Abstract
The red-emitting (Y 1− x Gd x ) 0.94Eu 0.06VO 4 (0 ≤ x ≤ 1.0) phosphors were synthesized by ultrasonic spray pyrolysis. The (Y 1− x Gd x ) 0.94Eu 0.06VO 4 (0 ≤ x ≤ 1.0) phosphors had the tetragonal xenotime structure with a space group of I4 1/amd (1 4 1). The calculated crystallite sizes of the annealed phosphors ranged from 58 to 68 nm. In this study, we discussed the photoluminescence properties of the (Y 1− x Gd x ) 0.94Eu 0.06VO 4 phosphors under VUV excitation, depending on Gd content. The emission intensity of the (Y 1− x Gd x ) 0.94Eu 0.06VO 4 phosphors increased with increasing Gd content up to x = 0.5, and then decreased with a further increase in Gd content. The purest red color was obtained for the (Y 0.5Gd 0.5) 0.94Eu 0.06VO 4 phosphors.
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