Upconversion from fluorophosphate glasses prepared with NaYF₄:Er³⁺,Yb³⁺ nanocrystals

Abstract

The direct doping method was applied to fabricate upconverter fluorophosphate glasses in the system (90NaPO 3 -(10-x)Na 2 O-xNaF) (mol%) by adding ,Yb 3+ nanocrystals-containing glasses was observed using a 980 nm pumping, the intensity of which depends on the glass composition and on the direct doping parameters (T doping and dwell time). The strongest upconversion was obtained from the glass with x ¼ 10 prepared using a T doping of 550 C and a 3 min dwell time. Finally, we showed that the upconversion, the emission at 1.5 mm and of the transmittance spectra of the nanocrystals-containing glasses could be measured to verify if decomposition of the nanocrystals occurred in glass melts during the preparation of the glasses.

Spectroscopic Properties of Er3+-Doped Particles-Containing Phosphate Glasses Fabricated Using the Direct Doping Method

“…Additionally, the Er 3+ : 4 I 13/2 lifetime depends on the glass composition: independently of the particles, the Er 3+ : 4 I 13/2 lifetimes of the NaPF10 glasses are the shortest, thus suggesting that the particles are less degraded in the NaPF10 glass than in the NaPF0 one. Similar results were reported in Reference [25].…”

“…In order to limit the degradation of the particles during the glass preparation, new glasses with a lower melting temperature and with a composition of 90NaPO 3 -(10 − x)Na 2 O-xNaF, with x = 0 (NaPF0) and 10 (NaPF10) (in mol %), were investigated as an alternative host for the Er 2 O 3 -doped particles. The optimization of the direct doping method can be found in Reference [25]; the Er 2 O 3 -doped particles were added at 550 °C and the dwell time was 3 min. As opposed to the NaSrP glasses, the Er 2 O 3 -doped TiO 2 - and ZnO-containing glasses exhibited a light pink coloration, whereas the Er 2 O 3 -doped ZrO 2 -containing glasses were colorless.…”

“…Thus, innovative particles-containing glasses with specific particle compositions and nanostructures can be achieved by adding RE-doped particles in the glass batch after the melting process. Recently, up-conversion (UC) was obtained from phosphate glasses which contain only 0.01 at % of Er 3+ and 0.06 at % of Yb 3+ by adding NaYF 4 :Er 3+ , Yb 3+ nanoparticles (NPs) in the glass after the melting [25]. However, as explained in Reference [26], the main challenge with this novel route of preparing glasses is to balance the survival and dispersion of the particles in the glasses.…”

Recent Advances in Hybrid Optical Materials: Integrating Nanoparticles within a Glass Matrix

“…d) Adapted with permission 67b. Copyright 2018, Elsevier B.V. e) Adapted with permission 65a. Copyright 2018, Royal Society of Chemistry.…”

“…More recently, Petit's group has investigated the dissolution behavior of oxide PersL‐MPs and fluoride UCNPs in phosphate glasses with different compositions 65,67b,d. They found that, using the same doping temperature and dwell duration, Sr 4 Al 14 O 25 :Eu 2+ ,Dy 3+ particles (oxide PersL‐MPs) were prone to be dissolved to a larger extent by 90NaPO 3 –10NaF glass melt compared to 90NaPO 3 –10Na 2 O glass melt 67b.…”