Synthesis and low-voltage characteristics of CaTiO3:Pr luminescent powders

The perovskite CaTiO3:Pr phosphors which have relatively small bandgaps were synthesized and characterized for their application to field emitter displays. Good crystal powders, homogenous, small (similar to 1 mu m), and spherical, were easily formed without flux. Phosphor preparation parameters such as heat-treatment temperature, time, and activator concentration were optimized for the maximal intensity of photoluminescence. Phosphor cathodoluminescent characteristics were examined by a refractory metal electron gun in a high vacuum chamber. After electrophoretic deposition of phosphors on indium-tin oxide (ITO) glass, then excitation by field emitter arrays, lumen intensity could be obtained up to 10 cd/m(2) with chromaticity of X = 0.625 and Y = 0.297.