Abstract Iron doped (in the range from 1 to 10 mol %) ZnO nanoparticles (NPs) were obtained by microwave hydrothermal method. The effects of iron content on morphology, crystal structure, optical and magnetic properties of ZnO nanoparticles were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), cathodoluminescence (CL), photoluminescence (PL) and magnetic measurements. XRD studies revealed presence of ZnFe2O4 foreign phase in NPs for iron doping concentrations above 5% placing the solubility limit of Fe in ZnO NPs near this value. The photoluminescence and cathodoluminescence spectra show an increase of the intensity ratio between near band edge (NBE) and deep level emission band (DLE) of ZnO, which is tentatively related by us with intrinsic cracking of ZnO crystals. The blue-shift of NBE band maxima was observed as a concentration of Fe dopant increases. The results of magnetic measurements indicate superparamagnetic behavior of nanoparticles.

中文翻译：

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铁含量对微波水热法制备纳米ZnO性能的影响

摘要 通过微波水热法制备了铁掺杂（1~10 mol%）ZnO纳米颗粒（NPs）。通过扫描电子显微镜 (SEM)、X 射线衍射 (XRD)、能量色散 X 射线光谱 (EDX)、阴极发光 (CL) 等研究了铁含量对 ZnO 纳米粒子形貌、晶体结构、光学和磁学性质的影响。 )、光致发光 (PL) 和磁性测量。XRD 研究表明，当铁掺杂浓度高于 5% 时，NPs 中存在 ZnFe2O4 异相，使得 Fe 在 ZnO NPs 中的溶解度极限接近该值。光致发光和阴极发光光谱显示 ZnO 的近带边缘 (NBE) 和深能级发射带 (DLE) 之间的强度比增加，我们暂时将其与 ZnO 晶体的本征开裂联系起来。随着 Fe 掺杂剂浓度的增加，观察到 NBE 带最大值的蓝移。磁性测量的结果表明纳米颗粒的超顺磁性行为。