Title: Microstructural characterization and optical properties of green emitting hexagonal and monoclinic CePO<sub>4</sub>:Tb<sup>3+</sup>nanocrystals
Abstract: Green emitting CePO4:Tb3+ nanocrystals with hexagonal and monoclinic structures were successfully synthesized through microwave assisted sol gel method. The variation observed in the powder XRD pattern from that of bulk is explained using HRTEM analysis in relation with the preferential growth in distinct directions to form nanorods. The results obtained from the microstructural characterization of the hexagonal and monoclinic CePO4:Tb3+nanocrystals are successfully correlated with the single crystal data of CePO4 for the first time in accordance with the single crystal growth theory. FTIR spectrum of the CePO4 nanocrystals evidenced the splitting of fundamental vibrations of phosphate group in the nine fold coordination of lanthanide atoms and confirmed the low symmetry of monoclinic structure than the hexagonal system. The diminishing intensity of terbium emission in the hexagonal structure than the monoclinic structured CePO4:Tb3+ nanocrystals is explained in relation with the lattice symmetry. The high intensity green emission due to the strong 5D4–7F5 transition in monoclinic CePO4:Tb3+ nanocrystals make it as a potential candidate for optoelectronic applications.
Publication Year: 2017
Publication Date: 2017-02-13
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 22
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