Temperature-dependent photoluminescence properties of deep-red emitting Mn4+-activated magnesium fluorogermanate phosphors
- Resource Type
- Article
- Authors
- Shao, Qiyue; Lin, Huanyun; Hu, Jinlin; Dong, Yan; Jiang, Jianqing
- Source
- Journal of Alloys & Compounds. Mar2013, Vol. 552, p370-375. 6p.
- Subject
- *MANGANESE isotopes
*PHOTOLUMINESCENCE
*ACTIVATION (Chemistry)
*CHEMICAL synthesis
*PHOSPHORS
*SOLID state chemistry
*CHEMICAL reactions
*EFFECT of temperature on metals
- Language
- ISSN
- 0925-8388
Abstract: Deep-red emitting Mn4+-activated magnesium fluorogermanate (MFG:Mn4+) phosphors have been synthesized by the solid-state reaction technique. Temperature-dependent photoluminescence properties of MFG:Mn4+ phosphors with various activator concentrations (0.001–0.015) were studied. The temperature dependence relation of the Mn4+ ions luminescence depends on activator concentrations, excitation wavelengths and emission bands that are measured. This luminescent temperature effect can be explained by the shifts of excitation spectra with temperature and the thermally activated concentration quenching. The MFG:Mn4+ phosphors can be effectively excited by near-UV or blue light and emit deep-red light, and simultaneously exhibit excellent resistibility against luminescent thermal quenching in the temperature range from 30 to 200°C, which make them promising candidates of deep-red phosphors for white-LEDs applications. [Copyright &y& Elsevier]