Publication Date:
2015-07-24
Description:
Mn 2+ -doped phosphate glasses sensitized by Gd 3+ ions are investigated. Enhanced photoluminescence (PL) properties of the samples are found with the excitations expanding toward the deep-UV part of the spectrum. PL emission and excitation spectra correlated with the lifetime data consistently present evidences of the enhanced Mn 2+ emission in association with the energy transfer from Gd 3+ ions. In particular, the Gd 3+ codoping benefits greatly the energy harvesting of Mn 2+ ions, resulting in the enhanced and tunable excitations of Mn 2+ ions which expand toward the deep-UV part of the spectrum at 273 and 311 nm, respectively. Thus by Gd 3+ sensitizing, the excitation source of the Mn 2+ emission has covered the broad range of the spectrum from the original blue and near-UVA to the deep-UVB and UVC together with the enhanced emission in the green-to-red spectral region. The possible energy-transfer mechanisms involved are discussed.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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