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Enhanced green luminescence and energy transfer studies in Ce3+/Tb3+-codoped α-zirconium phosphate nanosheet.
- Source :
-
Journal of Luminescence . Dec2016, Vol. 180, p214-218. 5p. - Publication Year :
- 2016
-
Abstract
- The rare earth Ce 3+ and Tb 3+ ions -doped α-zirconium phosphate [Zr(HPO 4 ) 2 , abbreviated as ZrP] nanosheet phosphors were prepared by direct precipitation process at ambient temperature. The X-ray diffraction (XRD), field-emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), photoluminescence emission and excitation spectra and the fluorescent lifetime measurements were used to characterize the crystal structure, morphology as well as the luminescent properties of the phosphor system. The Ce 3+ or/and Tb 3+ ions-doped ZrP system clearly exhibited nanosheet structure, as can be confirmed from their XRD and SEM results. Excited with ultra-violet (UV) light 368 nm, the Ce 3+ /Tb 3+ -codoped ZrP showed intense green emission at 546 nm corresponding to the 5 D 4 → 7 F 5 transition of Tb 3+ . With the increase of Ce 3+ doping concentration, the luminescent intensity and fluorescence lifetimes of Tb 3+ were gradually increased. The results manifested that the obvious energy transfer phenomenon from Ce 3+ to Tb 3+ happened, and the energy transfer mechanism should be due to the dipole–quadrupole interaction. Moreover, the chromaticity coordinate of ZrP:Ce 3+ ,Tb 3+ nanosheet was also studied, and the emission color can be adjusted from blue-greenish to green by increasing the Ce 3+ concentration. The ZrP:Ce 3+ ,Tb 3+ nanosheet may be used as a green-light emitting candidate for the optoelectronic devices such as electroluminescence panels or white light-emitting diodes. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222313
- Volume :
- 180
- Database :
- Academic Search Index
- Journal :
- Journal of Luminescence
- Publication Type :
- Academic Journal
- Accession number :
- 118497310
- Full Text :
- https://doi.org/10.1016/j.jlumin.2016.08.053