High pressure spectroscopy of rare earth ions doped crystals—new results

Grinberg, M.

doi:10.1016/j.optmat.2004.10.029

Cited by 35 publications

(27 citation statements)

References 42 publications

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“…under a hydrostatic pressure, the coordination symmetry issue is no longer effective. This consideration can explain why the observed stress and temperature effects in the present experiment are different to those reported in previous publications [6,7], whilst the phenomena is more complicated than the prediction of the nephelauxetic effect, crystal field theory, and the Jahn-Teller effect, e.g. the remaining problem in multi-peak fitting.…”

Section: +contrasting

confidence: 81%

“…Evidence for this lies in the fact that the two emission bands stay merged as one observable band, not separating under normal pressure [6,7] or stress (Fig. 3).…”

Section: Resultsmentioning

confidence: 97%

“…For this phosphor the parity allowed 5d-4f inter-configurational transitions of Ce 3+ are highly sensitive to the change of environmental factors because the d-electrons are in the outer shell. As a consequence the phosphor is known to exhibit pressure-dependent fluorescence which may be attributed to the change of the Ce-O bond length [6]. Therefore, the radiative transitions of Ce 3+ -doped phosphors are expected to be sensitive to changes in stress and/or temperature which lead to similar Ce-O bond changes in the lattice of the matrix material.…”

Section: Introductionmentioning

confidence: 99%

“…The emission spectrum of YAG:Ce reveals two highly overlapping bands. The application of high pressure drives the two bands to shift towards a lower energy with almost the same piezo-spectroscopic coefficient [6,7]. Determining the peak position of the resultant broad band is imprecise, and as a consequence, it is difficult to accurately extract shifts in the peak position particularly at a low pressure or under small magnitudes of applied stress.…”

Section: Introductionmentioning

confidence: 99%

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Stress- and Temperature-Dependent Wideband Fluorescence of a Phosphor Composite for Sensing Applications

Zhang

Baxter

et al. 2016

Exp Mech

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As both stress and temperature can alter the lattice of a solid phosphor in a similar way, the dopant rare-earth ion may be used as a probe for either parameter using the same sensing mechanism. Here, a wideband phosphor, YAG:Ce is used as a micro stress sensor at very low magnitudes of compressive stress. The sensing resolution can be smaller than 0.06 N/mm 2 in the range of 0~1.2 N/mm 2 with a sensitivity of 11 cm −1 /MPa. The sensitivity is about a hundred times larger than the coefficient reported under hydrostatic pressure. The barycenter energy of the emission band of a phosphor can be used to indicate stress and/or temperature change, producing a precision beyond the spectroscopic resolution limit. The sensing functions obtained from the barycenter shift are superior to those from peak shifts. The stress/temperature dependent barycenter shift of the observed fluorescence bands of YAG:Ce were similar in magnitude. Mechanisms involving the nephelauxetic effect, crystal field effect and site symmetry of dopant ions are explored as explanations of the experimental phenomena.

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Section: +contrasting

confidence: 81%

“…Evidence for this lies in the fact that the two emission bands stay merged as one observable band, not separating under normal pressure [6,7] or stress (Fig. 3).…”

Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stress- and Temperature-Dependent Wideband Fluorescence of a Phosphor Composite for Sensing Applications

Zhang

Baxter

et al. 2016

Exp Mech

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“…, (23). This contribution is dedicated to the investigations of ITE states in Eu 2+ doped fluorides and Pr 3+ doped oxides.…”

Section: +mentioning

confidence: 99%

High Pressure Study of Localized States Related to Lanthanide Ions in Solids

Grinberg

2009

ECS Trans.

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The latest results on high pressure investigations of luminescence related to Pr 3+ and Eu 2+ in different lattices are presented in this contribution. In the latter case the influence of pressure on anomalous luminescence in Ba x Sr 1-x F 2 for x=0, 0.3 and 0.5 and 1, and the LiBaF 3 :Eu 2+ system as a function of pressure are presented and discussed. A theoretical model describing an impurity trapped exciton as a system where the first carrier is localized at the impurity and the second one is captured by the Coulomb potential at Rydberg-like states is developed. The model is used to analyze the anomalous luminescence in Eu 2+ doped fluorides and pressure quenching of Pr 3+ luminescence in oxides. The model explains the differences in the formation of an impurity trapped exciton in dependence, if the first excited impurity state belongs to 4f n or 4f n-1 5d 1 electronic configurations.

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Principles of Energetic Structure and Excitation-Energy Transfer Based on High-Pressure Measurements

Grinberg

2016

Phosphors, Up Conversion Nano Particles, Quantum Dots and Their Applications

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High pressure spectroscopy of rare earth ions doped crystals—new results

Cited by 35 publications

References 42 publications

Stress- and Temperature-Dependent Wideband Fluorescence of a Phosphor Composite for Sensing Applications

Stress- and Temperature-Dependent Wideband Fluorescence of a Phosphor Composite for Sensing Applications

High Pressure Study of Localized States Related to Lanthanide Ions in Solids

Principles of Energetic Structure and Excitation-Energy Transfer Based on High-Pressure Measurements

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