x = 0.25和x = 0.5条件下SrTb1−xNixO3纳米粒子的合成、结构、光学和磁性表征应用领域:光电器件

IF 2.2 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY
O. Hnainia, L. Bessais, M. Jemmali, H. Chaker
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引用次数: 0

摘要

钙钛矿类结构由于其在开发创新材料方面的工业意义而继续引起相当大的关注,这些材料在各个领域都有实际应用,包括白光led、太阳能电池、传感器和光催化剂。具有特殊光学性质的ALnO₃氧化物半导体纳米结构的发展对光电子和发光工业至关重要。本研究采用溶胶-凝胶法合成了x值为0.25和0.5的SrTb1−xNixO3化合物。SrTb1−xNixO3化合物(x = 0.25和x = 0.5)的结构、光学和磁性通过各种分析进行评估,包括x射线衍射(XRD)、扫描电子显微镜(SEM)、拉曼光谱、紫外可见吸收和磁化率测量。x射线衍射研究表明,SrTb0.75Ni0.25O3和SrTb0.5Ni0.5O3均在具有Pnma空间群的正交晶系中结晶。扫描电镜测得的形貌和平均晶粒尺寸约为500-600 nm。利用能量色散x射线光谱(EDX)进行元素分析,确定了SrTb0.75Ni0.25O3和SrTb0.5Ni0.5O3的元素组成。50的影响% nickel substitution in the SrTbO3 compound has been investigated using Raman spectroscopy, and the findings have been correlated with the perovskite structure. The orthorhombic symmetry (No. 62, \({D}_{2h}^{16}\)) was characterized by several Raman bands associated with the bending and stretching of (Tb/Ni)O6 octahedra and the presence of oxygen vacancies. UV–visible studies indicated absorption in the blue light region, attributed to the yellow-green color of the samples. The direct optical band gaps for SrTb0.75Ni0.25O3 and SrTb0.5Ni0.5O3 were found to be approximately 1.53 eV and 1.28 eV, respectively. These relatively low values suggest that these materials are semiconductors with promising potential for optoelectronic devices. Additionally, the yellowness of these compounds decreased compared to the parent oxide SrTbO3 after substituting terbium with nickel. Magnetic susceptibility measurements were conducted for both compounds in a temperature range of 2 K–300 K. Both compounds exhibited antiferromagnetic transitions at 31.46 K for SrTb0.75Ni0.25O3 and at 32.3 K for SrTb0.5Ni0.5O3. Temperature-dependent magnetic susceptibilities were measured under zero-field-cooled (ZFC) and field-cooled (FC) conditions. A slight difference between ZFC and FC was observed below the Néel temperatures for both compounds, indicating the onset of an antiferromagnetic moment below those temperatures.
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Synthesis, structural, optical and magnetic characterizations of SrTb1−xNixO3 nano particules for x = 0.25 and x = 0.5. Application: optoelectronics devices

Synthesis, structural, optical and magnetic characterizations of SrTb1−xNixO3 nano particules for x = 0.25 and x = 0.5. Application: optoelectronics devices

Perovskite-like structures continue to attract considerable attention due to their industrial significance in developing innovative materials with practical applications across various fields, including white LEDs, solar cells, sensors, and photocatalysts. The advancement of ALnO₃ oxide semiconductor nanostructures with specific optical properties is crucial for the optoelectronics and luminescence industries. In this study, SrTb1−xNixO3 compounds with x values of 0.25 and 0.5 were synthesized using the sol–gel method. The structural, optical, and magnetic properties of the SrTb1−xNixO3 compounds (for x = 0.25 and x = 0.5) were assessed through various analyses, including x-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, UV–Vis absorption, and magnetic susceptibility measurements. X-Ray Diffraction studies showed that both compositions, SrTb0.75Ni0.25O3 and SrTb0.5Ni0.5O3, crystallized in an orthorhombic system with the space group Pnma. The morphology and average grain size, as measured by scanning electron microscopy, were approximately 500–600 nm. Elemental analysis using energy-dispersive x-ray spectroscopy (EDX) allowed for the identification of the elemental composition of SrTb0.75Ni0.25O3 and SrTb0.5Ni0.5O3. The effect of 50% nickel substitution in the SrTbO3 compound has been investigated using Raman spectroscopy, and the findings have been correlated with the perovskite structure. The orthorhombic symmetry (No. 62, \({D}_{2h}^{16}\)) was characterized by several Raman bands associated with the bending and stretching of (Tb/Ni)O6 octahedra and the presence of oxygen vacancies. UV–visible studies indicated absorption in the blue light region, attributed to the yellow-green color of the samples. The direct optical band gaps for SrTb0.75Ni0.25O3 and SrTb0.5Ni0.5O3 were found to be approximately 1.53 eV and 1.28 eV, respectively. These relatively low values suggest that these materials are semiconductors with promising potential for optoelectronic devices. Additionally, the yellowness of these compounds decreased compared to the parent oxide SrTbO3 after substituting terbium with nickel. Magnetic susceptibility measurements were conducted for both compounds in a temperature range of 2 K–300 K. Both compounds exhibited antiferromagnetic transitions at 31.46 K for SrTb0.75Ni0.25O3 and at 32.3 K for SrTb0.5Ni0.5O3. Temperature-dependent magnetic susceptibilities were measured under zero-field-cooled (ZFC) and field-cooled (FC) conditions. A slight difference between ZFC and FC was observed below the Néel temperatures for both compounds, indicating the onset of an antiferromagnetic moment below those temperatures.

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来源期刊
CiteScore
4.40
自引率
8.30%
发文量
230
审稿时长
5.6 months
期刊介绍: JICS is an international journal covering general fields of chemistry. JICS welcomes high quality original papers in English dealing with experimental, theoretical and applied research related to all branches of chemistry. These include the fields of analytical, inorganic, organic and physical chemistry as well as the chemical biology area. Review articles discussing specific areas of chemistry of current chemical or biological importance are also published. JICS ensures visibility of your research results to a worldwide audience in science. You are kindly invited to submit your manuscript to the Editor-in-Chief or Regional Editor. All contributions in the form of original papers or short communications will be peer reviewed and published free of charge after acceptance.
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