Synthesis, structure, and luminescence properties of layered oxychloride Ba3Y2O5Cl2. Issue 48 (24th November 2020)

• Record Type: Journal Article
• Authors: Iwasa, Yuki; Su, Yu; Tsuchiya, Yoshinori; Tatsuda, Makoto; Kishio, Kohji; Yanagida, Takayuki; Takada, Fumi; Nishio, Taichiro; Tsujimoto, Yoshihiro; Fujii, Kotaro; Yashima, Masatomo; Ogino, Hiraku
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 48(2020)
• Page Start: 17162
• Page End: 17168
• Publication Date: 2020-11-24
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0tc04415f
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : We report the synthesis, crystal structure, and optical properties of a new layered perovskite oxychloride, Ba3 Y2 O5 Cl2 . Abstract : We report the synthesis, crystal structure, and optical properties of a new layered perovskite oxychloride, Ba3 Y2 O5 Cl2 . The structural and electronic properties of the compound were studied and compared with those of related compounds, Ba3 RE2 O5 Cl2 (RE = Sc, Gd, and Lu). Furthermore, the luminescence properties due to Eu-doping were investigated. Polycrystalline Ba3 Y2 O5 Cl2 samples were successfully synthesized by a solid-state reaction. The space group of the compound was I 4/ 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 Y 3+ ions with a distorted octahedron have an asymmetric coordination environment, both magnetic and electric dipole transitions were observed by doping Eu 3+ to Y 3+ sites. Ba3 Y2 O5 Cl2 :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.