Enhanced red emission in Li2Mg3TiO6: Mn4+ phosphor via Na+ and Ge4+ doping
Source abstract
Abstract
Abstract Li2Mg3TiO6: Mn4+/Na+/Ge4+ phosphors with rock structure have been prepared via solid state reaction method. The phosphor has broad excitation band ranging from 265 nm to 600 nm with two peaks at 345 nm and 468 nm and can give strong red emission band peaking at 667 nm. The co-doped Na+/Ge4+ ions largely improve the luminescence properties of Li2Mg3TiO6: Mn4+. It is found that the luminescence intensity of Li2Mg3TiO6: Mn4+/Na+/Ge4+ is increased by 132% as compared with that of Li2Mg3TiO6: Mn4+ phosphor. Meanwhile the quantum efficiency of Li2Mg3TiO6: Mn4+/Na+/Ge4+ has also increased from 32.83% to 53.55%. The mechanism of luminescence improvement may be attributed to the lowered symmetry of [TiO6] octahedral sites in Li2Mg3TiO6 host induced by the doped Na + ions and the reduction of energy transfer probability among Mn4+ ions caused by the doped Ge4+ ions. The developed phosphor with suitable spectral properties has potential application in white-LEDs and plant growth.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Microwave Dielectric Ceramics Synthesis · Advanced Photocatalysis Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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