Solid-state reaction preparation and photoluminescence properties of Na{sub 2}Ba{sub 6}(Si{sub 2}O{sub 7})(SiO{sub 4}){sub 2}:Eu{sup 2+} phosphors
Graphical abstract: - Highlights: • Green-emitting phosphor powder Na{sub 2}Ba{sub 6}(Si{sub 2}O{sub 7})(SiO{sub 4}){sub 2}:Eu{sup 2+} was synthesized. • Two different emission centers occupied by Eu{sup 2+} were investigated. • The concentration quenching mechanism was studied. - Abstract: A kind of novel green-emitting phosphor Na{sub 2}Ba{sub 6}(Si{sub 2}O{sub 7})(SiO{sub 4}){sub 2}:Eu{sup 2+} was synthesized by a solid-state reaction. The phase formation of as-prepared sample was investigated by X-ray powder diffraction. The photoluminescence emission (PL) and excitation (PLE) spectra results indicated that the phosphor could be efficiently excited by ultraviolet (UV) light from 240 to 400 nm, and presented a broad green emission band with two-band profile suggesting two different emission centers occupied by Eu{sup 2+}. The critical quenching concentration of Eu{sup 2+} was determined to be 0.01 mol and the concentration quenching mechanism was also investigated.
- OSTI ID:
- 22341866
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 49; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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