Effect of preparation temperature on the formation of Sr2CeO4 phosphor particles in the spray pyrolysis

Sr2CeO4 phosphor particles were prepared by spray pyrolysis at various preparation temperatures. The effect of preparation temperatures on the morphology, crystal structure and photoluminescence characteristics of the post-treated Sr2CeO4 phosphor particles was studied. Phase pure Sr2CeO4 phosphor particles were not produced by spray pyrolysis without post-treatment. The optimum post-treatment temperature to produce the Sr2CeO4 phosphor particles with high photoluminescence intensity was 1,000 degrees C in spray pyrolysis. The spherical morphology of the as-prepared particles obtained at high preparation temperatures above 1,400 degrees C had maintained after post-treatment at 1,000 degrees C. The relative photoluminescence intensities of the Sr2CeO4 phosphor particles varied with the preparation temperatures in the spray pyrolysis. The as-prepared particles obtained by spray pyrolysis at preparation temperatures below 1,400 degrees C converted into phase pure Sr2CeO4 phosphor particles after post-treatment at 1,000 degrees C. The optimum preparation temperature of the as-prepared particles was 1,400 degrees C to produce the Sr2CeO4 phosphor particles with spherical shape and high photoluminescence intensity in the spray pyrolysis.