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A new BaB2Si2O8:Eu2+/Eu3+, Tb3+ phosphor – Synthesis and photoluminescence properties

✍ Scribed by M.P. Saradhi; S. Boudin; U.V. Varadaraju; B. Raveau

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
686 KB
Volume
183
Category
Article
ISSN
0022-4596

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✦ Synopsis

In the present work, we have synthesized maleevite mineral phase BaB 2 Si 2 O 8 for the first time, which is isostructural with the pekovite mineral SrB 2 Si 2 O 8 . In these europium doped host lattices, we observed the partial reduction of Eu 3 + to Eu 2 + at high temperature during the synthesis in air. Tb 3 + co-doping in MB 2 Si 2 O 8 :0.01(Eu 3 + /Eu 2 + ) [M ¼Sr, Ba] improves the emission properties towards white light. The emission color varies from bluish white to greenish white under UV lamp excitation when the host cation changes from Sr to Ba.

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