Enhancing low-temperature sensor applications: Synergistic effects of Ni doping and SnO2 interlayer on spin-coated ZnO thin films on glass substrate

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2024-10-13 DOI:10.1016/j.optmat.2024.116272

Maya Hanane Rezoug , Chewki Zegadi , Abdelkader Nouri , Nasr-Eddine Hamdadou , M'hamed Guezzoul

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Abstract

This study investigates the effects of Nickel doping and a SnO₂ interlayer on the structural, morphological, optical, and electrical properties of ZnO thin films. Undoped and Ni-doped ZnO films were fabricated on glass substrates, with and without an SnO₂ interlayer, using the sol-gel spin coating method. The samples—denoted as ZG (undoped ZnO), NZG (Ni-doped ZnO), ZSG (undoped ZnO with SnO₂ interlayer), and NZSG (Ni-doped ZnO with SnO₂ interlayer)—underwent comprehensive characterization via XRD, AFM, PL, UV–Vis spectroscopy, Hall effect measurements, Hot probe, and Two-point method. XRD analysis confirmed successful Ni incorporation and enhanced ZnO crystallinity, particularly in the presence of the SnO₂ interlayer. AFM analysis revealed improved grain distribution and size due to the synergistic effects of Ni doping and the SnO₂ interlayer. UV–Vis results indicated significant impacts on transparency and the Urbach energy, with Ni doping alone broadening the bandgap. PL measurements showed that the synergistic effects quenched UV luminescence associated with the glass substrate, enhancing visible luminescence. Chromaticity analysis suggested that ZSG and NZSG samples are suitable for warm blue region applications. Electrical measurements revealed n-type conductivity across all films except NZG, with Ni doping increasing resistivity. Additionally, the ZSG (PTC) sensor exhibited a slightly higher sensitivity (0.3852 Ω/°C) compared to the NZSG sensor (0.3782 Ω/°C), with a similar trend observed in NTC sensors. These findings suggest that Ni-doped ZnO films with SnO₂ interlayers could potentially serve as thermistors and RTDs, offering promising applications in temperature sensing and optoelectronics.

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增强低温传感器应用：玻璃基底上旋涂氧化锌薄膜的掺杂镍和二氧化锡中间层的协同效应

本研究探讨了掺镍和二氧化锡中间膜对氧化锌薄膜的结构、形态、光学和电学特性的影响。采用溶胶-凝胶旋涂法，在玻璃基底上制作了未掺杂和掺镍的氧化锌薄膜，分别添加和未添加二氧化锰中间膜。通过 XRD、原子力显微镜（AFM）、聚光光谱（PL）、紫外可见光谱、霍尔效应测量、热探针和两点法对这些样品进行了综合表征，分别命名为 ZG（未掺杂 ZnO）、NZG（掺镍 ZnO）、ZSG（未掺杂 ZnO，中间层为 SnO2）和 NZSG（掺镍 ZnO，中间层为 SnO2）。XRD 分析证实了镍的成功掺入和氧化锌结晶度的提高，尤其是在二氧化锡夹层存在的情况下。原子力显微镜分析表明，由于掺杂镍和二氧化锡中间层的协同作用，晶粒分布和尺寸得到了改善。紫外可见光结果表明，掺杂镍单独会拓宽带隙，对透明度和乌巴赫能有显著影响。PL 测量显示，协同效应熄灭了与玻璃基底相关的紫外发光，增强了可见光发光。色度分析表明，ZSG 和 NZSG 样品适用于暖蓝色区域应用。电学测量显示，除 NZG 外，所有薄膜都具有 n 型导电性，掺杂镍会增加电阻率。此外，ZSG（PTC）传感器的灵敏度（0.3852 Ω/°C）略高于 NZSG 传感器（0.3782 Ω/°C），NTC 传感器也有类似的趋势。这些研究结果表明，带有二氧化硫夹层的掺镍氧化锌薄膜有可能用作热敏电阻和热电阻，在温度传感和光电子学领域具有广阔的应用前景。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.