The physical properties of spinel cubic Co3O4 thin films prepared by a PSM

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Main Group Chemistry Pub Date : 2022-03-19 DOI:10.3233/mgc-210090

Z. Bencharef, A. Chala, R. Messemeche, Y. Benkhetta

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Abstract

Undoped and Mn-doped Co3O4 films were deposited on heated glasses substrates (TS = 400°C) using a homemade pneumatic spray method (PSM). The solution concentration and deposition time are 0.1 M and 4 min respectively. The effect of manganese doping concentration on structural, optical and electrical properties of cobalt oxide were investigated. The elaborated films were characterized by X-ray diffraction, UV-Vis spectroscopy, atomic force microscopy (AFM) the three-dimensional (3D), energy dispersive spectroscopy (EDS), and four points probe measurements. The XRD study showed that all films were polycrystalline consisting with spinel cubic phase orientated along to (111) plane. The lattice strain and crystallite size were estimated by Williamson-Hall method. The morphology of Mn-doped Co3O4 thin films shows a homogeneous surface with straight acicular nanorods (SANRs). EDS analysis showed the presence of peaks associated with Co, O and Mn elements which confirm the composition of the thin films. The optical band gaps varies from 1.42±0.07 to 1.47±0.07 eV of Egop1and Egop2 varies from 1.87±0.10 to 2.11±0.11 eV. In addition, the electrical measurement show a maximum electrical conductivity (σ= 15.54±0.78 (Ω.cm) - 1) at 6% wt of Mn.

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PSM制备尖晶石立方Co3O4薄膜的物理性能

采用自制的气动喷涂法(PSM)在加热的玻璃衬底(TS = 400°C)上沉积未掺杂和掺杂锰的Co3O4薄膜。溶液浓度为0.1 M，沉积时间为4 min。研究了锰掺杂浓度对氧化钴结构、光学和电学性能的影响。通过x射线衍射、紫外可见光谱、原子力显微镜(AFM)、三维(3D)、能谱(EDS)和四点探针测量对制备的膜进行了表征。XRD研究表明，所有薄膜均为尖晶石立方相组成的多晶，沿(111)面取向。用Williamson-Hall法估计了晶格应变和晶粒尺寸。mn掺杂的Co3O4薄膜表面呈均匀的直针状纳米棒结构。能谱分析表明，薄膜中存在Co、O和Mn元素相关峰，证实了薄膜的成分。egop1的光学带隙在1.42±0.07 ~ 1.47±0.07 eV之间，Egop2的光学带隙在1.87±0.10 ~ 2.11±0.11 eV之间。此外，电学测量显示，在6% wt Mn下，最大电导率(σ= 15.54±0.78 (Ω.cm) - 1)。

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来源期刊

Main Group Chemistry 化学-化学综合

CiteScore

2.00

自引率

26.70%

发文量

审稿时长

>12 weeks

期刊介绍： Main Group Chemistry is intended to be a primary resource for all chemistry, engineering, biological, and materials researchers in both academia and in industry with an interest in the elements from the groups 1, 2, 12–18, lanthanides and actinides. The journal is committed to maintaining a high standard for its publications. This will be ensured by a rigorous peer-review process with most articles being reviewed by at least one editorial board member. Additionally, all manuscripts will be proofread and corrected by a dedicated copy editor located at the University of Kentucky.