Synthesis of Hexagonal Prism (La, Ce, Tb)PO4 Phosphors by Precipitation Method

Hexagonal prism (La, Ce, Tb)PO4 green phosphors have been successfully prepared via a precipitation method route at ambient pressure from aqueous solution. The precipitation was obtained from lanthanide-nitrate complexes and (NH4)2HPO4 with citric acid as a structural modifier. The prism length diam...

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Bibliographic Details
Published in:Crystal growth & design 2012-04, Vol.12 (4), p.1785-1791
Main Authors: Shi, Yurong, Wang, Yuhua, Wang, Dan, Liu, Bitao, Li, Yanhui, Wei, Lan
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Growth from solutions
Materials science
Methods of crystal growth
physics of crystal growth
Physics
Theory and models of crystal growth
physics of crystal growth, crystal morphology and orientation
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Summary:Hexagonal prism (La, Ce, Tb)PO4 green phosphors have been successfully prepared via a precipitation method route at ambient pressure from aqueous solution. The precipitation was obtained from lanthanide-nitrate complexes and (NH4)2HPO4 with citric acid as a structural modifier. The prism length diameter ratio and size can be tailored by varying the content of citric acid and the acidity of the solution, respectively. The mechanism of how the citric acid and acidity affect morphology has also been studied. Scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, and differential thermal analysis-thermogravimetry were used to characterize the morphology of the products and investigate the possible mechanism of formation and growth of the hexagonal prism. Furthermore, photoluminescence (PL) properties of (La, Ce, Tb)PO4 products were also carried out and compared with those of commercial phosphors.
ISSN:1528-7483
1528-7505
DOI:10.1021/cg201225k