Up-conversion green emission of Yb3+/Er3+ ions doped YVO4 nanocrystals obtained via modified Pechini's method
PBN-AR
Instytucja
Wydział Chemii (Uniwersytet im. Adama Mickiewicza w Poznaniu)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Optical Materials (35pkt w roku publikacji)
ISSN
0925-3467
EISSN
Wydawca
ELSEVIER SCIENCE BV
DOI
URL
Rok publikacji
2017
Numer zeszytu
SI
Strony od-do
128-134
Numer tomu
74
Identyfikator DOI
Liczba arkuszy
Autorzy
Pozostali autorzy
+ 1
Słowa kluczowe
en
Up-conversion;
Luminescence;
Nanomaterials;
Lanthanide vanadates;
Sol-gel synthesis
Streszczenia
Język
en
Treść
A series of lanthanide doped yttrium vanadates were prepared by Pechini's method (sol-gel process). The as-prepared precursors, in the presence of citric acid, were calcined in the temperature range of 600 900 degrees C. The obtained products were composed of small nanoparticles, in the size range of 20-50 nm, depending on the annealing temperature, exhibiting a bright green up-conversion emission, under NIR laser irradiation, and emission lifetimes in the range of 4.7-18.3 mu s. Their structural, morphological and spectroscopic properties were investigated in detail by XRD, HR-TEM including FFT analysis, EDX and spectroscopic techniques (emission, power dependence and emission kinetics). The luminescence quenching phenomenon, manifested in a decrease of up-conversion intensity and shortening of emission lifetime, was observed with increasing of the Yb3+ ion concentration and decreasing the particle size. The optimal concentration of the Yb3+ ions was found to be 15 mol% (YVO4: Yb3+ 15 mol%, Er3+ 2 mol%). (C) 2017 Elsevier B.V. All rights reserved.
Inne
System-identifier
PX-5b06dc22d5deb7142095f92a
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