Temperature-dependent luminescence of Ce3+ in gallium-substituted garnets

Hansel, Rachael A.; Allison, S. W.; Walker, D. G.

doi:10.1063/1.3216583

Cited by 38 publications

(13 citation statements)

References 8 publications

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“…The energies of the levels of the outer 5d 1 orbitals in lanthanides being subject to strong influence of the environment [19,20], the Ce 3+ ion may be used as a luminescent probe to study the specific features mediating trans fer of the energy of electronic excitations which account for the buildup of the luminescence inten sity in LGBO.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

confidence: 99%

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

et al. 2012

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“…[4][5][6] Hansel et al explained the quenching in the Ce:YGG by the nonradiative relaxation process from the 5d excited state to the 4f ground state using a configuration coordinate diagram. 6 However, the 5d state of Ce 3þ in the Ce:YGG has higher energy compared with that in the Ce:YAG. The nonradiative relaxation through the cross points between 5d and 4f levels are usually suppressed with increasing 5d energy levels as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Ce3+ luminescence quenching in solid solutions between Y3Al5O12 and Y3Ga5O12 by temperature dependence of photoconductivity measurement

Ueda¹,

Tanabe²,

Nakanishi³

2011

Journal of Applied Physics

204

122

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Photocurrent excitation spectra were measured to investigate the quenching in the garnet solid solutions. Intense photocurrent excitation bands attributed to the lowest 5d 1 and the second lowest 5d 2 levels were observed in the Ce-doped Y 3 Al 2 Ga 3 O 12 (Ce:YAGG) and Y 3 Ga 5 O 12 (Ce:YGG). Based on the results of temperature dependence of photoconductivity, the 5d 1 and 5d 2 levels in the Ce:YAGG are found to be located below and within the conduction band, respectively, while both levels in the Ce:YGG are found to be located within its conduction band located at lower energy levels. In addition, the threshold of photoionization from the 4f level of Ce 3þ to the conduction band in the Ce:YAGG and Ce:YGG were estimated to be 3.2, and 2.8 eV, respectively. We conclude that the main quenching process in the Ce:YAGG is caused by the thermally stimulated ionization process with activation energy of 90 meV from the 5d 1 to the conduction band, and that in the Ce:YGG is caused by the direct ionization process from the 5d levels to the conduction band.

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“…In the UC process, it is known that the UC emission intensity I is depends on the pump power and follow the below Eq. (1) [22]:…”

Section: Resultsmentioning

confidence: 99%

Optical thermometry based on the upconversion luminescence from Er doped Bi7Ti4TaO21 ferroelectric ceramics

Zou

Wang

et al. 2015

J Mater Sci: Mater Electron

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The Er doped Bi 7 Ti 4 TaO 21 ceramics were prepared using conventional solid-state reaction techniques. Under 980 nm excitation, the intensive green emission was investigated and the up-conversion emission was a two-photo energy transfer process. By using fluorescence intensity ratio technique, the collected data was well fitted to the function of temperature in the temperature range of 175-600 K, revealing the good potential for the development of optical thermometry.

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Temperature-dependent luminescence of Ce3+ in gallium-substituted garnets

Cited by 38 publications

References 8 publications

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

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

Analysis of Ce3+ luminescence quenching in solid solutions between Y3Al5O12 and Y3Ga5O12 by temperature dependence of photoconductivity measurement

Optical thermometry based on the upconversion luminescence from Er doped Bi7Ti4TaO21 ferroelectric ceramics

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