Raddaoui Z, El Kossi S, Smiri B, Al-Shahrani Thamraa, Dhahri J, Belmabrouk H
Laboratoire de la Matière Condensée et des Nanosciences, Université de Monastir, Faculté des Sciences de Monastir Avenue de l'environnement 5019 Monastir Tunisia.
Laboratoire de Micro-optoélectroniques et Nanostructures, Université de Monastir, Faculté des Sciences Monastir Avenue de l'environnement 5019 Monastir Tunisia.
RSC Adv. 2020 Jun 22;10(40):23615-23623. doi: 10.1039/d0ra04033a. eCollection 2020 Jun 19.
The vibrational and optical properties of an LaSrNaMnTiO (LSNMT) polycrystalline sample produced 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 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.
研究了通过固态反应制备的LaSrNaMnTiO（LSNMT）多晶样品的振动和光学性质。室温下的拉曼光谱揭示了我们化合物中的化学无序。基于吸收光谱估算了光学带隙和乌尔巴赫能量。此外，该多晶锰酸盐在514.5nm光激发下，在10K至300K的温度范围内，在近红外光（1000nm）中发光。晶体场分析表明，在LSNMT中仅发现了Mn发光中心。测量的活化证明我们的化合物具有良好的热稳定性。色度坐标证明LSNMT样品的发射发生在近红外区域。所有分析结果表明，LSNMT锰酸盐在白色发光器件中具有大量潜在应用。
