NDLI: Novel and easy access to highly luminescent Eu and Tb doped ultra-small CaF2, SrF2 and BaF2 nanoparticles

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Dalton Transactions Vol - 46 Issue - 8

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Dalton Transactions Vol - 46 Issue - 6

Dalton Transactions Vol - 46 Issue - 5

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Dalton Transactions Vol - 46 Issue - 2

Dalton Transactions Vol -39

Dalton Transactions Vol -0

Novel and easy access to highly luminescent Eu and Tb doped ultra-small CaF₂, SrF₂ and BaF₂ nanoparticles – structure and luminescence

Content Provider	Royal Society of Chemistry (RSC)
Author	Ritter, Benjamin Krahl, Thoralf Haida, Philipp Kemnitz, Erhard Rurack, Knut Scholz, Gudrun Gawlitza, Kornelia Fink, Friedrich
Copyright Year	2017
Abstract	A universal fast and easy access at room temperature to transparent sols of nanoscopic Eu3+ and Tb3+ doped CaF2, SrF2 and BaF2 particles via the fluorolytic sol–gel synthesis route is presented. Monodisperse quasi-spherical nanoparticles with sizes of 3–20 nm are obtained with up to 40% rare earth doping showing red or green luminescence. In the beginning luminescence quenching effects are only observed for the highest content, which demonstrates the unique and outstanding properties of these materials. From CaF2:Eu10 via SrF2:Eu10 to BaF2:Eu10 a steady increase of the luminescence intensity and lifetime occurs by a factor of ≈2; the photoluminescence quantum yield increases by 29 to 35% due to the lower phonon energy of the matrix. The fast formation process of the particles within fractions of seconds is clearly visualized by exploiting appropriate luminescence processes during the synthesis. Multiply doped particles are also available by this method. Fine tuning of the luminescence properties is achieved by variation of the Ca-to-Sr ratio. Co-doping with Ce3+ and Tb3+ results in a huge increase (>50 times) of the green luminescence intensity due to energy transfer Ce3+ → Tb3+. In this case, the luminescence intensity is higher for CaF2 than for SrF2, due to a lower spatial distance of the rare earth ions.
Starting Page	2925
Ending Page	2936
Page Count	12
File Format	HTM / HTML PDF
ISSN	14779226
Volume Number	46
Issue Number	9
Journal	Dalton Transactions
DOI	10.1039/c6dt04711d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Strontium fluoride Barium fluoride Dispersity Dopant Luminescence Photoluminescence Quantum Phonon Composite material
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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SYNTHESIS AND CHARACTERIZATION OF SrF2 AND SrF2:Ce3+ NANOPARTICLES FOR GAMMA RAY DETECTION

Lanthanide dopant-induced formation of uniform sub-10 nm active-core/active-shell nanocrystals with near-infrared to near-infrared dual-modal luminescence

Luminescence and photoionization processes of Yb2+ in CaF 2, SrF2 and BaF2

Luminescence and stability of Tb doped CaF₂ nanoparticles.

Thermal decay of photochromic color centers in CaF2, SrF2, and BaF2 crystals doped by La and Y impurities

Facile hydrothermal synthesis and luminescent properties of Eu-doped CaF2–YF3 alkaline-earth ternary fluoride microspheres

DEFECT RECOMBINATION AND AGGREGATIONRadiation induced point defects in CaF2, SrF2, BaF2 and MgF2

Structure and Luminescent Characteristics of Ba$_{3}$Tb(PO$_{4}$)$_{3}$ Doped with Eu$^{3+}$ Ions

ELECTRON PARAMAGNETIC RESONANCE OF Pu3+ IN CUBIC SYMMETRY SITES IN CaF2, SrF2 AND BaF2

Novel and easy access to highly luminescent Eu and Tb doped ultra-small CaF₂, SrF₂ and BaF₂ nanoparticles – structure and luminescence

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Novel and easy access to highly luminescent Eu and Tb doped ultra-small CaF2, SrF2 and BaF2 nanoparticles – structure and luminescence

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Novel and easy access to highly luminescent Eu and Tb doped ultra-small CaF₂, SrF₂ and BaF₂ nanoparticles – structure and luminescence