A new long persistent blue-emitting Sr2ZnSi2O7:Eu2+, Dy3+ prepared by sol–gel method
2004; Elsevier BV; Volume: 58; Issue: 12-13 Linguagem: Inglês
10.1016/j.matlet.2003.11.014
ISSN1873-4979
AutoresLing Jiang, Chengkang Chang, Dali Mao, Bin Zhang,
Tópico(s)Luminescence and Fluorescent Materials
ResumoThis paper reports the detailed preparation and long lasting properties of Eu2+-activated Sr2ZnSi2O7 phosphor by sol–gel method. The preparation process of Sr2ZnSi2O7 was complicated and several intermediate phases were formed during the reaction process. The obtained phosphor showed two emission peaks at 385 and 457 nm, and they were due to the different Eu2+ luminescent centers in Sr2ZnSi2O7 host. Long afterglow was observed although the phosphor showed faint persistence. Investigation of thermoluminescence curve revealed one TL glow peak, which indicated the existence of the trap. The lifetime of the trap was calculated to be 212 s, which illustrated the faint afterglow.
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