Journal
ACS PHOTONICS
Volume 1, Issue 8, Pages 662-669Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ph500208q
Keywords
upconverting nanoparticles; microwave synthesis; core/shell; color tuning; energy migration; lanthanides
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Funding
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Canadian Institute for Photonic Innovations (CIPI)
- Fonds de Recherche du Quebec - Nature et Technologies (FRQNT)
- NSERC
- FRQNT
- Fundacion Ramon Areces
- FQRNT
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Ultrasmall NaGdF4 nanoparticles with core/shell and core/shell/shell architectures have been synthesized following a microwave-based thermolysis procedure, allowing us to rapidly obtain homogeneous nanoparticles compared to,conventional heating. To analyze the possibilities of the, proposed structure in terms of tuning the emission color, core and shells have been doped with different lanthanide ion pairs (either Er3+/Yb-3+ and/or Tm3+/Yb3+), keeping them, therefore spatially separated inside the different layers of the nanoparticles. Here, we demonstrate that the position of the dopants inside the nanoparticles affects the intensity of the different emission bands of the luminescing TM3+ and Er3+ ions show how it has a relevant effect on the overall emission color of the luminescence obtained after 975 nm excitation.
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