通过铁/钴双掺杂调整氧化锌纳米粒子的光学特性

IF 0.9 4区 物理与天体物理 Q4 PHYSICS, CONDENSED MATTER Physics of the Solid State Pub Date : 2024-04-01 DOI:10.1134/S1063783423600413
Basmah J. Alotibi, Aicha Loucif, Abdul Majid
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引用次数: 0

摘要

摘要 本研究旨在探讨铁和钴的双重掺杂对氧化锌纳米粒子(NPs)的微观结构、形态和光学性能的影响。采用高纯度 ZnO、Fe 和 Co NPs,通过固态反应法制备了 Zn0.97-xFe0.03CoxO(x = 0、0.01、0.02 和 0.03)NPs。研究采用了 X 射线衍射 (XRD)、场发射扫描电子显微镜 (FE-SEM)、紫外可见分光光度法、光致发光 (PL) 和能量色散 X 射线光谱法 (EDS)。XRD 分析表明,所有样品都呈现出纯粹的六方菱形结构,没有任何铁、钴或其氧化物的痕迹,这表明掺杂离子是很好地取代了锌离子。然而,Zn0.94Fe0.03Co0.03O 样品的光谱中出现了一些峰值,对应于次级尖晶石相 ZnCo2O4 和 CoFe2O4。FE-SEM 显微照片显示,所有样品都呈现球状颗粒,其大小、聚集程度和形态略受掺杂剂含量的影响。估计带隙值从未掺杂 ZnO 的 3.24 eV 下降到 Zn0.95Fe0.03Co0.02O NPs 的 3.17 eV,然后略有上升。此外,还利用 Moss、Ravindra Hervé-Vandamme 和 Reddy 模型从带隙能评估了折射率,并进行了比较。所有样品的聚光光谱在紫外区都显示出强烈而尖锐的发射峰,随着钴含量的增加,发射峰的强度也在增加。
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Tailoring the Optical Characteristics of ZnO Nanoparticles by Fe/Co Dual-Doping

The purpose of this study was to investigate the influence of dual doping with Fe and Co on the microstructural, morphological, and optical properties of ZnO nanoparticles (NPs). Zn0.97–xFe0.03CoxO (x = 0, 0.01, 0.02, and 0.03) NPs were prepared via a solid-state reaction method using high-purity ZnO, Fe, and Co NPs. This study was performed using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), UV-visible spectrophotometry, photoluminescence (PL), and energy-dispersive X‑ray spectroscopy (EDS). XRD analysis revealed that all samples presented a pure hexagonal wurtzite str-ucture without any trace of Fe, Co, or their oxides, indicating that the dopant ions were well-substituted Zn ions. However, some peaks appear in the spectrum of the Zn0.94Fe0.03Co0.03O sample, corresponding to the secondary spinel phases ZnCo2O4 and CoFe2O4. FE-SEM micrographs showed that all samples exhibited sphere-like particles, and their sizes, aggregation degree, and morphology were slightly influenced by the dopant content. The estimated bandgap values decreased from 3.24 eV for undoped ZnO to 3.17 eV for Zn0.95Fe0.03Co0.02O NPs and then slightly increased. Moreover, the refractive index was evaluated from the bandgap energy using Moss, Ravindra Hervé-Vandamme, and Reddy models, and then compared. The PL spectra of all samples revealed strong and sharp emission peaks in the UV region, which increased in intensity as the Co content increased.

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来源期刊
Physics of the Solid State
Physics of the Solid State 物理-物理:凝聚态物理
CiteScore
1.70
自引率
0.00%
发文量
60
审稿时长
2-4 weeks
期刊介绍: Presents the latest results from Russia’s leading researchers in condensed matter physics at the Russian Academy of Sciences and other prestigious institutions. Covers all areas of solid state physics including solid state optics, solid state acoustics, electronic and vibrational spectra, phase transitions, ferroelectricity, magnetism, and superconductivity. Also presents review papers on the most important problems in solid state physics.
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