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Synthesis and luminescence properties of double perovskite Ba2MgGe2O7:Mn4+ deep red phosphor.
- Source :
-
Journal of Luminescence . Nov2018, Vol. 203, p420-426. 7p. - Publication Year :
- 2018
-
Abstract
- A deep red-emitting Ba 2 MgGe 2 O 7 :Mn 4+ (BMG:Mn 4+ ) phosphor was synthesized by conventional solid-state reaction. 4 A 2g → 4 T 1g , 4 A 1g → 4 T 2g , and 4 A 2g → 2 T 2g transitions of Mn 4+ ions resulted in three absorption bands centered at 305, 330, and 420 nm, respectively. The phosphor showed a broad emission band from 600 nm to 700 nm due to 2 E→ 4 A 2 transition of Mn 4+ ions. The highest luminous peak located at 660 nm, and the highest luminous intensity was achieved at high Mn 4+ concentration (0.013). Multipolar interaction was the major mechanism for fluorescence quenching, and dipole–dipole interaction was the type of interaction mechanism between Mn 4+ ions. Fluorescence lifetimes decreased from 0.898 ms to 0.746 ms, which accorded with the requirement of white light-emitting diode phosphor. Color coordinates of BMG:Mn 4+ phosphors (0.721, 0.279) were close to the standard values of the National TV Standards Committee. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222313
- Volume :
- 203
- Database :
- Academic Search Index
- Journal :
- Journal of Luminescence
- Publication Type :
- Academic Journal
- Accession number :
- 131031011
- Full Text :
- https://doi.org/10.1016/j.jlumin.2018.06.061