| Full text | |
| Author(s): |
Lima, Karmel De Oliveira
;
Caixeta, Fabio Jose
;
De Souza, Vitor Dos Santos
;
Rosa, Leonardo Sousa
;
Soares, Victor Del Vecchio
;
Crumo, Carolina Assuncao
;
Borin, Ivana Aparecida
;
Ferrari, Jefferson Luis
;
Goncalves, Rogeria Rocha
Total Authors: 9
|
| Document type: | Journal article |
| Source: | RONTIERS IN CHEMISTR; v. 10, p. 12-pg., 2022-07-04. |
| Abstract | |
This paper reports on the preparation of Er3+/Yb3+/Tm3+, Er3+/Yb3+/Nd3+, and Er3+/Tm3+/Nd3+ triply doped and Er3+-doped SiO2-Ta2O5 glass ceramic nanocomposites and active planar waveguides by the sol-gel process using the dip-coating technique as deposition method. The investigation of their structural, morphological, and luminescent properties using XRD, AFM, and photoluminescence analysis, are reported here. The XRD results showed the presence of L-Ta2O5 nanocrystals dispersed in the SiO2-based amorphous host for all the nanocomposites and films. The rare earth ion (RE3+) doping concentration affected both the crystallinity, and the crystallite sizes of the Ta2O5 dispersed into SiO2-Ta2O5 nanocomposites and waveguides. AFM characterization revealed crack free and smooth surface roughness and differences in viscoelasticity on the Er3+-doped SiO2-Ta2O5 films surface, which allows the identification of Ta2O5 nanocrystals on the SiO2 amorphous host. The Er3+ doped and triply doped SiO2-Ta2O5 nanocomposites displayed broad- and super broadband NIR emissions with a FWHM up to 173 nm achieved in the telecom wavelengths. The lifetime of the I-4(13/2) emitting level of the Er3+-doped SiO2-Ta2O5 waveguides is strongly dependent on Er3+ concentration and an emission quenching was negligible up to 0.81 mol%. The structural and luminescent investigations indicated that RE3+-doped SiO2-Ta2O5 glass ceramics are promising candidates for photonic applications in optical devices operating in wide wavelengths at the telecom bands. (AU) | |
| FAPESP's process: | 20/05319-9 - Multifunctional plataforms based on lanthanide doped nanostructured luminescent materials for potential photonic and theranostic applications |
| Grantee: | Rogéria Rocha Gonçalves |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 17/10423-7 - Broad band NIR emission from nanostructured Rare earth doped Nb2O5 and Ta2O5 derived materials for photonic applications as optical amplifiers and energy converters. |
| Grantee: | Fábio José Caixeta |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 18/18213-4 - Synthesis of luminescent multifunctional nanomaterials based on fluorides and oxides doped with rare earths for Teranostic applications |
| Grantee: | Karmel de Oliveira Lima |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |