Improved photoluminescent properties in one-dimensional LaPO_4:Eu~(3+) nanowires

摘要

The photoluminescent properties of one-dimensional LaPO_4:Eu nanowires were studied in contrast with the corresponding zero-dimensional nanoparticles, micrometer particles, and micrometer rods. The results indicate that in nanowires Eu~(3+) ions occupied two different symmetry sites, unlike in nanoparticles and micrometer particles. Furthermore, the radiative transition rate of~5D_1--(sigma)_J ~7F_J or ~5D_0--(sigma)_J ~7F_J and the internalluminescent quantum efficiency of Eu~3+ in the nanowires showed obvious improvement over that in the other powders.