Back to Search
Start Over
Synthesis of Gd2Ti2O7:Eu3+, V4+ phosphors by sol–gel process and its luminescent properties
- Source :
-
Journal of Luminescence . Dec2007, Vol. 127 Issue 2, p561-567. 7p. - Publication Year :
- 2007
-
Abstract
- Abstract: A red-emitting phosphor material, Gd2Ti2O7:Eu3+, V4+, by added vanadium ions is synthesized using the sol–gel method. Phosphor characterization by high-resolution transmission electron microscopy shows that the phosphor possesses a good crystalline structure, while scanning electron microscopy reveals a uniform phosphor particle size in the range of 230–270nm. X-ray photon electron spectrum analysis demonstrates that the V4+ ion promotes an electron dipole transition of Gd2Ti2O7:Eu3+ phosphors, causing a new red-emitting phenomenon, and CIE value shifts to x=0.63, y=0.34 (a purer red region) from x=0.57, y=0.33 (CIE of Gd2Ti2O7:Eu3+). The optimal composition of the novel red-emitting phosphor is about 26% of V4+ ions while the material is calcinated at 800 °C. The results of electroluminescent property of the material by field emission experiment by CNT-contained cathode agreed well with that of photoluminescent analysis. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00222313
- Volume :
- 127
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Luminescence
- Publication Type :
- Academic Journal
- Accession number :
- 26250451
- Full Text :
- https://doi.org/10.1016/j.jlumin.2007.03.010