Enhanced blue emission and EPR study of LaMgAl(11)O(19) Eu phosphors
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Enhanced blue emission and EPR study of LaMgAl(11)O(19) Eu phosphors
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| Creator |
Singh, Vijay
Chakradhar, R P S Rao, J L Kwak, Ho-Young |
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| Subject |
Physical Properties
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| Description |
Europium doped LaMgAl(11)O(19) phosphor was prepared by the combustion met hod The as-prepared and post-treated (1350 degrees C 10 h 5% H(2)+95% N(2)) phosphors wen investigated by X-ray diffraction (XRD) Fourier transform infrared (FT-IR) scanning electron microscopy (SEM) photoluminescence (PL) and electron paramagnetic resonance (EPR) techniques XRD patterns show that LaMgAl(11)O(19) Eu phosphors have hexagonal structure FT-IR spectrum exhibits absorption bands corresponding to the stretching vibration of AlO(4) and AlO(6) Morphological studies reveal that this phosphor has faceted plates of varying sizes and shapes The as-prepared LaMgAl(11)O(19) Eu phosphor consists of both Eu(3+) and Eu(2+) ions The phosphor exhibits a bright blue emission at 450 nm (4f(6)5d -> 4f(7) transition of Eu(2+)) On post-treating the phosphor we are able to enhance the blue emission efficiency by 330% The process was detected from the evolution of excitation emission and EPR spectra and the results are discussed (C) 2010 Elsevier B V All rights reserved
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| Publisher |
Elsevier
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| Date |
2011-02
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/410/1/J_Luminescence_131(2011)247%E2%80%93252.pdf
Singh, Vijay and Chakradhar, R P S and Rao, J L and Kwak, Ho-Young (2011) Enhanced blue emission and EPR study of LaMgAl(11)O(19) Eu phosphors. Journal of Luminescence, 131 (2). pp. 247-252. ISSN 0022-2313 |
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http://cgcri.csircentral.net/410/
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