Tailoring the Structure and Luminescence of Nanostructured Er3+ and Er3+/Yb3+-Activated Hafnia-Based Systems

Nanostructured Er3+‐ and Er3+/Yb3+‐activated hafnium oxide films and nanoparticles were prepared from a stable colloidal suspension and investigated by several techniques such as transmission electron microscopy, X‐ray diffraction, dynamic light scattering, atomic force microscopy, Fourier‐transform...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2015-10, Vol.98 (10), p.3136-3144
Main Authors: Cunha, César dos Santos, Ferrari, Jefferson Luis, Ribeiro, Sidney José Lima, Ferrari, Maurizio, Gonçalves, Rogéria Rocha
Format: Article
Language:English
Subjects:
Atomic force microscopy
Atomic structure
Erbium
Hafnium oxide
Immersion coating
Light diffraction
Metastable state
Microscopy
Nanostructure
Oxide coatings
Photoluminescence
Photon correlation spectroscopy
Photonics
Silicon dioxide
Silicon substrates
Transmission electron microscopy
X-ray diffraction
Ytterbium
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Summary:Nanostructured Er3+‐ and Er3+/Yb3+‐activated hafnium oxide films and nanoparticles were prepared from a stable colloidal suspension and investigated by several techniques such as transmission electron microscopy, X‐ray diffraction, dynamic light scattering, atomic force microscopy, Fourier‐transform infrared spectroscopy, and photoluminescence. Low roughness and crack‐free films were deposited by dip‐coating and spin‐coating techniques on vitreous SiO2 and Si substrates. Nanostructured particles were also synthesized. Remarkable structural and spectroscopic differences were observed for hafnium oxide‐based materials as a function of the Er3+ and Er3+/Yb3+ concentration. The 4I13/2 → 4I15/2 emission bandwidth and the lifetime of the 4I13/2 metastable state of Er3+ was tailored through the rare‐earth concentration. The Er3+ emission in HfO2 can be explored for photonic applications.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.13689