Study of Copper Tin Selenide Nanoparticles of Milled Powder and Thin Films

IF 0.8 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Nano Research Pub Date : 2022-03-21 DOI:10.4028/p-0069ke

Hadjer Rekkache, Houda Kassentini, L. Bechiri, N. Benslim, A. Amara, X. Portier, P. Marie

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Abstract

Nanoparticles Cu2SnSe3 alloys were synthesized by mechanical alloying from mixtures of pure crystalline Cu, Sn and Se powders using a low cost planetary ball milling process optimizing the milling duration and the rotational speed. The properties of Cu2SnSe3 (CTSe) thin films deposited by thermal evaporation from this powder on glass substrate at Ts = 400°C were investigated. Powders and films were analyzed by X-ray diffraction (XRD), scanning electron microscopy(SEM), energy dispersive X-ray analysis (EDX), atomic force microscopy (AFM), to determine their microstructure, morphology, chemical compositions and root-mean-square (RMS) roughness. XRD analysis revealed that all samples crystallize in polycrystalline nature with cubic structure and lattice parameter a = 5.68 Å. The optical measurements were carried out in the [500-2500nm] wavelength range and were determined from spectral transmission data. Optical measurements showed that the deposited layers had a relatively high absorption coefficient of 104 cm-1 and the direct energy band gap was found to be around Eg =1.29eV. The suitable p-type conductivity of CTSe thin films was confirmed by hot probe method. Other electrical parameters (carrier concentration np = 10.04x1018 cm-3, electrical resistivity ρ = 30.49x10-2 Ω cm and mobility μH = 94.33 cm2/V s) were measured at room temperature.

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硒化铜锡纳米颗粒粉体及薄膜的研究

采用低成本的行星球磨工艺，将纯晶Cu、Sn和Se粉末混合在一起，采用机械合金化方法合成纳米Cu2SnSe3合金，优化了研磨时间和转速。研究了在Ts = 400℃温度下，用该粉末在玻璃基板上热蒸发沉积Cu2SnSe3 (CTSe)薄膜的性能。采用x射线衍射(XRD)、扫描电子显微镜(SEM)、能量色散x射线分析(EDX)、原子力显微镜(AFM)对粉末和薄膜进行分析，确定其微观结构、形貌、化学成分和均方根(RMS)粗糙度。XRD分析表明，所有样品均为多晶，具有立方结构，晶格参数a = 5.68 Å。光学测量在[500-2500nm]波长范围内进行，并根据光谱透射数据确定。光学测量表明，沉积层具有较高的吸收系数104 cm-1，直接能带隙在Eg =1.29eV左右。用热探针法确定了CTSe薄膜的p型电导率。其他电学参数(载流子浓度np = 10.04 × 1018 cm-3，电阻率ρ = 30.49 × 10-2 Ω cm，迁移率μH = 94.33 cm2/V s)在室温下测量。

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来源期刊

Journal of Nano Research 工程技术-材料科学：综合

CiteScore

2.40

自引率

5.90%

发文量

审稿时长

4 months

期刊介绍： "Journal of Nano Research" (JNanoR) is a multidisciplinary journal, which publishes high quality scientific and engineering papers on all aspects of research in the area of nanoscience and nanotechnologies and wide practical application of achieved results. "Journal of Nano Research" is one of the largest periodicals in the field of nanoscience and nanotechnologies. All papers are peer-reviewed and edited. Authors retain the right to publish an extended and significantly updated version in another periodical.