Excited states dynamics in the ternary praseodymium and ytterbium/praseodymium halides

Legendziewicz, J.; Cybińska, Joanna; Boulon, G.; Meyer, Gerd

doi:10.1016/j.optmat.2006.05.013

Cited by 8 publications

(3 citation statements)

References 30 publications

(33 reference statements)

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“…Efficient emission in the IR range has also been reported in K 2 LaCl 5 :U 3+ . K 2 La X 5 :Pr crystals have been studied and upconversion ability of Pr 3+ ions has been demonstrated .…”

Section: Introductionmentioning

confidence: 88%

Wet‐chemical preparation of Ce³⁺‐activated K₂LaX₅ (X = Cl, Br or I) phosphors

Ingole¹,

Joshi²,

Moharil

et al. 2011

Luminescence

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There has been a renewed interest in Ce(3+) -activated halide phosphors due to applications as scintillation detectors, especially for positron emission tomography. For K(2) LaCl(5), the light yield increases and the energy resolution (FWHM) improves with increasing Ce(3+) doping. K(2) LaX(5) compounds are also important as laser hosts for the mid-IR range. K(2) LaCl(5):Nd crystals show bright mid-IR luminescence, which makes them a candidate for IR laser materials. Efficient emission in the IR range has also been reported in K(2) LaCl(5):U(3+). A one-step, wet chemical process for preparing Ce(3+)-activated K(2) LaCl(5) phosphor is described. Intense luminescence of Ce(3+) can be observed in the as-prepared powders without any heat treatment. The availability of such powders opens up several exciting possibilities, such as growing single crystals without going to the high temperatures required for melting the constituent chlorides, or even obtaining processed, transparent, Ce(3+)-activated materials without taking recourse to crystal growth.

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“…Efficient emission in the IR range has also been reported in K 2 LaCl 5 :U 3+ . K 2 La X 5 :Pr crystals have been studied and upconversion ability of Pr 3+ ions has been demonstrated .…”

Section: Introductionmentioning

confidence: 88%

Wet‐chemical preparation of Ce³⁺‐activated K₂LaX₅ (X = Cl, Br or I) phosphors

Ingole¹,

Joshi²,

Moharil

et al. 2011

Luminescence

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“…The same systems can be model objects for the study of luminescence processes such as up-conversion, downconversion, cross-relaxation, etc in impurity rare-earth ions [2]. Unfortunately, the bulk crystals of these compounds possess a considerable hygroscopicity.…”

Section: Introductionmentioning

confidence: 99%

“…La-containing LaX 3 and K 2 LaX 5 (X = Cl, Br, I) single crystals doped with Ce 3+ ions have been extensively studied in recent years due to their attractive scintillation characteristics: high scintillation light yield and good energy resolution [1]. The same systems can be model objects for the study of luminescence processes such as up-conversion, downconversion, cross-relaxation, etc in impurity rare-earth ions [2]. Unfortunately, the bulk crystals of these compounds possess a considerable hygroscopicity.…”

Section: Introductionmentioning

confidence: 99%

Luminescence of Ce doped LaCl₃microcrystals incorporated into a single-crystalline NaCl host

Vistovskyy

Savchyn

Stryganyuk³

et al. 2008

J. Phys.: Condens. Matter

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Formation of LaCl 3 :Ce microcrystals embedded in an NaCl host has been revealed for NaCl-LaCl 3 (1 mol%)-CeCl 3 (0.05 mol%) composition by means of scanning electron microscopy (SEM) and luminescence spectroscopy techniques. Scanning electron microscopy has shown the size of LaCl 3 :Ce microcrystals to be in the 10-100 μm range. Spectral-kinetic characteristics of NaCl-LaCl 3 (1 mol%)-CeCl 3 (0.05 mol%) luminescence have been studied upon excitation in the ultra violet-visible ultraviolet (UV-VUV) spectral range. Luminescent properties of LaCl 3 :Ce microcrystals in NaCl-LaCl 3 (1 mol%)-CeCl 3 (0.05 mol%) are shown to be substantially similar to those of bulk LaCl 3 :Ce (1 mol%) crystal. The energy transfer mechanism from the NaCl host and LaCl 3 microcrystal to cerium centres is discussed.

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Scintillation properties of K₂LaCl₅:Ce microcrystals embedded in KCl host

Stryganyuk

Savchyn

Vistovskyy

et al. 2009

Physica Status Solidi (a)

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Scintillation properties under γ‐ray excitation and luminescence properties under X‐ray excitation of KCl with embedded K2LaCl5:Ce microphase crystals have been investigated. KCl–LaCl3(2 mol%)–CeCl3(0.1 mol% and 0.02 mol%) show scintillation yields of 15000–18000 photons/MeV with two decay time components of 300–420 ns and 1.2–1.9 µs. These properties compare with those of K2LaCl5:Ce bulk crystal. The luminescence study and scanning electron microscopy data indicate that the KCl–LaCl3–CeCl3 system contains K2LaCl5:Ce microcrystals of 10–50 μm size. The decrease of the intensity contribution and decay times of the slow component in the scintillation pulse of microcrystals compared with those in K2LaCl5:Ce single crystals are discussed. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Excited states dynamics in the ternary praseodymium and ytterbium/praseodymium halides

Cited by 8 publications

References 30 publications

Wet‐chemical preparation of Ce³⁺‐activated K₂LaX₅ (X = Cl, Br or I) phosphors

Wet‐chemical preparation of Ce³⁺‐activated K₂LaX₅ (X = Cl, Br or I) phosphors

Luminescence of Ce doped LaCl₃microcrystals incorporated into a single-crystalline NaCl host

Scintillation properties of K₂LaCl₅:Ce microcrystals embedded in KCl host

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Excited states dynamics in the ternary praseodymium and ytterbium/praseodymium halides

Cited by 8 publications

References 30 publications

Wet‐chemical preparation of Ce3+‐activated K2LaX5 (X = Cl, Br or I) phosphors

Wet‐chemical preparation of Ce3+‐activated K2LaX5 (X = Cl, Br or I) phosphors

Luminescence of Ce doped LaCl3microcrystals incorporated into a single-crystalline NaCl host

Scintillation properties of K2LaCl5:Ce microcrystals embedded in KCl host

Contact Info

Product

Resources

About

Wet‐chemical preparation of Ce³⁺‐activated K₂LaX₅ (X = Cl, Br or I) phosphors

Wet‐chemical preparation of Ce³⁺‐activated K₂LaX₅ (X = Cl, Br or I) phosphors

Luminescence of Ce doped LaCl₃microcrystals incorporated into a single-crystalline NaCl host

Scintillation properties of K₂LaCl₅:Ce microcrystals embedded in KCl host