Luminescence and Scintillation in the Niobium Doped Oxyfluoride Rb4Ge5O9F6:Nb

Carone, Darren; Klepov, Vladislav V.; Misture, Scott T.; Schaeperkoetter, Joseph; Jacobsohn, L.G.; Aziziha, Mina; Schorne-Pinto, Juliano; Thomson, Stuart A. J.; Hines, Adrian T.; Besmann, Theodore M.; Loye, Hans-Conrad zur

doi:10.3390/inorganics10060083

Cited by 5 publications

(4 citation statements)

References 28 publications

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“…Based on literature analysis and control experiments on [Cs 6 X ] A Ga 6 Q 12 :Mn 2+ single crystals, these peaks were assigned to MnS 6 (610 nm) and MnS 4 (690 nm) fluorescent centers. However, additional structure characterization is needed to more precisely determine the local Mn coordination environments . In general, it appears that SIC materials are a versatile platform for photophysics modulation due to diverse cation environments and abilities to activate luminesce using a variety of inorganic luminophores (Mn 2+ , Ce 3+ , and Eu 2+ ) as well as their combinations.…”

Section: Discussionmentioning

confidence: 99%

“…However, additional structure characterization is needed to more precisely determine the local Mn coordination environments. 134 In general, it appears that SIC materials are a versatile platform for photophysics modulation due to diverse cation environments and abilities to activate luminesce using a variety of inorganic luminophores (Mn 2+ , Ce 3+ , and Eu 2+ ) as well as their combinations. Finally, [Cs 6 X]NaGa 6 S 12 :Mn 2+ samples demonstrated scintillation properties, and the brightness of this novel scintillator was estimated to be 22% of BGO for a sample with the lowest Mn loading, [Cs 6 Cl]NaGa 6 S 12 :Mn 2+ 0.01 .…”

Section: ■ Conclusionmentioning

confidence: 99%

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Tunable Salt-Inclusion Chalcogenides for Ion Exchange, Photoluminescence, and Scintillation

et al. 2023

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Salt-inclusion chalcogenides (SICs) consisting of covalent and ionic building blocks have emerged as functional materials exhibiting novel topologies that result from the combination of the chalcogenide-based frameworks and the salt inclusions contained within them. Nine compositions of a novel family of SICs [Cs6 X]AGa6 Q 12 (A = Na, K, and Rb; X = F, Cl, and Br; Q = S and Se) were synthesized via halide/polychalcogenide flux crystal growth and structurally characterized. Ex situ powder X-ray diffraction analysis was used to determine the optimal synthesis temperatures at which the titled SIC materials crystallized in the flux. Density functional theory calculations coupled with convex hull construction were performed to predict the stability of [Cs6 X]AGa6 Q 12 compositions as a function of X, A, and Q and to identify their decomposition pathways. A combination of single-crystal X-ray diffraction and energy-dispersive spectroscopy was used to study single-crystal-to-single-crystal (SC-SC) ion-exchange-reaction, a process that also allowed for the synthesis of two additional members of this family, [Cs6F]NaGa6S12 and [Cs6–x Rb x Br]RbGa6S12, which did not form during the direct flux crystal growth. Furthermore, single crystals of [Cs6 X]AGa6 Q 12:Mn2+ were obtained through direct flux crystal growth and SC-SC ion-exchange reactions and studied for their photoluminescent behavior using individual single crystals. The emission profile changed as a function of Mn2+-content, the A cation identity, and the synthesis method used. Finally, radioluminescence measurements were carried out on [Cs6Cl]NaGa6S12:Mn2+ bulk samples, resulting in bright orange scintillation.

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Section: Discussionmentioning

confidence: 99%

Section: ■ Conclusionmentioning

confidence: 99%

Tunable Salt-Inclusion Chalcogenides for Ion Exchange, Photoluminescence, and Scintillation

et al. 2023

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“…In this case, Rietveld refinement of the resulting powder or other structural characterization techniques are necessary to understand the transformation occurring during postsynthetic modification. Those methods include extended X-ray absorption fine structure spectroscopy (EXAFS), , which informs about the local structure, and electron diffraction or imaging via transmission electron microscopy, − which offers insights into lattice symmetry as well as interatomic or interlayer distances. In this section, we focus on the various techniques that can be used to create new chalcogenide materials starting from single crystals and producing a final product suitable for SC-XRD.…”

Section: Single-crystal-to-single-crystal Postsynthetic Modification ...mentioning

confidence: 99%

Advances in Chalcogenide Crystal Growth: Flux and Solution Syntheses, and Approaches for Postsynthetic Modifications

Berseneva

Loye

2023

Crystal Growth & Design

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Chalcogenide-containing materials are important for the semiconductor and thermoelectric industries and are up-and-coming materials for superconductors, catalysis, and battery applications. Challenges in the synthesis of those materials emerge from the chalcogen’s volatility and from the tendencies of chalcogenide materials to react with even trace quantities of oxygen. Nonetheless, many techniques have been applied to the growth of chalcogenide single crystals, which are convenient for structure determinations and intrinsic property measurements. In the current perspective, we highlight flux crystal growth, solution syntheses, and a novel approach, single-crystal-to-single-crystal modifications, as convenient routes for the preparation of single-crystal chalcogenide materials and emphasize recent advances in those synthetic techniques that have resulted in novel chalcogenide materials classes and that exhibit important properties.

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“…In our group, we have used both molten salt synthesis − and mild hydrothermal synthesis − for the growth of single crystals of a large variety of fluoride phases. For the hydrothermal route using aqueous HF, we established that mild conditions, 160–200 °C and relatively short reaction times, 24 h, followed by slow cooling to room temperature, often yielded high-quality crystals of ternary and quaternary fluorides whose structures could readily be determined.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on Crystal Structures and Synthetic Techniques of Ternary Hafnium/Zirconium Fluorides

et al. 2023

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Mild hydrothermal synthesis was employed to grow high-quality single crystals of ternary fluoridohafnates at low temperatures. The series of new materials was characterized using single-crystal X-ray diffraction, and the crystal structures of AHfF6 (A = Mg and Sr), A2HfF8 (A = Ba and Pb), Ca5Hf3F22, and Cd2HfF8(H2O)6 are discussed herein. Although some material compositions have similar stoichiometries, all of the compositions adopt different structural motifs. A comparison of the crystal structures and synthesis techniques of ternary fluoridohafnates and ternary fluoridozirconates is also reported, and the impact of the subtle changes of synthesis conditions on overall structures is discussed.

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Luminescence and Scintillation in the Niobium Doped Oxyfluoride Rb4Ge5O9F6:Nb

Cited by 5 publications

References 28 publications

Tunable Salt-Inclusion Chalcogenides for Ion Exchange, Photoluminescence, and Scintillation

Tunable Salt-Inclusion Chalcogenides for Ion Exchange, Photoluminescence, and Scintillation

Advances in Chalcogenide Crystal Growth: Flux and Solution Syntheses, and Approaches for Postsynthetic Modifications

Comparative Study on Crystal Structures and Synthetic Techniques of Ternary Hafnium/Zirconium Fluorides

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