Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.1016/j.jmst.2020.10.026

Ключевые слова: band structure, crystal structure, photoluminescence, raman, sulfate, thermal expansion

Аннотация: A double holmium-silver sulfate was obtained for the first time. The temperature intervals for the formation and stability of the compound were determined by differential scanning calorimetry. The crystal structure of AgHo(SO4)2 was determined by Rietveld method. The X-ray diffraction (XRD) analysis showed that the compound crystalПоказать полностьюlizes in the monoclinic syngony, space group P21/m, with the unit cell parameters a = 4.71751 (4) Å, b = 6.84940 (6) Å and c = 9.89528 (9) Å, β = 95.1466 (4)°, V = 318.448 (5) Å3, Z = 2, RB = 1.55 %, T = 303 K. Two types of sulfate tetrahedra were found in the structure, which significantly affected the spectral properties in the infrared range. In the temperature range of 143−703 K, a negative thermal expansion along the b direction accompanied by a positive thermal expansion along the a and c directions was observed. It was established that negative thermal expansion is the result of the deformation of sulfate tetrahedra, which is affected by the movement of holmium and silver atoms. The excitation in the blue spectral range (457.9 nm) produces a luminescence in light blue (489 nm), green (545 nm) and red (654 nm) spectral ranges, and the latter two were of comparable intensity that is favorable for WLED sources. The observed luminescent band distribution is ascribed to the specific crystal field at Ho3+ ion sites rather than a variation of radiationless probability. © 2020

Журнал: Journal of Materials Science and Technology

Выпуск журнала: Vol. 76

Номера страниц: 111-121

ISSN журнала: 10050302

Издатель: Chinese Society of Metals

• Denisenko Y.G. (Institute of Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation, Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University of Giessen, Giessen, 35392, Germany, Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation)
• Atuchin V.V. (Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russian Federation, Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk, 630090, Russian Federation, Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation)
• Molokeev M.S. (Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation, Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation)
• Wang N. (Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China)
• Jiang X. (Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China)
• Aleksandrovsky A.S. (Laboratory of Coherent Optics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation, Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
• Krylov A.S. (Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation)
• Oreshonkov A.S. (Siberian Federal University, Krasnoyarsk, 660041, Russian Federation, Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation)
• Sedykh A.E. (Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University of Giessen, Giessen, 35392, Germany, Center for Materials Research (LaMa), Justus-Liebig-University Giessen, Giessen, 35392, Germany)
• Volkova S.S. (Institute of Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation)
• Lin Z. (Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China, University of the Chinese Academy of Sciences, Beijing, 100049, China)
• Andreev O.V. (Institute of Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation, Laboratory of the Chemistry of Rare Earth Compounds, Institute of Solid State Chemistry, UB RAS, Ekaterinburg, 620137, Russian Federation)
• Müller-Buschbaum K. (Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University of Giessen, Giessen, 35392, Germany, Center for Materials Research (LaMa), Justus-Liebig-University Giessen, Giessen, 35392, Germany)

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