Cooperative Energy Transfer from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Yb</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Tb</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mro

Ostermayer, F. W.; Uitert, L. G. Van

doi:10.1103/physrevb.1.4208

Cited by 97 publications

(36 citation statements)

References 8 publications

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“…Here Yb 3 þ ions can act as an efficient sensitizer for Tb 3 þ ions because its 980 nm absorption cross section is strong enough and matching well with the standard wavelength of commercially available high-power InGaAs laser diodes. The cooperative sensitization between Yb 3 þ and Tb 3 þ were first independently investigated by Livanova,Saitkulov,, and by Ostermayer and Van Uitert [10], and theoretically proposed by Miyakawa and Dexter [11]. By multi-phonon upconversion processes, the Yb 3 þ /Tb 3 þ couple is expected to emit intense ultraviolet upconversion luminescence.…”

Section: Introductionmentioning

confidence: 97%

Intense ultraviolet upconversion luminescence of Yb3+ and Tb3+ co-doped glass ceramics containing SrF2 nanocrystals

Qiao

Fan

Xue

et al. 2011

Journal of Luminescence

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Section: Introductionmentioning

confidence: 97%

Intense ultraviolet upconversion luminescence of Yb3+ and Tb3+ co-doped glass ceramics containing SrF2 nanocrystals

Qiao

Fan

Xue

et al. 2011

Journal of Luminescence

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“…The first value is indicative of an UC process involving the absorption of two IR photons to populate the Tb 3þ 5 D 4 first excited state, whereas the second suggests a mixture of twoand three-photon absorption processes, with the latter being predominant. 21 In this case the Tb In our crystals, the UC can be comparatively efficient due to the good matching of the energy levels of both ions and to their high concentrations as compound constituents. However, the UC following a DC process presumably has a low efficiency, and therefore the influence of the UC on the lifetime variation may be disregarded in a first approximation.…”

Section: Resultsmentioning

confidence: 92%

Tb3+-Yb3+ cooperative down and up conversion processes in Tb0.81Ca0.19F2.81:Yb3+ single crystals

Molina

Vasyliev

Vı́llora

et al. 2011

Journal of Applied Physics

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The energy transfer processes between Tb 3þ and Yb 3þ ions are studied in Tb-based fluoride single crystals. These are very transparent from the UV to the IR wavelength regions, except for the characteristic absorption lines of the rare-earth ions under study. In contrast with previously reported Tb 3þ -doped glasses and oxide powders, these crystals containing a high Tb 3þ concentration present two major advantages for the study of the energy transfer processes in the Tb 3þ -Yb 3þ ion pair. Firstly, the adverse influence of host defects is minimized with the use of high quality crystals. Secondly, the high Tb 3þ concentration guarantees a much higher absorption cross-section of UV light, and consequently these crystals have real potential for practical applications. Photoluminescence spectra in the visible-IR wavelength region demonstrate the existence of efficient down and up conversion processes by crossed excitation and emission characteristics of Tb 3þ and Yb 3þ ions. In the down conversion process, Tb 3þ (, two IR photons are emitted for each Tb 3þ ion deexcited by second-order energy transfer to two Yb 3þ ions. The total quantum efficiency of the down conversion process in the fluoride system is shown to increase linearly with the Yb 3þ concentration, reaching its maximum at the Yb 3þ solubility limit in the fluoride host. Further, efficient up conversion by two-and three-IR photon absorption is observed.

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“…Ostermayer and van Uitert [18] (1970) also described the cooperative sensitization of ytterbium cations and the energy transfer to a third acceptor in co-doped Yb, Tb-YF 3 . (ii) The second mechanism is based on the [ 2 F 5/2 -2 F 5/2 ] pair whose energy is equal to about 22,000 cm À1 .…”

Section: Yb 3+ -Eu 3+ Energy Transfermentioning

confidence: 96%

Yb3+ and Yb3+–Eu3+ luminescent properties of the Li2Lu5O4(BO3)3 phase

Jubera¹,

Garcia²,

Chaminade³

et al. 2007

Journal of Luminescence

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The luminescence of Yb 3+ in the oxyborate Li 2 Lu 5 O 4 (BO 3 ) 3 is reported. At low temperature, in addition to the usual ytterbium infrared emission, this phosphor presents an emission in the ultraviolet (l max ¼ 345 nm) which corresponds to the transition from the charge transfer state (O-Yb) to the 4f levels of Yb 3+ . The temperature quenching Tq50% is equal to 120 K. The infrared emission studied at room temperature is located between 950 and 1100 nm.Europium emission quenching in the Li 2 Yb 5 O 4 (BO 3 ) 3 phase is related to Eu-Yb transfer by cross-relaxation. The reverse Yb-Eu transfer by cooperative sensitization is highlighted in the codoped Li 2 Lu 5 O 4 (BO 3 ) 3 compound. r

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Cooperative Energy Transfer fromYb3+toTb3+

Cited by 97 publications

References 8 publications

Intense ultraviolet upconversion luminescence of Yb3+ and Tb3+ co-doped glass ceramics containing SrF2 nanocrystals

Intense ultraviolet upconversion luminescence of Yb3+ and Tb3+ co-doped glass ceramics containing SrF2 nanocrystals

Tb3+-Yb3+ cooperative down and up conversion processes in Tb0.81Ca0.19F2.81:Yb3+ single crystals

Yb3+ and Yb3+–Eu3+ luminescent properties of the Li2Lu5O4(BO3)3 phase

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