Preparation, crystal structure and photoluminescence of Mn-doped magnesium pyroborates solid solutions, (Mg1-xMnx)2B2O5 |
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Authors: | Tetsuya Kawano |
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Institution: | Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan |
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Abstract: | Solid solutions of manganese(II)-doped magnesium pyroborate, ((Mg1−xMnx)2B2O5, 0<x≤0.30, triclinic system, space group: P1¯ (no. 2)), were synthesized by solid state reaction. The unit cell parameters were refined by the Rietveld method of powder X-ray diffraction patterns. (Mg1−xMnx)2B2O5 showed broad red emission at 670 nm under 414 nm excitation. The wavelengths of the emission peak did not depend on the manganese content. Absorption of the d-d transitions of Mn2+ ions was observed in the photoluminescence excitation spectra. The emission intensity reached the maximum at a Mn content (x) of 0.05 and decreased with increasing x from 0.05 to 0.30. |
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Keywords: | Manganese(II) ion Triclinic magnesium pyroborate Solid state reaction Crystal structure Powder X-ray diffraction Photoluminescence |
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