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Tuomisto, M.
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article
Upconversion in low rare-earth concentrated phosphate glasses using direct NaYF4
Abstract
<p>Upconversion (UC) was obtained from phosphate glasses which contain only 0.01 at.% of Er<sup>3 +</sup> and 0.06 at.% of Yb<sup>3 +</sup>. The glasses were prepared using direct doping method by adding NaYF<sub>4</sub>:Er<sup>3 +</sup>, Yb<sup>3 +</sup> nanoparticles (NPs) into the glass at a doping temperature of 575 °C and 3 minute dwell time. The fraction of NP's survival during glass preparation can be augmented from 5 to 20% when replacing Na<sub>2</sub>O by NaF in the glass. Our study suggests that the corrosion behavior of the glass melt is an important parameter to consider in order to engineer new NPs-containing glasses with high UC efficiency.</p>