Tessitore, Gabriella; Mudring, A.-V.; Krämer, Karl (2017). Room temperature synthesis of β-NaGdF4: RE3+ (RE = Eu, Er) nanocrystallites and their luminescence. Journal of luminescence, 189, pp. 91-98. Elsevier 10.1016/j.jlumin.2017.03.021
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A roomtemperaturesynthesiswasdevelopedforphasepure β-NaGdF4 nanocrystallitesaswellas5,10,
and 20%Eu3þ or 5%Er3þ doped material.RareearthacetatesandNaClreactina1:2Mratiowitha
variableexcessofNH4F inethyleneglycolwithin24hours.Sincethethermodynamicstabilityofthe
hexagonalphasedecreasesalongthelanthanideseries,alargerexcessofNH4F wasrequiredforthe
synthesis ofluminescentsamplesdopedwiththesmallerEr3þ ions thanforEu3þ doped orpure β-
NaGdF4. ThematerialswerecharacterizedbypowderX-raydiffraction,electronmicroscopy,andlumi-
nescence spectroscopy.TheEu3þ-doped samplesshow 5D0-7FJ and 5D1-7FJ luminescence afterEu3þ
excitationat394nmorGd3þ excitationat273nmand308nm.Theratioof 5D1 vs. 5D0 luminescence is
influenced bytheexcitationwavelengthandtheEu3þ concentration. TheEr3þ-doped samplesshow
green andredupconversionluminescence,respectively,fromthe 2H11/2þ4S3/2-4I15/2 and 4F9/2-4I15/2
transitions after970nmexcitation.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP) |
UniBE Contributor: |
Tessitore, Gabriella, Krämer, Karl |
Subjects: |
500 Science > 540 Chemistry |
ISSN: |
0022-2313 |
Publisher: |
Elsevier |
Funders: |
[103] European Commission FP7 |
Language: |
English |
Submitter: |
Karl Krämer |
Date Deposited: |
29 Nov 2017 12:35 |
Last Modified: |
05 Dec 2022 15:08 |
Publisher DOI: |
10.1016/j.jlumin.2017.03.021 |
BORIS DOI: |
10.7892/boris.107311 |
URI: |
https://boris.unibe.ch/id/eprint/107311 |
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