Cu-Doped TiO2 Thin Films by Spin Coating: Investigation of Structural and Optical Properties

IF 3.1 4区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Inorganics Pub Date : 2024-07-08 DOI:10.3390/inorganics12070188

Syrine Sassi, Amal Bouich, A. Hajjaji, L. Khezami, B. Bessais, B. M. Soucase

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Abstract

Cu-doped TiO2 films were synthesized directly on FTO glass with a spin coating method. With a variation in copper amount, samples were prepared with 0%, 1%, 2%, 4% and 8% of dopant concentrations. Morphological and structural characterization of undoped and Cu-doped TiO2 samples were investigated and the obtained results showed the small, spherical shapes of the nanoparticles forming a thin film on top of FTO glass and their preferred orientation of TiO2 anatase (101), which is the same for each sample. However, this peak exhibited a slight shift for the 2% sample, related to the inflation of the microstrain compared to the other samples. For the optical properties, the 4% sample displayed the highest transmittance whereas the 2% sample exhibited the lowest band gap energy of 2.96 eV. Moreover, the PL intensity seems to be at its highest for the 2% sample due to the present peaking defects in the structure, whereas the 8% sample shows a whole new signal that is related to copper oxide. These properties make this material a potential candidate to perform as an electron transport layer (ETL) in solar cells and enhance their power conversion efficiency.

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自旋镀膜法掺铜二氧化钛薄膜：结构和光学特性研究

采用旋涂法在 FTO 玻璃上直接合成了掺铜 TiO2 薄膜。随着铜含量的变化，制备了掺杂浓度分别为 0%、1%、2%、4% 和 8%的样品。研究了未掺杂和掺铜 TiO2 样品的形态和结构特征，结果表明，在 FTO 玻璃上形成薄膜的纳米粒子呈小球形，其首选取向为 TiO2 锐钛矿（101），每个样品都相同。不过，与其他样品相比，2% 样品的峰值略有偏移，这与微应变膨胀有关。在光学特性方面，4% 样品的透射率最高，而 2% 样品的带隙能最低，为 2.96 eV。此外，由于结构中存在峰值缺陷，2% 样品的 PL 强度似乎最高，而 8% 样品则显示出与氧化铜有关的全新信号。这些特性使这种材料成为太阳能电池中电子传输层（ETL）的潜在候选材料，并能提高其功率转换效率。

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来源期刊

Inorganics Chemistry-Inorganic Chemistry

CiteScore

2.80

自引率

10.30%

发文量

193

审稿时长

6 weeks

期刊介绍： Inorganics is an open access journal that covers all aspects of inorganic chemistry research. Topics include but are not limited to: synthesis and characterization of inorganic compounds, complexes and materials structure and bonding in inorganic molecular and solid state compounds spectroscopic, magnetic, physical and chemical properties of inorganic compounds chemical reactivity, physical properties and applications of inorganic compounds and materials mechanisms of inorganic reactions organometallic compounds inorganic cluster chemistry heterogenous and homogeneous catalytic reactions promoted by inorganic compounds thermodynamics and kinetics of significant new and known inorganic compounds supramolecular systems and coordination polymers bio-inorganic chemistry and applications of inorganic compounds in biological systems and medicine environmental and sustainable energy applications of inorganic compounds and materials MD