• Abdolali Alemi

      Articles written in Bulletin of Materials Science

    • Preparation, characterization and luminescent properties of europium oxide doped nano LaMn0.9Zn0.1O3+𝑑 by sol–gel processing

      Abdolali Alemi Elnaz Karimpour Hossein Shokri

      More Details Abstract Fulltext PDF

      New compounds of rare earth complex oxides with perovskite structure in a combination of La with Eu ions and Mn with Zn ions, La1–𝑥Eu𝑥Mn0.9Zn0.1O3+𝑑 (LEMZ) (0.0 ≤ 𝑥 ≤ 0.32) in A and B sites, respectively were synthesized. X-ray powder diffraction (XRD), fourier transform infrared spectroscopy (FT–IR) and photoluminescence spectra (PL) were used to characterize the resulting nanoparticles. The powder X-ray diffraction peaks could be indexed as a rhombohedral cell. The results of FT–IR spectra were in agreement with those of XRD. High-quality nanopowders with controlled stoichiometry and microstructure were prepared at a temperature range of 700–800°C for 6 h, with mean particle sizes of ∼ 17.5 nm. Photoluminescence measurements showed Eu3+ ions characteristic red emission in crystalline LEMZ powders due to the ${}^{5}D_{0} \rightarrow {}^{7}F_{J}$ (𝐽 = 0–6) transitions of the 4𝑓 electrons of Eu3+ ions. The structure, homogeneity and particle size of the obtained compounds during different stages were investigated by scanning electron microscopy (SEM).

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