The vibronic spectroscopy of Pr3+ in YOCl and LaOCl

Donegá, Celso de Mello; Lambaerts, H.; Meijerink, Andries; Blasse, G.

doi:10.1016/0022-3697(93)90212-a

Cited by 24 publications

(10 citation statements)

References 23 publications

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“…The spectrum of the Lu 2 O 3 :10% Eu powder dispersed in undoped lutetia is practically identical with the spectrum of the 1% specimen already seen in figure 6. A similar situation was described by de Mello Donega et al [32,33], who investigated the concentration dependence of the vibronic transitions probabilities in rare earths. The explanation is then that this is a saturation effect.…”

Section: Resultssupporting

confidence: 58%

Structural and spectroscopic characterization of Lu₂O₃:Eu nanocrystalline spherical particles

Trojan‐Piegza¹,

Zych²,

Hreniak³

et al. 2004

J. Phys.: Condens. Matter

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Spherical particles of Lu 2 O 3 :x% Eu, with x varying from 0% to 10% with respect to Lu, were prepared by precipitating hydroxides with urea at 80 • C and subsequently decomposing these hydroxides to oxides at 650 • C. TEM pictures revealed that the spherical particles were very uniform in size and their diameters were about 130 nm. Each of the particles consisted of crystallites about 20 nm in diameter. Luminescence and excitation spectra contained all the characteristic features of the Eu 3+ ion. The most intense line in the emission was located around 611 nm. Energy transfer was observed from the Eu 3+ ions occupying the S 6 (C 3i ) centrosymmetric site to the Eu 3+ located in the non-centrosymmetric position of C 2 symmetry. The decay kinetics were slightly non-exponential, especially for the lowest dopant concentrations. At liquid nitrogen temperature the average decay time for the 0.2% powder was shorter by about 40% compared to the 3-10% materials. At room temperature the average decay time varies only slightly. Rise times were observed for all concentrations at room temperature but only for higher concentrations at liquid nitrogen temperature. This effect is in contrast to that of nanoparticles of Lu 2 O 3 :Eu prepared using different synthesis procedures.

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Section: Resultssupporting

confidence: 58%

Structural and spectroscopic characterization of Lu₂O₃:Eu nanocrystalline spherical particles

Trojan‐Piegza¹,

Zych²,

Hreniak³

et al. 2004

J. Phys.: Condens. Matter

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“…Within the C 4v point symmetry, three transitions from the occupied 1 D 2 (B 2 ) level are electric dipole allowed and were assigned as shown in figure 2. This assignment is consistent with former results on Pr 3+ :LnOCl (Ln = La, Pr, Gd) [5][6][7].…”

Section: High-pressure Resultssupporting

confidence: 93%

“…According to the ambient-pressure spectrum, one may assign lines a and b simply to vibronic lines of the 1 D 2 (B 2 ) → 3 H 4 (E) transition. These lines were studied in detail for Pr 3+ :LaOCl [7]. However, according to the spectra presented in reference [7], vibronic lines can be expected not only in a small region around 220 cm −1 below the zero-phonon line, but also in a rather broad spectral range.…”

Section: High-pressure Resultsmentioning

confidence: 98%

“…These lines were studied in detail for Pr 3+ :LaOCl [7]. However, according to the spectra presented in reference [7], vibronic lines can be expected not only in a small region around 220 cm −1 below the zero-phonon line, but also in a rather broad spectral range. In addition, there is no reasonable explanation for why these two lines in particular should show a distinct increase in intensity, while no other bands can even be observed under pressure.…”

Section: High-pressure Resultsmentioning

confidence: 98%

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Energy levels of Pr³⁺:GdOCl under pressure

Bungenstock¹,

Tröster²,

Holzapfel³

et al. 2000

J. Phys.: Condens. Matter

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Excitation and luminescence spectra of Pr 3+ in GdOCl were measured in the spectral range from 11 000 cm −1 to 22 500 cm −1 . At ambient pressure a total of 54 spectral lines were observed. Some of these lines cannot be explained by transitions between crystal-field levels of the regular Pr 3+ site in GdOCl. Possible explanations of these lines are discussed. Under pressure up to 16 GPa, all lines exhibit a red-shift, from which a part of the energy level scheme of the 4f 2 configuration could be derived. From the 34 levels at ambient pressure, 31 could also be obtained under pressure. The energy level scheme is described in terms of the free-ion parameters (F k , α, β, γ , ζ , M k , P k ) and crystal-field parameters (B 2 0 , B 4 0 , B 4 4 , B 6 0 , B 6 6 ). The variations of these parameters under pressure were determined. Surprisingly, the crystal-field strength, calculated from the crystal-field parameters, first shows a slight decrease with increasing pressure.

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“…Also RT photoluminescence upon excitation into the fd band of either of the activator does not contain components related to transitions from any higher energy levels of the activators. For the case of Pr the lack of luminescence from its 3 P0 level was researched both experimentally [101] and theoretically [102] as such a luminescence would be very desirable for scintillation purposes [103]. Let us yet note that, in principle, the electron-hole recombination might take place at a holetrapping center adjacent to Pr/Tb and only afterwards the energy would be transferred to the activator which would then produce luminescent photons.…”

Section: Resultsmentioning

confidence: 99%

Lu2O3-based storage phosphors. An (in)harmonious family

Kulesza

Bolek

Bos

et al. 2016

Coordination Chemistry Reviews

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The vibronic spectroscopy of Pr3+ in YOCl and LaOCl

Cited by 24 publications

References 23 publications

Structural and spectroscopic characterization of Lu₂O₃:Eu nanocrystalline spherical particles

Structural and spectroscopic characterization of Lu₂O₃:Eu nanocrystalline spherical particles

Energy levels of Pr³⁺:GdOCl under pressure

Lu2O3-based storage phosphors. An (in)harmonious family

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The vibronic spectroscopy of Pr3+ in YOCl and LaOCl

Cited by 24 publications

References 23 publications

Structural and spectroscopic characterization of Lu2O3:Eu nanocrystalline spherical particles

Structural and spectroscopic characterization of Lu2O3:Eu nanocrystalline spherical particles

Energy levels of Pr3+:GdOCl under pressure

Lu2O3-based storage phosphors. An (in)harmonious family

Contact Info

Product

Resources

About

Structural and spectroscopic characterization of Lu₂O₃:Eu nanocrystalline spherical particles

Structural and spectroscopic characterization of Lu₂O₃:Eu nanocrystalline spherical particles

Energy levels of Pr³⁺:GdOCl under pressure