Tailoring the Structure and Luminescence of Nanostructured Er3+ and Er3+/Yb3+‐Activated Hafnia‐Based Systems. Issue 10 (1st July 2015)

• Record Type: Journal Article
• Authors: Cunha, César dos Santos; Ferrari, Jefferson Luis; Ribeiro, Sidney José Lima; Ferrari, Maurizio; Gonçalves, Rogéria Rocha
• Is Part Of: Journal of the American Ceramic Society. Volume 98:Issue 10(2015)
• Page Start: 3136
• Page End: 3144
• Publication Date: 2015-07-01
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13689
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract : Nanostructured Er 3+ ‐ and Er 3+ /Yb 3+ ‐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 Er 3+ and Er 3+ /Yb 3+ concentration. The 4 I13/2 → 4 I15/2 emission bandwidth and the lifetime of the 4 I13/2 metastable state of Er 3+ was tailored through the rare‐earth concentration. The Er 3+ emission in HfO2 can be explored for photonic applications.