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Photoluminescence and electron spin resonance study on narrow-band UVB emitting Gd-doped LaPO4 phosphors.
- Source :
-
Optik - International Journal for Light & Electron Optics . Mar2020, Vol. 206, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- A series of trivalent gadolinium (Gd3+) doped lanthanum phosphates (LaPO 4) were prepared by the co-precipitation technique with varying concentrations of Gd3+. The structural properties of the prepared phosphor samples were analyzed by X-ray diffraction (XRD) which showed monoclinic structure of LaPO 4. The photoluminescence (PL) emission spectra of the Gd3+-doped phosphor excited at 272 nm consists of dominant UVB emissions at 312 nm corresponding to the P 7 / 2 → 8 S 7 / 2 6 transitions of Gd3+. The electron spin resonance (ESR) spectra of LaPO 4 :Gd3+ phosphor reveal three significant attributes with effective g-values around 6, 2.8, 2.0 and a feeble characteristic at 4.8 owing primarily to the presence of Gd3+ ions in clustered species. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00304026
- Volume :
- 206
- Database :
- Academic Search Index
- Journal :
- Optik - International Journal for Light & Electron Optics
- Publication Type :
- Academic Journal
- Accession number :
- 142499699
- Full Text :
- https://doi.org/10.1016/j.ijleo.2019.164020