Tunable Visible Light and Energy Transfer Mechanism in Tm3+ and Silver Nanoclusters within Co-Doped GeO2-PbO Glasses
This study introduces a novel method for producing Ag nanoclusters (NCs) within GeO2-PbO glasses doped with Tm3+ ions. Sample preparation involved the melt-quenching method, employing adequate heat treatment to facilitate Ag NC formation. Absorption spectroscopy confirmed trivalent rare-earth ion incorporation. Ag NC identification and the amorphous structure were observed using transmission electron microscopy. A tunable visible emission from blue to the yellow region was observed. The energy transfer mechanism from Ag NCs to Tm3+ ions was demonstrated by enhanced 800 nm emission under 380 and 400 nm excitations, mainly for samples with a higher concentration of Ag NCs; moreover, the long lifetime decrease of Ag NCs at 600 nm (excited at 380 and 400 nm) and the lifetime increase of Tm3+ ions at 800 nm (excitation of 405 nm) corroborated the energy transfer between those species. Therefore, we attribute this energy transfer mechanism to the decay processes from S1→T1 and T1→S0 levels of Ag NCs to the 3H4 level of Tm3+ ions serving as the primary path of energy transfer in this system. GeO2-PbO glasses demonstrated potential as materials to host Ag NCs with applications for photonics as solar cell coatings, wideband light sources, and continuous-wave tunable lasers in the visible spectrum, among others.
Citação
@online{marcos_vinicius_de_morais2023,
author = {Marcos Vinicius De Morais , Nishimura and Augusto Anselmo ,
Amaro and Camila Dias Da Silva , Bordon and Jessica , Dipold and
Niklaus Ursus , Wetter and Luciana Reyes Pires , Kassab},
title = {Tunable Visible Light and Energy Transfer Mechanism in Tm3+
and Silver Nanoclusters within Co-Doped GeO2-PbO Glasses},
volume = {14},
number = {11},
date = {2023-11-09},
doi = {10.3390/mi14112078},
langid = {pt-BR},
abstract = {This study introduces a novel method for producing Ag
nanoclusters (NCs) within GeO2-PbO glasses doped with Tm3+ ions.
Sample preparation involved the melt-quenching method, employing
adequate heat treatment to facilitate Ag NC formation. Absorption
spectroscopy confirmed trivalent rare-earth ion incorporation. Ag NC
identification and the amorphous structure were observed using
transmission electron microscopy. A tunable visible emission from
blue to the yellow region was observed. The energy transfer
mechanism from Ag NCs to Tm3+ ions was demonstrated by enhanced 800
nm emission under 380 and 400 nm excitations, mainly for samples
with a higher concentration of Ag NCs; moreover, the long lifetime
decrease of Ag NCs at 600 nm (excited at 380 and 400 nm) and the
lifetime increase of Tm3+ ions at 800 nm (excitation of 405 nm)
corroborated the energy transfer between those species. Therefore,
we attribute this energy transfer mechanism to the decay processes
from S1→T1 and T1→S0 levels of Ag NCs to the 3H4 level of Tm3+ ions
serving as the primary path of energy transfer in this system.
GeO2-PbO glasses demonstrated potential as materials to host Ag NCs
with applications for photonics as solar cell coatings, wideband
light sources, and continuous-wave tunable lasers in the visible
spectrum, among others.}
}