Study on structure and photoluminescence properties of hydrated phase halides solid solution Rb2IClxBr(5-x)∙H2O:Sb
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Date
2022-05
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The Ohio State University
Abstract
In this research, the crystal structural information and photoluminescence properties related to changing the ratio of halide X (Cl and Br) in the Rb2InX5•H2O:Sb3+ materials were studied. Samples of Rb2InClxBr(5-x)∙H2O:Sb 5% were prepared at x values ranging from 0 to 5 from hydrothermal reaction conditions in hydrohalic acid. Based on Rietveld refinements, the general crystal structure change did not follow a Vegard's Law transition and the smaller Cl anion was favored in the structure, especially favored at the Wyckoff site 8d in the unit cell. The effect of coordinated water molecules on the preferential substitution of the halides was explored. PL emission maximum also trends with halide substitution with a red shift as Br is introduced. The highest intensity of emission was found for Rb2InCl1Br5•H2O:Sb3+ with an emission maximum around 700 nm with a PLE maximum at 360 nm.
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Keywords
crystal structure, photoluminescence, solid solution, hydrated phase materials