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Synthesis, structure, and luminescence properties of a novel double-perovskite Sr2LaNbO6:Mn4+ phosphor.
- Source :
-
Materials Research Bulletin . Apr2017, Vol. 88, p258-265. 8p. - Publication Year :
- 2017
-
Abstract
- A novel phosphor, Sr 2 LaNbO 6 :Mn 4+ , is synthesized by conventional solid-state reaction. The phosphor can be excited at 300–500 nm and emit a deep-red light. An emission band peak of 694 nm is observed from the spin-forbidden transition 2 E → 4 A 2 of Mn 4+ ions. Energy transfer between the Mn 4+ –Mn 4+ pairs decreases fluorescence decay time from 0.815 ms to 0.512 ms. The resistance of luminescence against thermal impact is also investigated by emission spectroscopy at heating temperatures from 300 K to 500 K. The calculated activation energy Δ E (∼0.345 eV) demonstrate good thermal stability of the phosphors. All these results indicate that the phosphor can be applied in white-light-emitting diodes. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00255408
- Volume :
- 88
- Database :
- Academic Search Index
- Journal :
- Materials Research Bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 120954366
- Full Text :
- https://doi.org/10.1016/j.materresbull.2016.12.045