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Type: Journal article
Title: Mechanochemical preparation of nanocrystalline metal halide phosphors
Author: Zhang, J.
Riesen, N.
Kasim, L.
Badek, K.
Riesen, H.
Citation: Journal of Materials Science, 2018; 53(19):13643-13659
Publisher: Springer
Issue Date: 2018
ISSN: 0022-2461
Statement of
Jun Zhang, Nicolas Riesen, Lubina Thattamveedu Kasim, Kate Badek, and Hans Riesen
Abstract: In recent years, mechanochemistry has experienced a massive resurgence allowing for solvent-free preparation of many important materials with minimal energy requirements. This paper provides a review of the mechanochemical preparation of nanocrystalline metal halides for applications as inorganic phosphor materials. The review puts strong emphasis on our recent work on optical and X-ray storage phosphors such as the matlockite BaFCl:Sm³⁺. In addition, previously unpublished results are presented including the effect on the samarium oxidation state when using ball-milling, as well as results on other rare earth-doped matlockites. We outline how mechanochemical methods can be applied to synthesise, without the need for solvents and high temperatures, a wide range of halides ranging from the most important commercial X-ray storage phosphor BaFBr:Eu²⁺ to lead perovskites of the formula APbX₃ with A = Cs⁺, CH₃NH₃⁺, etc., and X = F, Cl, Br, I or a mixture thereof. We also demonstrate that a wide variety of solid solutions of the general formula M¹ₓM²₁_ₓFX¹yX²₁−y (with M¹ and M² = Ba, Sr, Ca; X¹, X² = Cl, Br, I) that can be suitable hosts for luminescent activator ions, can be prepared by mechanochemical methods. Importantly, for prolonged grinding times with a high-energy ball-mill, crystallites on the nanoscale can be obtained as can be confirmed by Rietveld refinements of powder XRD patterns and electron microscopy.
Rights: © Springer Science+Business Media, LLC, part of Springer Nature 2018
DOI: 10.1007/s10853-018-2559-y
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