6533b85ffe1ef96bd12c1a01
RESEARCH PRODUCT
The role of disorder on Er3+ luminescence in Na1/2Bi1/2TiO3
Anatolijs SarakovskisGuna KriekeEriks BirksL. EgliteM. DunceMaija AntonovaJ. Grubesubject
010302 applied physicsRange (particle radiation)PhotoluminescenceMaterials scienceMechanical EngineeringPolingMetals and AlloysPhysics::Optics02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesMolecular physicsIonCondensed Matter::Materials ScienceWavelengthMechanics of Materials0103 physical sciencesMaterials Chemistry0210 nano-technologyMaximaLuminescenceExcitationdescription
Abstract Photoluminescence in Er-doped NBT is studied at different temperatures. Remarkable reduction of the luminescence intensity in the green spectral range is found in the poled state comparing with the depoled state. Luminescence spectra at low temperatures reveal continuous wavelength shift of some maxima belonging to the 4 S 3/2 → 4 I 15/2 transition depending on the excitation wavelength, which is explained by large variety of different environments around Er 3+ related to the random distribution of Na + and Bi 3+ in A-sublattice of the ABO 3 perovskite structure. Poling extends the wavelength range where shift of luminescence maxima is observed in the direction of longer excitation wavelengths. This feature can be explained by more ordered structure characteristic to the poled state comparing with the depoled one. Luminescence spectra of Er-doped BaTiO 3 are also measured at low temperatures, and confirm the role of Na + and Bi 3+ ion disorder in the observed spectral features of Er-doped NBT.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-09-01 | Journal of Alloys and Compounds |