•연구자: 물리학과 위상원
•발표일: 2022.08.01
•DOI: https://doi.org/10.1557/s43578-022-00666-3
•S. W. Wi et al., Journal of Materials Research(Q3), 37, 2458-2467 (2022)
•Abstract
We investigated the photoluminescence and crystal structures of a Dy3+-doped AZrO3 (AZrO3:Dy) perovskite series, where A = Ca, Sr, and Ba. The change in the global symmetry of the A ion and the local structural changes caused by Dy3+ doping were investigated using Rietveld refinement of the X-ray diffraction patterns of AZrO3:Dy. Under ultraviolet photoexcitation the samples showed two typical blue and yellow emission peaks resulting from f to f transitions of Dy3+ ions. The emission intensities depended strongly on the symmetry of the host material, i.e., the emission intensity was strongest in CaZrO3 with the lowest lattice symmetry among AZrO3. The yellow-to-blue intensity ratio estimated from the emission profile of Dy3+ was found to be closely related to the local lattice distortion. Our results showed that the luminescent properties of AZrO3:Dy were sensitive to the structural changes related to the A ion species and to Dy3+ ion doping.