Synthesis and characterization of Er3+ doped CaF2 nanoparticles

Zhi, Guanglin; Song, Jinghong; Mei, Bingchu; Zhou, Weibing

doi:10.1016/j.jallcom.2011.06.084

Cited by 40 publications

(20 citation statements)

References 36 publications

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“…The average value of lattice constants were found in the range about 5.47-5.49 Å, which are in good agreement with calculated in the literatures [9,30]. with the increase in the Er 3+ doping concentration obviously.…”

Section: Methodssupporting

confidence: 90%

Microstructure and optical properties of hot-pressed Er:CaF2 transparent ceramics

Liu

Mei

Song

et al. 2015

Journal of Alloys and Compounds

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Section: Methodssupporting

confidence: 90%

Microstructure and optical properties of hot-pressed Er:CaF2 transparent ceramics

Liu

Mei

Song

et al. 2015

Journal of Alloys and Compounds

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“…Moreover, when trivalent erbium ions are incorporated in CaF 2 matrix lattice, its relatively low phonon frequency (~322 cm −1 ) reduces the nonradiative relaxation process between adjacent energy levels, and thus a high‐efficiency upconversion and infrared emission can be obtained. Many studies on Er‐doped CaF 2 materials, such as nanopowders, single crystals, and glass‐ceramics have been reported, and Er:CaF 2 transparent ceramics were also fabricated by hot‐pressing (HP) single crystals. The purpose of this work was to demonstrate the feasibility of using nanoparticles as starting material through a hot‐pressing process to make transparent Er:CaF 2 ceramics.…”

Section: Introductionmentioning

confidence: 99%

Optical Characterizations of Hot‐Pressed Erbium‐Doped Calcium Fluoride Transparent Ceramic

et al. 2014

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Nanoparticles of erbium-doped calcium fluoride were synthesised by the coprecipitation method. Micromorphology of the obtained nanoparticles was observed by transmission electron microscopy. The nanoparticles were hot-pressed in a vacuum environment to achieve Er:CaF 2 transparent ceramic. X-ray diffraction analysis confirmed the crystallization of a single fluorite phase after sintered. Transmittance spectrum of Er: CaF 2 ceramic sample was measured, and the transmittance at 1200 nm reached about 87%. Microstructures were characterized using field-emission scanning electron microscopy. The luminescence spectrum of Er:CaF 2 transparent ceramics under 488-and 978-nm excitation was measured and discussed. It was evidenced that strong cross-relaxation processes between Er 3+ ions occur at high dopant concentration, and favoring the red emission at the expense of the green one.

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“…Up until now, CaF has been used in a limited number of biomedical applications [22][23][24][25][43][44][45][46][47][48][49][50][51][52]. For example, CaF 2 has been applied in conjunction with SiPMs in gamma spectrometry, and due to its biocompatibility and the stability of the material, it has proven to be significant for fluorescent labeling in biological applications.…”

Section: Introductionmentioning

confidence: 99%

Absolute Luminescence Efficiency of Europium-Doped Calcium Fluoride (CaF2:Eu) Single Crystals under X-ray Excitation

et al. 2019

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The absolute luminescence efficiency (AE) of a calcium fluoride (CaF2:Eu) single crystal doped with europium was studied using X-ray energies met in general radiography. A CaF2:Eu single crystal with dimensions of 10 × 10 × 10 mm3 was irradiated by X-rays. The emission light photon intensity of the CaF2:Eu sample was evaluated by measuring AE within the X-ray range from 50 to 130 kV. The results of this work were compared with data obtained under similar conditions for the commercially employed medical imaging modalities, Bi4Ge3O12 and Lu2SiO5:Ce single crystals. The compatibility of the light emitted by the CaF2:Eu crystal, with the sensitivity of optical sensors, was also examined. The AE of the 10 × 10 × 10 mm3 CaF2:Eu crystal peaked in the range from 70 to 90 kV (22.22 efficiency units; E.U). The light emitted from CaF2:Eu is compatible with photocathodes, charge coupled devices (CCD), and silicon photomultipliers, which are used as radiation sensors in medical imaging systems. Considering the AE results in the examined energies, as well as the spectral compatibility with various photodetectors, a CaF2:Eu single crystal could be considered for radiographic applications, including the detection of charged particles and soft gamma rays.

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Synthesis and characterization of Er3+ doped CaF2 nanoparticles

Cited by 40 publications

References 36 publications

Microstructure and optical properties of hot-pressed Er:CaF2 transparent ceramics

Microstructure and optical properties of hot-pressed Er:CaF2 transparent ceramics

Optical Characterizations of Hot‐Pressed Erbium‐Doped Calcium Fluoride Transparent Ceramic

Absolute Luminescence Efficiency of Europium-Doped Calcium Fluoride (CaF2:Eu) Single Crystals under X-ray Excitation

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