Recent advances in enhanced luminescence upconversion of lanthanide-doped NaYF4 phosphors

D Kumar, K Verma, S Verma, B Chaudhary… - Physica B: Condensed …, 2018 - Elsevier
NaYF 4 is regarded as the best upconversion (UC) matrix owing to its low phonon energy,
more chemical stability, and a superior refractive index. This review reports on the various …

A mechanistic understanding of nonclassical crystal growth in hydrothermally synthesized sodium yttrium fluoride nanowires

AB Bard, X Zhou, X ** towards boosting upconversion luminescence in gadolinium vanadate
A Chauhan, S Kataria, D Busko, FA Cardona… - Journal of Materials …, 2021 - pubs.rsc.org
Metal co-do** is a popular approach for boosting two-photon upconversion (UC)
luminescence in phosphors. The underlying mechanisms of this enhancement are still …

Effective Shielding of NaYF4:Yb3+,Er3+ Upconverting Nanoparticles in Aqueous Environments Using Layer-by-Layer Assembly

E Palo, S Lahtinen, H Päkkilä, M Salomäki… - Langmuir, 2018 - ACS Publications
Aqueous solutions are the basis for most biomedical assays, but they quench the
upconversion luminescence significantly. Surface modifications of upconverting …

Highly uniform up-converting nanoparticles: Why you should control your synthesis even more

E Palo, M Tuomisto, I Hyppänen, HC Swart… - Journal of …, 2017 - Elsevier
Abstract Luminescent β-NaYF 4: Yb 3+, Er 3+(x Yb: 0.17, x Er: 0.03) nanomaterials were
synthesized for use as labels for biomedical applications with high temperature co …

Restraining fluoride loss from NaYF4: Yb3+, Er3+ upconverting nanoparticles in aqueous environments using crosslinked poly (acrylic acid)/poly (allylamine …

E Palo, M Salomäki, M Lastusaari - Journal of colloid and interface science, 2019 - Elsevier
The use of upconverting nanoparticles in various applications in aqueous media relies on
their surface modifications as most synthesis routes yield hydrophobic particles. However …

Highly efficient infrared to visible up-conversion emission tuning from red to white in Eu/Yb co-doped NaYF4 phosphor

TK Pathak, A Kumar, LJB Erasmus, A Pandey… - … Acta Part A: Molecular …, 2019 - Elsevier
Abstract Eu/Yb co-doped NaYF 4 phosphors have been synthesized by the combustion
method. The Eu do** was fixed and the effect of Yb do** concentration on the structural …

Intense UV upconversion through highly sensitized NaRF 4: Tm (R: Y, Yb) crystals

V Kale, M Lastusaari, J Hölsä, T Soukka - RSC Advances, 2015 - pubs.rsc.org
Photon upconverting luminescent hexagonal NaRF4: Tm (0.5 mol%)(R: Y3+, Yb3+) crystals
with Yb3+ concentrations between 20 and 99.5 mol% were synthesized by a modified …

Enhancement of blue upconversion luminescence in hexagonal NaYF4:Yb,Tm by using K and Sc ions

V Kale, T Soukka, J Hölsä, M Lastusaari - Journal of nanoparticle research, 2013 - Springer
Abstract Hexagonal (β)-NaYF 4 is recognized as one of the most efficient hosts for NIR to
blue and green upconversion (UC). A new method to tune the blue UC emission in β-NaYF …

Thermal behaviour of the NaYF4:Yb3+,R3+ materials

T Laihinen, M Lastusaari, L Pihlgren… - Journal of Thermal …, 2015 - Springer
Abstract The NaYF 4: Yb 3+, R 3+(R: none, Pr, Nd, Sm, Eu, Tb or Dy) materials were
prepared with selected dopant concentrations, using co-precipitation synthesis, to study the …