Temperature and time-dependent luminescence of single crystals of KTb3F10

Pues, Patrick; Baur, Florian; Schwung, Sebastian; Rytz, Daniel; Pöttgen, Rainer; Paulsen, Christian; Janka, Oliver; Rendenbach, Bettina; Johrendt, Dirk; Jüstel, Thomas

doi:10.1016/j.jlumin.2020.117523

Cited by 6 publications

(5 citation statements)

References 29 publications

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“…In the case of stoichiometric Tb 3+ containing fluoride crystals, the observed fluorescence decay times are typically shorter and found to be in the range between 2 and 3 ms. Among these stoichiometric materials KTb 3 F 10 (KTF) stands somewhat out with its long fluorescence lifetime [49], which we confirmed to be about 4.3 ms, which is still comparable to the lifetime of the isostructural low doped Tb 3+ :KY 3 F 10 of 4.9 ms (see Table 1). This cubic crystal is highly interesting for the application in optical isolators [50][51][52].…”

Section: Fluorescence Lifetime Quenching Of the Upper Laser Level 5 Dsupporting

confidence: 65%

Spectroscopic properties of Tb3+ as an ion for visible lasers

et al. 2022

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In recent years, Tb3+-based solid-state lasers with emission in the green and yellow have seen a revival. This was owed to the availability of blue emitting semiconductor-based pump sources and recent findings, which reported more than 60% slope efficiency in the green and about 25% slope efficiency in the yellow. In this paper we review the state of the art of Tb3+-based solid-state lasers. We summarize the spectroscopic properties and present new insights, which enable us to provide valuable guidelines and recommendations for the choice of host materials to further improve the performance of Tb3+-based solid-state lasers.

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Section: Fluorescence Lifetime Quenching Of the Upper Laser Level 5 Dsupporting

confidence: 65%

Spectroscopic properties of Tb3+ as an ion for visible lasers

et al. 2022

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“…[51]. Our crystal structure solution results confirm previous structural studies of KTb 3 F 10 [20,52] and KY 3 F 10 [27,28,53]. The asymmetric unit of KR 3 F 10 contains one rareearth cation R 3+ (24e: 0.24, 0, 0), one anion K + (8c: 1 4 , 1 4 , 1 4 ), and two distinct sites of fluorine ions: F(1) (48i: 1/2, 0.1667, 0.1667) and F(2) (32f: 0.112, 0.112, 0.112).…”

Section: Crystal Structure Refinementsupporting

confidence: 89%

“…This is typical for crystals containing Tb 3+ ions. The electro-dipole transitions within the 4f 8 configuration of this ion are clearly observed without additional impurity lines [18,20,21]. KTb 3 F 10 crystals demonstrate a transparency window in the range of 0.4-1.5 µm, with the exception of a narrow absorption line near λ =~485 nm (7F 6 -5D 4 transition of Tb 3+ ion).…”

Section: Optical Properties Of Kr3f10 Crystalsmentioning

confidence: 94%

“…Rare-earth cations R 3+ are bonded to eight fluorine ions forming square antiprisms. The crystal structure of KR 3 F 10 can be described by considering two types of fundamental building blockspolyanionic clusters of six RF 8 square antiprisms connected either along edges-[R 6 F 32 ] cluster or along vertices-[R 6 F 36 ] ones [20,27,28,[52][53][54][55].…”

Section: Crystal Structure Refinementmentioning

confidence: 99%

“…In contrast to Tb-based fluoride crystals such as TbF 3 and LiTbF 4 , this material is optically isotropic and has serious advantages over the traditionally used magneto-optical terbium-gallium garnet crystals due to their excellent thermo-optical performance. In addition, KTb 3 F 10 crystals are of interest as a high power converter phosphor for LEDs and a potential candidate for X-ray slow scintillating applications [20].…”

Section: Introductionmentioning

confidence: 99%

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Growth Peculiarities and Properties of KR3F10 (R = Y, Tb) Single Crystals

et al. 2021

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Cubic KR3F10 (R = Y, Tb) single crystals have been successfully grown using the Bridgman technique. Growth of crystals of this type is complicated due to the hygroscopicity of potassium fluoride and melt overheating. The solution to the problem of oxygen-incorporated impurities has been demonstrated through the utilization of potassium hydrofluoride as a precursor. In this study, the crystal quality, structure features, and optical, thermal and electrophysical properties of KR3F10 were examined. Data on the temperature dependences of conductivity properties of KTb3F10 crystals were obtained for the first time. These crystals indicated thermal conductivity equal to 1.54 ± 0.05 Wm−1K−1 at room temperature caused by strong phonon scattering in the Tb-based crystal lattice. Ionic conductivities of KY3F10 and KTb3F10 single crystals were 4.9 × 10−8 and 1.2 × 10−10 S/cm at 500 K, respectively, and the observed difference was determined by the activation enthalpy of F− ion migration. Comparison of the physical properties of the grown KR3F10 crystals with the closest crystalline analog from the family of Na0.5−xR0.5+xF2+2x (R = Tb, Y) cubic solid solutions is reported.

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