Down- and up-converting dual-mode YPO4:Yb(3+),Tb(3+) nanocrystals: synthesis and spectroscopic properties.
PBN-AR
Instytucja
Wydział Chemii (Uniwersytet im. Adama Mickiewicza w Poznaniu)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
DALTON TRANSACTIONS
ISSN
1477-9226
EISSN
Wydawca
ROYAL SOC CHEMISTRY
DOI
URL
Rok publikacji
2014
Numer zeszytu
46
Strony od-do
17255-17264
Numer tomu
43
Identyfikator DOI
Liczba arkuszy
Autorzy
(liczba autorów: 4)
Pozostali autorzy
+ 2
Streszczenia
Język
en
Treść
Tetragonal YPO4 nanocrystals doped with Yb(3+) and Tb(3+) ions were synthesized by 900 °C annealing of precursors obtained with a co-precipitation method in the presence of glycerine. These materials exhibited intense green luminescence under ultraviolet excitation and up-conversion emission from the (5)D3 and (5)D4 Tb(3+) excited states after irradiation with near infrared light (lambda = 980 nm). The structure and morphology of the products were analysed by recording X-ray diffraction patterns and transmission electron microscopy images. The obtained nanomaterials were single-phased with spherical shaped nanocrystals that had an average size of 18 ± 3 nm. The spectroscopic properties of YPO4:Yb(3+),Tb(3+) nanocrystals were investigated based on their excitation and emission spectra. The time-resolved luminescence traces were measured, and the luminescence lifetimes of Tb(3+) and Yb(3+) ions were calculated. The most effective dopant concentrations were determined to be 5\% Yb(3+) and 15\% Tb(3+), which exhibited the most intense ultraviolet excited emission and up-conversion. Because the integral intensity was observed to be dependent on the power of the pumping laser, a cooperative energy transfer (CET) mechanism underlying the observed up-conversion was proposed.
Cechy publikacji
discipline:Chemia
discipline:Fizyka
discipline:Inżynieria materiałowa
discipline:Chemistry
discipline:Physics
discipline:Materials science
Original article
Original article presents the results of original research or experiment.
Oryginalny artykuł naukowy
Oryginalny artykuł naukowy przedstawia rezultaty oryginalnych badań naukowych lub eksperymentu.
Inne
System-identifier
PBN-R:764041
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