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Excitation Induced Tunable Emission in Ce3+/Eu3+Codoped BiPO4Nanophosphors

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Title: Excitation Induced Tunable Emission in Ce3+/Eu3+Codoped BiPO4Nanophosphors
Authors: Singh, Sarabjot Browse this author
Lakshminarayana, G. Browse this author
Sharma, Manoj Browse this author
Dao, Thang Duy Browse this author
Chen, K. Browse this author
Wada, Yoshiki Browse this author
Takeda, T. Browse this author
Nagao, T. Browse this author →KAKEN DB
Issue Date: 2015
Journal Title: Journal of Spectroscopy
Volume: 2015
Start Page: 1
End Page: 10
Publisher DOI: 10.1155/2015/493607
Abstract: Ce3+, Eu3+ ions singly doped, and Ce3+/Eu3+ codoped bismuth phosphate (BiPO4) nanophosphors were synthesized by a simple precipitation method and their structural, morphological, and photoluminescence properties were investigated. The structural and morphological analysis confirms the pure hexagonal crystal structure of the synthesized nanophosphors. From the Fourier transform infrared (FTIR) spectra various absorption bands respective to functional groups such as PO4 and phonon vibrations including the bending modes of the PO4 units are identified. The Ce3+ doped nanophosphors show spectrally broad luminescence in the blue (centred at 459 nm) wavelength region under the direct optical excitation of Ce3+ at 417 nm. For Eu3+ doped nanophosphors, five emission bands have been observed with 394 nm excitation wavelength. Among them, 595 nm has shown bright yellowish-orange emission. These results demonstrate that by appropriately tuning the excitation wavelength of these codoped nanophosphors the emission color in the visible region (blue and orange) can be flexibly controlled in a single sample without varying its chemical composition and size. The mechanism for this excitation energy dependent tunable emission is explained on the basis of nonenergy transfer (ET) occurring among Ce3+/Eu3+ dopant ions.
Rights: https://creativecommons.org/licenses/by/3.0/
Type: article
URI: http://hdl.handle.net/2115/72261
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 長尾 忠昭

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