EPR and luminescence properties of combustion synthesized LiAl5O8 : Mn phosphors
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
EPR and luminescence properties of combustion synthesized LiAl5O8 : Mn phosphors
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| Creator |
Singh, Vijay
Chakradhar, R P S Rao, J L Kim, Dong-Kuk |
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| Subject |
Physical Properties
Glass |
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| Description |
LiAl5O8:Mn2+ phosphors have been synthesized by combustion process in a short time (< 5 min). X-ray diffractogram confirms that the synthesized material consists of LiAl5O8 as main phase. Scanning electron microscopy showed angular plate-like crystals with non-uniform shape. The EPR spectra of Mn2+ ions exhibit resonance signals at g approximate to 4.28 and g approximate to 2.0. The signal at g approximate to 2.0 is due to Mn2+ ions in an environment close to tetrahedral symmetry, whereas the resonance at g approximate to 4.28 is attributed to the rhombic surroundings of the Mn2+ ions. The variation of zero-field splitting parameter (D) with temperature is measured and discussed. The PL spectra exhibit green emission peaks at 505 and 518 nm which are due to the T-4(1) (G)->(6)A(1) (S) transition of Mn2+ ions. The EPR study of LiAl5O8:Mn2+ phosphor gives clear indication of the Mn2+ ions occupying more than one site in this phosphor. (c) 2008 Elsevier B.V. All rights reserved.
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| Publisher |
Elsevier
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| Date |
2008-07-15
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/473/1/Mater_Chem_Phys_110_(2008)_43%E2%80%9351.pdf
Singh, Vijay and Chakradhar, R P S and Rao, J L and Kim, Dong-Kuk (2008) EPR and luminescence properties of combustion synthesized LiAl5O8 : Mn phosphors. Materials Chemistry and Physics, 110 (1). pp. 43-51. ISSN 0254-0584 |
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| Relation |
http://cgcri.csircentral.net/473/
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