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

[摘要] New compounds of rare earth complex oxides with perovskite structure in a combination of La with Eu ions and Mn with Zn ions, La_{1â€�?�ð�?��?}Eu_ð‘�?Mn_0.9Zn_0.1O_{3+ð‘�??} (LEMZ) (0.0 â‰�? ð‘�? â‰�? 0.32) in A and B sites, respectively were synthesized. X-ray powder diffraction (XRD), fourier transform infrared spectroscopy (FTâ€�?�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 FTâ€�?�IR spectra were in agreement with those of XRD. High-quality nanopowders with controlled stoichiometry and microstructure were prepared at a temperature range of 700â€�??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 ${}^{5}D_{0} ightarrow {}^{7}F_{J}$ (𝐽 = 0â€�??6) transitions of the 4ð‘�?? electrons of Eu³⁺ ions. The structure, homogeneity and particle size of the obtained compounds during different stages were investigated by scanning electron microscopy (SEM).

[学科分类] 材料工程

[关键词] Lanthanum;manganese;europium;perovskite;solâ€�?�gel;luminescence.