TY  - JOUR
AU  - Hernández-Rodríguez, M.A.
AU  - Muñoz-Santiuste, J.E.
AU  - Lavín, V.
AU  - Lozano-Gorrín, A.D.
AU  - Rodríguez-Hernández, P.
AU  - Muñoz, A.
AU  - Venkatramu, V.
AU  - Martín, I.R.
AU  - Rodríguez-Mendoza, U.R.
T1  - High pressure luminescence of Nd3+ in YAlO3 perovskite nanocrystals: A crystal-field analysis
LA  - eng
PY  - 2018
T2  - Journal of Chemical Physics
SN  - 0021-9606
VL  - 148
IS  - 4
PB  - American Institute of Physics Inc.
AB  - Pressure-induced energy blue- and red-shifts of the 4F3/2 → 4I9/2,11/2 near-infrared emission lines of Nd3+ ions in YAlO3 perovskite nano-particles have been measured from ambient conditions up to 29 GPa. Different positive and negative linear pressure coefficients have been calibrated for the emission lines and related to pressure-induced changes in the interactions between those Nd3+ ions and their twelve oxygen ligands at the yttrium site. Potentiality of the simple overlap model, combined with ab initio structural calculations, in the description of the effects of these interactions on the energy levels and luminescence properties of the optically active Nd3+ ion is emphasized. Simulations show how the energies of the 4f3 ground configuration and the barycenters of the multiplets increase with pressure, whereas the Coulomb interaction between f-electrons decreases and the crystal-field strength increases. All these effects combined explain the wavelength blue-shifts of some near-infrared emission lines of Nd3+ ions. Large pressure rates of various emission lines suggest that a YAlO3 perovskite nano-crystal can be a potential candidate for near-infrared optical pressure sensors.
DO  - 10.1063/1.5010150
UR  - https://portalciencia.ull.es/documentos/5e3c3f1929995246bbf61519
DP  - Dialnet - Portal de la Investigación
ER  -