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RESEARCH PRODUCT

Luminescence of nano- and macrosized LaPO4:Ce,Tb excited by synchrotron radiation

Anatoli I. PopovClaus FeldmannVladimir PankratovA. Kotlov

subject

Materials scienceOrganic ChemistryAnalytical chemistryNanoparticleSynchrotron radiationPhosphor02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnology7. Clean energy01 natural sciencesAtomic and Molecular Physics and Optics0104 chemical sciencesElectronic Optical and Magnetic MaterialsNanomaterialsIonInorganic ChemistryNanocrystalExcited stateddc:530Electrical and Electronic EngineeringPhysical and Theoretical Chemistry0210 nano-technologyLuminescenceSpectroscopy

description

Abstract Comparing the luminescence properties of nanosized and macroscopic LaPO4:Ce,Tb powders are performed in wide spectral range using synchrotron radiation. In the present study, LaPO4:Ce,Tb nanopowder was produced by means of a microwave-induced synthesis in ionic liquids, whereas the bulk sample represents a commercial lamp phosphor. Emission and excitation of both, Ce3+ and Tb3+ luminescence, is observed to be different when comparing bulk and nanosized LaPO4:Ce,Tb. In particular, it was shown that the fine structure of the Ce3+ as well as the Tb3+ related emission is poorly resolved for the nanomaterial. It is suggested that the nanoparticles surface plays a key role regarding the perturbation of rare-earth ions and changes their luminescence properties. Furthermore, it is demonstrated that allowed f–d transitions on Tb3+ at high energy are significantly suppressed for nanosized LaPO4:Ce,Tb. Energy transfer is required to initiate Tb3+ emission even in the vacuum ultraviolet spectral range.

yearjournalcountryeditionlanguage
2011-05-01Optical Materials
https://doi.org/10.1016/j.optmat.2010.12.019