Does BaYF5 nanocrystals exist?–The BaF2-YF3 solid solution revisited using photoluminescence spectroscopy.
PBN-AR
Instytucja
Wydział Chemii (Uniwersytet Wrocławski)
Źródłowe zdarzenia ewaluacyjne
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Journal of Alloys and Compounds
ISSN
0925-8388
EISSN
1873-4669
Wydawca
Elsevier
Rok publikacji
2016
Numer zeszytu
Strony od-do
258-264
Numer tomu
673
Identyfikator DOI
Liczba arkuszy
Autorzy
(liczba autorów: 2)
Słowa kluczowe
eng
BaF2-YF3 system
Fluoride nanoparticles
Nanofluorides
Upconversion
Streszczenia
Język
eng
Treść
During thermolysis of metal trifluoroacetates in high boiling organic solvents the two Ba1U+0026amp;minus;xRExF2+xU+0026amp;nbsp;phases with cubic fluorite-type structure are formed in BaF2-YF3U+0026amp;nbsp;system. In contrast to previous reports formation of so-called U+0026amp;lsquo;BaYF5U+0026amp;rsquo; nanocrystals was not observed. Besides the X-ray diffraction analysis the samples doped with optically active Eu3+U+0026amp;nbsp;and Er3+U+0026amp;nbsp;ions were characterized with photoluminescence spectroscopy and results provided by both methods corroborates each other. Upconversion emission observed under excitation at 980U+0026amp;nbsp;nm for the Ba1U+0026amp;minus;xYxF2+xU+0026amp;nbsp;phase co-doped with Yb3+U+0026amp;nbsp;and Er3+U+0026amp;nbsp;ions is strongly composition dependent. Its intensity increases with increasing of REF3U+0026amp;nbsp;content for 0.2U+0026amp;nbsp;U+0026amp;lt;U+0026amp;nbsp;xU+0026amp;nbsp;U+0026amp;lt;U+0026amp;nbsp;0.45, whereas the opposite trend is evident for xU+0026amp;nbsp;U+0026amp;gt;U+0026amp;nbsp;0.45 and upconversion emission is totally quenched for xU+0026amp;nbsp;U+0026amp;gt;U+0026amp;nbsp;0.6. The important outcome of the present study is that compositions other than that with xU+0026amp;nbsp;=U+0026amp;nbsp;0.5 should be probed to fully benefit from photoluminescence potential of Ba1U+0026amp;minus;xRExF2+xU+0026amp;nbsp;nanofluoride phases activated with lanthanide ions.
Cechy publikacji
original-article
Inne
System-identifier
2016CH7783
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