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首页> 外文期刊>RSC Advances >Raman scattering and red emission of Mn4+ in La0.7Sr0.25Na0.05Mn0.7Ti0.3O3 manganite phosphor for LED applications
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Raman scattering and red emission of Mn4+ in La0.7Sr0.25Na0.05Mn0.7Ti0.3O3 manganite phosphor for LED applications

机译：LA0.7SR0.25NA0.05MN0.7TI0.3O3锰散射和LA0.7SR0.25NA0.05MN0.7TI0.3O3锰磷光体的拉曼散射和红色发射

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摘要

The vibrational and optical properties of an La _(0.7) Sr _(0.25) Na _(0.05) Mn _(0.7) Ti _(0.3) O _(3) (LSNMT) polycrystalline sample produced via a solid-state reaction were studied. The Raman spectrum at room temperature reveals the chemical disorder in our compound. The optical gap and Urbach energy were estimated on the basis of the absorption spectrum. Moreover, the polycrystalline manganite radiates in the near-infrared light (1000 nm) with 514.5 nm light excitation and in the temperature range from 10 K to 300 K. Crystal field analysis suggests that only the Mn ~(4+) luminescent center is found in LSNMT. The measured activation proves that our compound possesses good thermostability. The chromaticity coordinates prove that the emission of the LSNMT sample occurs in the near-infrared region. All analytical findings demonstrate that LSNMT manganite has substantial prospective applications in white luminescent devices.
机译：通过固态反应产生的LA _（0.7）Sr _（0.25）α（0.25）Na _（0.05）Mn _（0.05）×（0.3）o _（LSNMT）的多晶样品的振动和光学性质研究过。室温下的拉曼光谱揭示了我们化合物中的化学障碍。基于吸收光谱估计光学间隙和URBACH能量。此外，多晶锰铁在近红外光（1000nm）中辐射514.5nm光激发，并且在10k至300​​k的温度范围内。晶体场分析表明，仅发现Mn〜（4+）发光中心在lsnmt。测量的活化证明了我们的化合物具有良好的热稳定性。色度坐标证明，在近红外区域发生LSNMT样品的发射。所有分析调查结果表明，LSNMT锰铁在白色发光器件中具有大量预期应用。

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