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Doping Homogeneity in Co-doped Materials Investigated at Different Length Scales

Abstract

Doping homogeneity is important for the properties of co-doped phosphors, as it can affect the energy transfer between sensitizer and activator ions. In a case study we apply different methods, that is scanning electron microscopy (SEM) combined with energy dispersive X-ray spectroscopy (EDX) mapping, SEM combined with cathodoluminescence (CL) and solid-state nuclear magnetic resonance (NMR), to study the doping homogeneity of the host system monazite LaPO4 doped with two different lanthanide ions on different length scales. A new criterion for doping heterogeneity in co-doped systems is developed, which is based on the NMR visibility function, which for this purpose is extended to doping with two or more paramagnetic dopants. A deviation from this function is indicative of doping heterogeneity on the length-scale of the blind-spheres of the paramagnetic dopants. A discussion of the advantages and disadvantages of the different methods is presented. The combined approach allows to study doping homogeneity from the nm to the μm scale.

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Publication details

The article was received on 14 Oct 2019, accepted on 04 Dec 2019 and first published on 04 Dec 2019


Article type: Paper
DOI: 10.1039/C9CP05599A
Phys. Chem. Chem. Phys., 2019, Accepted Manuscript
  • Open access: Creative Commons BY-NC license
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    Doping Homogeneity in Co-doped Materials Investigated at Different Length Scales

    W. Li, P. F. Smet, L. I. D. J. Martin, C. Pritzel and J. Schmedt auf der Günne, Phys. Chem. Chem. Phys., 2019, Accepted Manuscript , DOI: 10.1039/C9CP05599A

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