Rahidul Hasan, Hafiz Zohaib Aslam, Nethmi W. Hewage, Ernesto Soto, Roger A. Lalancette and Georgiy Akopov*,
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We confirmed the phase purity and crystal structure through powder XRD and single-crystal XRD analyses. The Ce- and Eu-doped compositions exhibit broad-spectrum transitions from UV to visible regions. Photoluminescence spectroscopy analysis reveals distinct emission bands for Ce-doped <i>La</i><sub>3</sub>(SiS<sub>4</sub>)<sub>2</sub>I at 430 and 490 nm within the bluish region (0.15, 0.22 coordinates on the 1931 CIE chromaticity diagram) upon excitation at 375 nm. Conversely, Eu-doped La<sub>3</sub>(SiS<sub>4</sub>)<sub>2</sub>I demonstrates an emission band at 578 nm in the yellow-orange (0.45, 0.51) region following excitation at 450 nm. Analysis of time-resolved spectra indicates multiple emissive bands contributing to the photoluminescence spectra. The average half-life of emission bands suggests fluorescence for (La<sub>1–<i>x</i></sub>Ce<sub><i>x</i></sub>)<sub>3</sub>(SiS<sub>4</sub>)<sub>2</sub>I and phosphorescence for (La<sub>1–<i>x</i></sub>Eu<sub><i>x</i></sub>)<sub>3</sub>(SiS<sub>4</sub>)<sub>2</sub>I phosphors.</p>","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":"63 50","pages":"23514–23523 23514–23523"},"PeriodicalIF":4.7000,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhancement of Crystal Growth in Molten Salts by a Cocrystallization Agent: Synthesis and Luminescent Properties of Ce3+- and Eu2+-Doped La3(SiS4)2I\",\"authors\":\"Rahidul Hasan, Hafiz Zohaib Aslam, Nethmi W. Hewage, Ernesto Soto, Roger A. Lalancette and Georgiy Akopov*, \",\"doi\":\"10.1021/acs.inorgchem.4c0179510.1021/acs.inorgchem.4c01795\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >In this study, we present the growth of large <i>Ln</i><sub>3</sub>(SiS<sub>4</sub>)<sub>2</sub>I (<i>Ln</i> = La, Ce) crystals, both undoped and doped with Ce and Eu. The synthesis process involves the utilization of an arc-melted precursor in conjunction with sulfur and KI. We investigate the role of Zr, Nb, Mo, and Ir as cocrystallization agents, facilitating the growth of relatively large (up to 6–7 mm) crystals. Our study suggests that Mo effectively acts as a cocrystallization agent for the synthesis of the Ln<sub>3</sub>(SiS<sub>4</sub>)<sub>2</sub>I and Ce- and Eu-doped La<sub>3</sub>(SiS<sub>4</sub>)<sub>2</sub>I phosphors. We confirmed the phase purity and crystal structure through powder XRD and single-crystal XRD analyses. The Ce- and Eu-doped compositions exhibit broad-spectrum transitions from UV to visible regions. Photoluminescence spectroscopy analysis reveals distinct emission bands for Ce-doped <i>La</i><sub>3</sub>(SiS<sub>4</sub>)<sub>2</sub>I at 430 and 490 nm within the bluish region (0.15, 0.22 coordinates on the 1931 CIE chromaticity diagram) upon excitation at 375 nm. Conversely, Eu-doped La<sub>3</sub>(SiS<sub>4</sub>)<sub>2</sub>I demonstrates an emission band at 578 nm in the yellow-orange (0.45, 0.51) region following excitation at 450 nm. Analysis of time-resolved spectra indicates multiple emissive bands contributing to the photoluminescence spectra. 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Enhancement of Crystal Growth in Molten Salts by a Cocrystallization Agent: Synthesis and Luminescent Properties of Ce3+- and Eu2+-Doped La3(SiS4)2I
In this study, we present the growth of large Ln3(SiS4)2I (Ln = La, Ce) crystals, both undoped and doped with Ce and Eu. The synthesis process involves the utilization of an arc-melted precursor in conjunction with sulfur and KI. We investigate the role of Zr, Nb, Mo, and Ir as cocrystallization agents, facilitating the growth of relatively large (up to 6–7 mm) crystals. Our study suggests that Mo effectively acts as a cocrystallization agent for the synthesis of the Ln3(SiS4)2I and Ce- and Eu-doped La3(SiS4)2I phosphors. We confirmed the phase purity and crystal structure through powder XRD and single-crystal XRD analyses. The Ce- and Eu-doped compositions exhibit broad-spectrum transitions from UV to visible regions. Photoluminescence spectroscopy analysis reveals distinct emission bands for Ce-doped La3(SiS4)2I at 430 and 490 nm within the bluish region (0.15, 0.22 coordinates on the 1931 CIE chromaticity diagram) upon excitation at 375 nm. Conversely, Eu-doped La3(SiS4)2I demonstrates an emission band at 578 nm in the yellow-orange (0.45, 0.51) region following excitation at 450 nm. Analysis of time-resolved spectra indicates multiple emissive bands contributing to the photoluminescence spectra. The average half-life of emission bands suggests fluorescence for (La1–xCex)3(SiS4)2I and phosphorescence for (La1–xEux)3(SiS4)2I phosphors.
期刊介绍：
Inorganic Chemistry publishes fundamental studies in all phases of inorganic chemistry. Coverage includes experimental and theoretical reports on quantitative studies of structure and thermodynamics, kinetics, mechanisms of inorganic reactions, bioinorganic chemistry, and relevant aspects of organometallic chemistry, solid-state phenomena, and chemical bonding theory. Emphasis is placed on the synthesis, structure, thermodynamics, reactivity, spectroscopy, and bonding properties of significant new and known compounds.
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