Site-Selective Doping and Site-Sensitive Photoluminescence of Eu and Tb in Perovskite-Type LaLuO.

Eu and Tb ions were site-selectively doped into LaLuO with the orthorhombic perovskite-type structure (ABO), and their luminescence properties were examined considering the doping sites (A or B sites). The X-ray diffraction analysis revealed the expansion or contraction of the unit cell volumes of the materials depending on the doping sites. The spectra of X-ray absorption near edge structure for the Eu and Tb L edge exhibited different shapes for the ions at A and B sites, confirming the site-selective doping of Eu and Tb in LaLuO.