Abstract

The photoluminescent properties of one-dimensional ${\mathrm{LaPO}}_4:\mathrm{Eu}$ nanowires were studied in contrast with the corresponding zero-dimensional nanoparticles, micrometer particles, and micrometer rods. The results indicate that in nanowires ${\mathrm{Eu}}^{3+}$ ions occupied two different symmetry sites, unlike in nanoparticles and micrometer particles. Furthermore, the radiative transition rate of ${{}^{5}D}_1–{\sum }_J {{}^{7}F}_J$ or ${{}^{5}D}_0–{\sum }_J {{}^{7}F}_J$ and the internal luminescent quantum efficiency of ${\mathrm{Eu}}^{3+}$ in the nanowires showed obvious improvement over that in the other powders.

© 2005 Optical Society of America

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