Structural investigation of Eu{sup 2+} emissions from alkaline earth zirconium phosphate

Journal Article · Wed Apr 15 04:00:00 EDT 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2008.12.015· OSTI ID:21370332

Hirayama, Masaaki ^[1]; Sonoyama, Noriyuki ^[2]; Yamada, Atsuo ^[1]; Kanno, Ryoji ^[1]

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1. Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatuta, Midori-ku, Yokohama 226-8502 (Japan)
2. Graduate School of Engineering, Environmental Technology and Urban Planning, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555 (Japan)

Eu{sup 2+} doped A{sub 0.5}Zr{sub 2}(PO{sub 4}){sub 3} (A=Ca, Sr, Ba) phosphors with the NASICON structure were synthesized by a co-precipitation method. Their photoluminescent and structural properties were investigated by photoluminescent spectroscopy and powder X-ray Rietveld analysis, which determined two sites for Eu{sup 2+} ions in the host structure, 3a and 3b. The Eu-O bond lengths were increased by changing alkaline earth ions from Ca to Ba, causing Eu{sup 2+} emission bands to shift from blue-green to blue. A correlation was observed between the peak wavelength positions and the Eu-O bond length. The photoluminescent properties are discussed in terms of crystal field strength and nephelauxetic effect, and a schematic diagram of Eu{sup 2+} emissions is proposed for the Eu{sup 2+} doped NASICON phosphor. - Graphical abstract: Eu{sup 2+} doped NASICON structured A{sub 0.5}Zr{sub 2}(PO{sub 4}){sub 3} (A=Ca, Sr, Ba) showed the blue and blue-green colored emissions attributed to 4f{sup 6}5d{sup 1}-4f{sup 7} transitions. The photoluminescent properties are discussed in terms of crystal field strength and nephelauxetic effect using powder X-ray Rietveld analysis.

• OSTI ID: 21370332
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 4 Vol. 182; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BOND LENGTHS
CALCIUM COMPOUNDS
CHARGED PARTICLES
COPRECIPITATION
CRYSTAL FIELD
DIMENSIONS
DOPED MATERIALS
EMISSION
EUROPIUM IONS
IONS
LENGTH
LUMINESCENCE
MATERIALS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHOTOLUMINESCENCE
PHOTON EMISSION
PRECIPITATION
SEPARATION PROCESSES
SPECTROSCOPY
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM PHOSPHATES