Crystal structure analysis and evidence of mixed anion coordination at the Ce3+ site in Y3Al2(Al,Si)3(O,N)12 oxynitride garnet phosphor

被引：20

作者：

Asami, Kazuki ^{[1
]}

Shiraiwa, Masahiro ^{[2
]}

Ueda, Jumpei ^{[1
]}

Fujii, Kotaro ^{[2
]}

Hongo, Kenta ^{[3
]}

Maezono, Ryo ^{[4
]}

Brik, Mikhail G. ^{[5
]}

Yashima, Masatomo ^{[2
]}

Tanabe, Setsuhisa ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Human & Environm Studies, Kyoto 6068501, Japan

[2] Tokyo Inst Technol, Sch Sci, Dept Chem, Tokyo 1528551, Japan

[3] JAIST, Res Ctr Adv Comp Infrastruct, Asahidai 1-1, Nomi, Ishikawa 9231292, Japan

[4] JAIST, Sch Informat Sci, Asahidai 1-1, Nomi, Ishikawa 9231292, Japan

[5] Univ Tartu, Inst Phys, W Ostwald Str 1, EE-50411 Tartu, Estonia

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2019年 / 7卷 / 05期

关键词：

BOND-VALENCE PARAMETERS; THERMAL-STABILITY; LUMINESCENCE; BAND; PHOTOLUMINESCENCE; EMISSION;

D O I：

10.1039/c8tc04980g

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structural and luminescence properties of Ce3+-doped Y3Al4.75Si0.25O11.75N0.25 oxynitride garnet (YASiONG:Ce) phosphor are investigated by neutron powder diffraction (NPD) and spectroscopic measurements, respectively. The obtained NPD patterns confirmed the presence of N atoms in YASiONG:Ce by Rietveld structural refinement for the first time. In addition, we studied the structure and bond lengths of YASiONG and compared the parameters with those of Y3Al5O12 (YAG) using two different models and experimental NPD data. In the photoluminescence (PL) and PL excitation spectra of the YASiONG:Ce phosphor measured at 50 K, additional excitation and emission bands of Ce3+: 4f 5d(1) appeared at longer wavelengths compared with the YAG:Ce phosphor. The additional bands can be attributed to the 4f 5d(1) transition of Ce3+ at the dodecahedral site with one N3- and seven O2- coordination.

引用

页码：1330 / 1336

页数：7

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