Issue 48, 2020

Synthesis, structure, and luminescence properties of layered oxychloride Ba3Y2O5Cl2

Abstract

We report the synthesis, crystal structure, and optical properties of a new layered perovskite oxychloride, Ba3Y2O5Cl2. The structural and electronic properties of the compound were studied and compared with those of related compounds, Ba3RE2O5Cl2 (RE = Sc, Gd, and Lu). Furthermore, the luminescence properties due to Eu-doping were investigated. Polycrystalline Ba3Y2O5Cl2 samples were successfully synthesized by a solid-state reaction. The space group of the compound was I4/mmm and the lattice constants were a = 4.3971(8) Å and c = 24.848(5) Å. The Y atom in this compound shifted toward the apical oxygen site owing to the asymmetric coordination of O and Cl. Moreover, large anisotropic displacements were observed at the O sites. The direct bandgap of the compound was 5.4 eV. As Y3+ ions with a distorted octahedron have an asymmetric coordination environment, both magnetic and electric dipole transitions were observed by doping Eu3+ to Y3+ sites. Ba3Y2O5Cl2:Eu 4% also showed a high internal quantum yield (IQY) (>70%). Therefore, considering the photoluminescence spectra and high IQY, this compound is a potential host lattice for optical materials.

Graphical abstract: Synthesis, structure, and luminescence properties of layered oxychloride Ba3Y2O5Cl2

Supplementary files

Article information

Article type
Paper
Submitted
15 sept. 2020
Accepted
05 nov. 2020
First published
09 nov. 2020

J. Mater. Chem. C, 2020,8, 17162-17168

Synthesis, structure, and luminescence properties of layered oxychloride Ba3Y2O5Cl2

Y. Iwasa, Y. Su, Y. Tsuchiya, M. Tatsuda, K. Kishio, T. Yanagida, F. Takada, T. Nishio, Y. Tsujimoto, K. Fujii, M. Yashima and H. Ogino, J. Mater. Chem. C, 2020, 8, 17162 DOI: 10.1039/D0TC04415F

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