Abstract
Green-emitting LaPO 4:Ce,Tb phosphor particles were synthesized by a large-scale spray pyrolysis. The prepared phosphor particles had a completely spherical shape, fine size, and high brightness under ultraviolet. The phosphor particles had the maximum photoluminescence intensity after posttreatment at 1300 °C even without flux material. The phosphor particles had a spherical shape and non-aggregation characteristics. The types of phosporous source affected the morphological characteristics and photoluminescence of the prepared particles. Particles prepared from a solution with ammonium hydrogen phosphate had a higher brightness than those prepared from solutions with ammonium dihydrogen phosphate, ammonium phosphate, or phosphoric acid. The maximum brightness of particles prepared by spray pyrolysis was 109% that of the commercial product with non-spherical shape and large size.
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