Photoluminescence properties of Eu:MgAl2O4 powder phosphor
This paper reports the results of MgAl2O4:Eu3+ red emitting phosphor which has been characterized by X-ray diffraction, FESEM, FT-IR and photoluminescence spectra. The ultraviolet excitation at 393 nm has been chosen because it has got maximum excitation intensity. These phosphors show different emi...
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| Published in: | Journal of alloys and compounds Vol. 474; no. 1-2; pp. 565 - 568 |
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| Main Authors: | , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
17-04-2009
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| Online Access: | Get full text |
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| Summary: | This paper reports the results of MgAl2O4:Eu3+ red emitting phosphor which has been characterized by X-ray diffraction, FESEM, FT-IR and photoluminescence spectra. The ultraviolet excitation at 393 nm has been chosen because it has got maximum excitation intensity. These phosphors show different emissions of Eu3+ corresponding to 5D0 - > 7FJ=0,1,2,3,4 transitions which lie in the wavelength range from 550 to 700 nm. One particular transition 5D0 - > 7F2 which is centered at 615 nm has been known as a hypersensitive emission which obeys the selection rule of (DeltaJ = 2) resulting in a strong and intense red emission. The lifetime, luminescence quenching has been discussed and the mechanism involved in the generation of red emission has also been explained. |
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| Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2008.06.140 |