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Luminescence of SrGdGa3O7:RE3+(RE=Eu, Tb) phosphors and energy transfer from Gd3+ to RE3+
- Source :
-
Materials Research Bulletin . Feb2005, Vol. 40 Issue 2, p281-288. 8p. - Publication Year :
- 2005
-
Abstract
- Abstract: Eu3+- and Tb3+-activated SrGdGa3O7 phosphors were synthesized by the solid-state reaction and their luminescence properties were investigated. Sr(Gd1− x Eu x )Ga3O7 and Sr(Gd1− x Tb x )Ga3O7 formed continuous solid solution in the range of x =0–1.0. Unactivated SrGdGa3O7 exhibited a typical characteristic excitation and emission of Gd ion. The SrGdGa3O7:xEu3+ and SrGdGa3O7:xTb3+ phosphors also showed the well-known Eu3+ and Tb3+ excitation and emission. The energy transfer from Gd3+ to Eu3+ and Tb3+ were verified by photoluminescence spectra. The dependence of photoluminescence intensity on Eu3+ and Tb3+ concentration were also studied in detail and the photoluminescence (PL) intensity of SrGdGa3O7:Eu and SrGdGa3O7:Tb were compared with commercial phosphors, Y2O3:Eu and LaPO4:Ce,Tb. The luminescence decay measurements showed that the lifetimes of Eu3+ and Tb3+ were in the range of microsecond. The energy transfer from Gd3+ to Tb3+ was also observed in decay curve. [Copyright &y& Elsevier]
- Subjects :
- *PHOSPHORS
*IONS
*PHOTOLUMINESCENCE
*LUMINESCENCE
*ENERGY transfer
Subjects
Details
- Language :
- English
- ISSN :
- 00255408
- Volume :
- 40
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Materials Research Bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 17309876
- Full Text :
- https://doi.org/10.1016/j.materresbull.2004.10.011