Energy transfer from Gd3+ to Tb3+ and Eu3+

Blasse, G.; Heuvel, G.P.M. van den; Dijk, Tom van

doi:10.1016/0009-2614(79)80773-3

Cited by 20 publications

(9 citation statements)

References 6 publications

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“…For excitation into the 6p level the same holds, but the last step (to Tb 3+) is now considerably less efficient and cannot compete with the Gd 3+ traps. Similar observations were made in gadolinium-zirconates (20).…”

Section: Discussionsupporting

confidence: 83%

Energy transfer phenomena in Tb3+-activated gadolinium tantalate (GdTaO4)

Lammers

Blasse

1984

Materials Research Bulletin

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The energy transfer phenomena in GdTaO 4 activated with Tb 3+ have been investigated. It is shown that the ratio of the 5D 3 and 5D 4 emission intensities of Tb 3+ depends strongly on the excitation wavelength. The Tb 3+ 5D 3 level is populated by direct excitation into the Tb 3+ 4f 8 levels, by energy transfer from the Gd 3+ 6p level or by energy transfer from the intrinsic tantalate group via the Gd 3+ 6p level. The Tb 3+ 5D 4 level is populated by direct excitation into the 4f75d state, by energy transfer from the Gd 3+ 61 level, or by cross-relaxation from the 5D 3 level. Direct relaxation from 5D 3 to 5D 4 is found to be improbable. The 61 ÷ 6p 3+ relaxation of the excited Gd ion is slow in comparison with the competing energy transfer processes.

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Section: Discussionsupporting

confidence: 83%

Energy transfer phenomena in Tb3+-activated gadolinium tantalate (GdTaO4)

Lammers

Blasse

1984

Materials Research Bulletin

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“…For the energy in the 6P level of Cd3+ the transfer to Eu3+ has to compete with trapping by Cd3+ traps, because the transfer rate to Eu3+ and to Sd3+ traps will be of the same order of magnitude. Similar observations have been made in gadolinium tantalates and zirconates [7,12].…”

Section: Cdbazno5supporting

confidence: 85%

The luminescence of Eu3+, Tb3+ and Tm3+ activated Gd2BaZnO5 and La2BaZnO5

Lammers

Donker

Blasse

1985

Materials Chemistry and Physics

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“…In LGBO, vibrational relaxation between the 6 I j and 6 P j levels is known to be nonradiative [1]. At the same time, migration of electronic excitation energy among 6 I j levels over the Gd 3+ ion chains is more effi cient than that among the 6 P j levels [21]. Assuming the temperature dependence of the luminescence inten sity at 3.97 eV to be dominated primarily by the rate of 6 I j 6 P j vibrational relaxation, we proposed earlier a relation to approximate the temperature dependence of this luminescence in the LGBO crystal excited by X rays from a laboratory source [14,15] (1)…”

Section: Temperature Dependence Of Intrinsic Luminescencementioning

confidence: 99%

Luminescence and electronic excitations in Li6Gd(BO3)3: Ce3+ crystals

et al. 2012

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This paper reports on a study of the luminescence emitted by Li 6 Gd(BO 3 ) 3 : Ce 3+ crystals under selective photoexcitation to lower excited states of the host ion Gd 3+ and impurity ion Ce 3+ within the 100-500 K temperature interval, where the mechanisms of migration and relaxation of electronic excitation energy have been shown to undergo noticeable changes. The monotonic 10-15 fold increase in intensity of the luminescence band at 3.97 eV has been explained within a model describing two competing processes, namely, migration of electronic excitation energy over chains of Gd 3+ ions and vibrational energy relaxation between the 6 I j and 6 P j levels. It has been shown that radiative transitions in Ce 3+ ions from the lower excited state 5d 1 to 2 F 5/2 and 2 F 7/2 levels of the ground state produce two photoluminescence bands, at 2.08 and 2.38 eV (Ce1 center) and 2.88 and 3.13 eV (Ce2 center). Possible models of the Ce1 and Ce2 luminescence centers have been discussed.

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Energy transfer from Gd3+ to Tb3+ and Eu3+

Cited by 20 publications

References 6 publications

Energy transfer phenomena in Tb3+-activated gadolinium tantalate (GdTaO4)

Energy transfer phenomena in Tb3+-activated gadolinium tantalate (GdTaO4)

The luminescence of Eu3+, Tb3+ and Tm3+ activated Gd2BaZnO5 and La2BaZnO5

Luminescence and electronic excitations in Li6Gd(BO3)3: Ce3+ crystals

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