6533b83afe1ef96bd12a78a0

RESEARCH PRODUCT

The role of structural disorder on luminescence of Eu-doped Na0.5Bi0.5TiO3

Eriks BirksLiga BikseAnatolijs SarakovskisMaija AntonovaGuna KriekeM. Dunce

subject

010302 applied physicsExcitation wavelengthMaterials sciencePhotoluminescenceDopingGeneral Physics and AstronomyLuminescence spectra02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesMolecular physicsLocal structureCrystal0103 physical sciencesLocal environment0210 nano-technologyLuminescence

description

A detailed analysis of photoluminescence of Eu-doped Na0.5Bi0.5TiO3 (NBT) is performed using it as a tool for describing the local structure of NBT. The obtained results reveal the low symmetry of the Eu3+ local environment in NBT, as indicated by the observed maximal number of sublevels of the 5D0→7F1 and the 5D0→7F2 luminescence transitions, clearly observed at low temperatures. Approximation of the luminescence spectra by Gaussian peaks provides valuable information about the shift of the involved levels upon change of the excitation wavelength. Variation in the strength of the crystal field in Eu-doped NBT is evaluated. Temperature dependence of the luminescence above room temperature is analyzed for the poled and the unpoled states of the material. The results obtained for Eu-doped NBT are compared with the results for Er-doped NBT reported previously.

yearjournalcountryeditionlanguage
2020-12-28Journal of Applied Physics
https://doi.org/10.1063/5.0031305