2021
DOI: 10.1039/d1tc01419f
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The effects of dopant concentration and excitation intensity on the upconversion and downconversion emission processes of β-NaYF4:Yb3+,Er3+ nanoparticles

Abstract: The dopant concentration of lanthanide ions in photon-upconversion nanoparticles (UCNPs) remains one of the key points to boost these nanomaterials' brightness and, therefore, their application development. Here, we analyzed the...

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Cited by 17 publications
(7 citation statements)
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“…Unequal numbers of sensitizer and emitter ions in each nanoparticle could affect the resulting upconversion brightness 36 . To explore the effect of topological arrangement on upconversion brightness without the confounding effect of differences in ion number, we made all the upconversion nanoparticles with the same outer diameter and the same thickness of the inert outer shell (Fig.…”
Section: Resultsmentioning
confidence: 99%
“…Unequal numbers of sensitizer and emitter ions in each nanoparticle could affect the resulting upconversion brightness 36 . To explore the effect of topological arrangement on upconversion brightness without the confounding effect of differences in ion number, we made all the upconversion nanoparticles with the same outer diameter and the same thickness of the inert outer shell (Fig.…”
Section: Resultsmentioning
confidence: 99%
“…56,57 The τ decay is 140 μs (330 μs) for the green (red) transition, in agreement with previous reports. 49,59,60 The presence of the nanoantennas enables a reduction in τ rise and τ decay for both transitions, as shown in Fig. 3c, d and Table 1.…”
Section: Resultsmentioning
confidence: 80%
“…According to the literature, 113 the absorption region of Yb 3+ at 980 nm is 1.2 × 10 −20 cm 2 , which is much higher than that of Er 3+ (1.7 × 10 −21 cm 2 ). Yingying Li et al 114 broke through the traditional Yb, Er co-doped NaLnF 4 matrix nanoprobe 115 and innovatively synthesized NaErF 4 @NaYbF 4 core–shell nanoparticles. This method of isolating the sensitizer from the luminescence center effectively improves the emissive power of Er at 1525 nm.…”
Section: Methods Of Enhancing Luminescencementioning
confidence: 99%