Red phosphorescence properties of Mn ions in MgO–GeO2 compounds
Open Access
- 1 January 2003
- journal article
- research article
- Published by Taylor & Francis in Science and Technology of Advanced Materials
- Vol. 4 (2) , 137-142
- https://doi.org/10.1016/s1468-6996(03)00025-1
Abstract
Red phosphorescence properties on Mn ions doped MgO–GeO2 compounds, Mg4GeO6, Mg2GeO4, and MgGeO3, were investigated. The red phosphorescence was observed in MgGeO3:Mn2+. The red phosphorescence intensity of MgGeO3:Mn2+ increased with adding the MgF2 and Yb2O3. The red phosphorescence duration time of sample with a batch composition of 44 mol%-MgO, 6 mol%-MgF2, 50 mol%-GeO2, 0.1 mol%-MnO, and 0.05 mol%-Yb2O3 is approximately 30 min. The mechanism of red phosphorescence in MgGeO3:Mn2+ is discussed in terms of the relationship between valency state of manganese ions and point defects in matrix compound.Keywords
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