Red long-lasting luminescence in clinoenstatite |
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Authors: | A Lecointre B Viana A Bessière D Gourier |
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Institution: | a Laboratoire de Chimie de la Matière Condensée de Paris; UMR 7574 du CNRS, ENSCP, 11 Rue P&M Curie 75231 Paris Cedex 05, France b Biospace Lab, 10 rue Mercoeur, 75011 Paris, France |
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Abstract: | A long-lasting phosphor Ca0.2Zn0.9Mg0.9Si2O6:Eu2+, Dy3+, Mn2+ was prepared by a sol-gel method. Nanoparticles crystallizing in a clinoenstatite structure were obtained. Long persistent phosphorescence in the red has been observed with persistence time over one hour at 680 nm and was attributed to Mn2+ emission. The persistent luminescence is suggested to involve Eu2+ as a sensitizer, Dy3+ or Dy3+-related defect as a trap center and Mn2+ as the luminescent center. However, the details of the mechanism are still under further investigation. |
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Keywords: | Sol-gel method Persistent luminescence Thermoluminescence |
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