English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Cubic versus hexagonal – phase, size and morphology effects on the photoluminescence quantum yield of NaGdF4:Er3+/Yb3+ upconverting nanoparticles

Authors

Quintanilla,  Marta
External Organizations;

Hemmer,  Eva
External Organizations;

Marques-Hueso,  Jose
External Organizations;

Rohani,  Shadi
External Organizations;

Lucchini,  Giacomo
External Organizations;

Wang,  Miao
External Organizations;

Zamani,  Reza R.
External Organizations;

/persons/resource/roddatis

Roddatis,  Vladimir
3.5 Interface Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Speghini,  Adolfo
External Organizations;

Richards,  Bryce S.
External Organizations;

Vetrone,  Fiorenzo
External Organizations;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in GFZpublic
Supplementary Material (public)
There is no public supplementary material available
Citation

Quintanilla, M., Hemmer, E., Marques-Hueso, J., Rohani, S., Lucchini, G., Wang, M., Zamani, R. R., Roddatis, V., Speghini, A., Richards, B. S., Vetrone, F. (2022): Cubic versus hexagonal – phase, size and morphology effects on the photoluminescence quantum yield of NaGdF4:Er3+/Yb3+ upconverting nanoparticles. - Nanoscale, 14, 4, 1492-1504.
https://doi.org/10.1039/D1NR06319G


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5011461
Abstract
Upconverting nanoparticles (UCNPs) are well-known for their capacity to convert near-infrared light into UV/visible light, benefitting various applications where light triggering is required. At the nanoscale, loss of luminescence intensity is observed and thus, a decrease in photoluminescence quantum yield (PLQY), usually ascribed to surface quenching. We evaluate this by measuring the PLQY of NaGdF4:Er3+,Yb3+ UCNPs as a function of size (ca. 15 to 100 nm) and shape (spheres, cubes, hexagons). Our results show that the PLQY of α-phase NaGdF4 Er3+,Yb3+ surpasses that of β-NaGdF4 for sizes below 20 nm, an observation related to distortion of the crystal lattice when the UCNPs become smaller. The present study also underlines that particle shape must not be neglected as a relevant parameter for PLQY. In fact, based on a mathematical nucleus/hull volumetric model, shape was found to be particularly relevant in the 20 to 60 nm size range of the investigated UCNPs.