| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1494522 | Optical Materials | 2013 | 4 Pages |
•Fabrication of Eu-doped La2Si6O3N8 phosphors by spark plasma sintering method.•La2Si6O3N8:Eu2+ phosphors exhibit a bluish-green emission under NUV excitation.•Post-annealing and acid-washing improved the emission intensity of the phosphors.
Bluish green-emitting La2Si6O3N8:Eu2+ phosphors were synthesized by a spark plasma sintering (SPS) method, and the effects of sintering temperature, Eu doping concentration, post-annealing, and acid washing on the photoluminescence (PL) properties were investigated. A single phase La2Si6O3N8:Eu2+ was successfully achieved at 1700 °C by SPS. As-synthesized La2Si6O3N8:Eu2+ phosphors exhibited a single band emission centered at 483–496 nm under the excitation of 370 nm. The post-annealing and acid-washing significantly improved the emission intensity by increasing the crystallinity, reducing the carbon content, and changing the morphology of particles. Unexpectedly, La2Si6O3N8:Eu2+ phosphors showed a strong thermal quenching.
