed-laser-deposited (Sr0.7Ba0.3)(2)SiO4 : Eu2+ thin-film phosphors

Thin-film (Sr,Ba)(2)SiO4:Eu2+ phosphors were pulsed-laser deposited on quartz glass, sapphire, and Si wafers. The processing conditions were optimized to reduce substrate temperature during deposition and also to avoid high-temperature postdeposition annealing and reduction. In this study, the maximum processing temperature was reduced to 700 degrees C, which must be lowered even further to produce on-chip phosphor films. The exact composition of the film obtained under the optimum processing conditions was identified by Rietveld refinement analysis, and two-peak emission behavior was investigated based on the exact structure. (c) 2008 The Electrochemical Society.