Judd–Ofelt and energy-transfer analysis of Er3+ doped in CaSc2O4 ceramic samples

Georgescu, S.; Ştefan, Angela; Toma, O.

doi:10.1016/j.jlumin.2015.06.028

Cited by 15 publications

(1 citation statement)

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“…One phosphor that fulfills the design criteria for high efficiency is Ce 3+ -substituted CaSc 2 O 4 , the preparation of which has been reported by using a variety of methods, including laser-heated pedestal growth, , combustion synthesis, or conventional high-temperature methods . This host material (CaSc 2 O 4 ) has also been made luminescent by doping with Eu 2+ , Er 3+ , Ho 3+ , Tm 3+ and by codoping Ce 3+ with Tm 3+ /La 3+ /Tb 3+ and Yb 3+ . It has also been investigated for use as an up-conversion phosphor. − On the basis of X-ray scattering analyses, the host structure, CaSc 2 O 4 , depicted in Figure , contains distorted ScO 6 octahedra that form a three-dimensional network of edge- or corner-sharing polyhedra.…”

Section: Introductionmentioning

confidence: 99%

Correlating Local Compositions and Structures with the Macroscopic Optical Properties of Ce³⁺-Doped CaSc₂O₄, an Efficient Green-Emitting Phosphor

George¹,

Brgoch²,

Pell

et al. 2017

Chem. Mater.

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Calcium scandate (CaSc 2 O 4 ) substituted with small amounts (<1%) of Ce 3+ is a recently discovered bright-green-emitting phosphor with favorable light absorption and emission properties and robust temperature stability that make it wellsuited for solid-state white-lighting applications. Combined analyses of scattering, solidstate nuclear magnetic resonance (NMR), electron paramagnetic resonance (EPR), and photoluminescence measurements establish the compositional and structural origins of the macroscopic optical properties of this phosphor material. Simultaneous refinements of synchrotron X-ray and neutron diffraction data of Ce 3+ -doped CaSc 2 O 4 enable the average crystal structure to be determined, which is shown to correspond to an exceedingly rigid host structure, as corroborated by density functional theory (DFT) calculations. Such structural rigidity leads to high quantum efficiency, which is optimized by the substitution of as little as 0.5 mol % of Ce 3+ for Ca 2+ ions, with higher extents of Ce 3+ substitution leading to decreased photoluminescent quantum yields. Solid-state 43 Ca and 45 Sc magic-angle spinning (MAS) NMR spectra are sensitive to the effects of the paramagnetic Ce 3+ dopant ions on nearby atoms in the host structure and yield evidence for local structural distortions. EPR measurements provide direct insights on structures of the Ce 3+ ions, as a function of Ce 3+ substitution. The combined scattering and spectroscopic analyses yield detailed new understanding of the local and long-range structures of Ce 3+doped CaSc 2 O 4 , which account for the sensitive composition-dependent optical properties of this important phosphor material.

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Section: Introductionmentioning

confidence: 99%

Correlating Local Compositions and Structures with the Macroscopic Optical Properties of Ce³⁺-Doped CaSc₂O₄, an Efficient Green-Emitting Phosphor

George¹,

Brgoch²,

Pell

et al. 2017

Chem. Mater.

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Enhanced red and near-infrared upconversion luminescence properties in CaSc2O4 microcrystals

Wang

Zhang

et al. 2020

Chemical Physics Letters

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Infrared luminescent properties of Na5Lu9F32 single crystals co-doped Er3+/Yb3+ grown by Bridgman method

Wang

Xia

Feng

et al. 2016

Journal of Alloys and Compounds

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Judd–Ofelt and energy-transfer analysis of Er3+ doped in CaSc2O4 ceramic samples

Cited by 15 publications

References 56 publications

Correlating Local Compositions and Structures with the Macroscopic Optical Properties of Ce³⁺-Doped CaSc₂O₄, an Efficient Green-Emitting Phosphor

Correlating Local Compositions and Structures with the Macroscopic Optical Properties of Ce³⁺-Doped CaSc₂O₄, an Efficient Green-Emitting Phosphor

Enhanced red and near-infrared upconversion luminescence properties in CaSc2O4 microcrystals

Infrared luminescent properties of Na5Lu9F32 single crystals co-doped Er3+/Yb3+ grown by Bridgman method

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Judd–Ofelt and energy-transfer analysis of Er3+ doped in CaSc2O4 ceramic samples

Cited by 15 publications

References 56 publications

Correlating Local Compositions and Structures with the Macroscopic Optical Properties of Ce3+-Doped CaSc2O4, an Efficient Green-Emitting Phosphor

Correlating Local Compositions and Structures with the Macroscopic Optical Properties of Ce3+-Doped CaSc2O4, an Efficient Green-Emitting Phosphor

Enhanced red and near-infrared upconversion luminescence properties in CaSc2O4 microcrystals

Infrared luminescent properties of Na5Lu9F32 single crystals co-doped Er3+/Yb3+ grown by Bridgman method

Contact Info

Product

Resources

About

Correlating Local Compositions and Structures with the Macroscopic Optical Properties of Ce³⁺-Doped CaSc₂O₄, an Efficient Green-Emitting Phosphor

Correlating Local Compositions and Structures with the Macroscopic Optical Properties of Ce³⁺-Doped CaSc₂O₄, an Efficient Green-Emitting Phosphor