Nanostructured TiO2 sensitized with CuS quantum dots for solar energy conversion

IF 2.8 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Research on Chemical Intermediates Pub Date : 2024-10-05 DOI:10.1007/s11164-024-05417-z

Renuka A. Pawar, Shivanand B. Teli, Sandip S. Patil, Kalyanrao M. Garadkar

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Abstract

The present paper contains the preparation of QDs sensitized on TiO₂ thin film as a photoanode for solar cell applications. The photoanode is developed by copper sulfide quantum dots (CuS QDs) on TiO₂ thin films using the successive ionic layer adsorption and reaction (SILAR). CuS QDs act as sensitizer because of its strong visible light absorption. Fabrication process comprises sensitizing CuS QDs on the surface of TiO₂ thin films controlled by 5 and 10 SILAR cycles. XRD study indicates the crystallite size of TiO₂/CuS QDs thin films is 11.6 and 13.7 nm for 5 and 10 cycles (cys), respectively. The outcome of UV-DRS and photoluminescence indicates the enhanced light absorption, reduction in bandgap and suppression of electron–hole pair recombination. The HR-TEM image revealed that the diameter of the TiO₂ is 10 nm and surroundings core-like CuS particles are observed. The TiO₂/CuS QDs (10 cys) configuration showed a better photoelectrochemical efficiency of 2.55% at 30 mW cm⁻² light intensity.

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利用 CuS 量子点敏化的纳米结构二氧化钛实现太阳能转换

本文介绍了硫化铜量子点（CuS QDs）在二氧化钛（TiO2）薄膜上敏化后作为太阳能电池光阳极的制备方法。硫化铜量子点（CuS QDs）是利用连续离子层吸附和反应（SILAR）技术在二氧化钛薄膜上制备的光阳极。硫化铜量子点具有很强的可见光吸收能力，因此可作为敏化剂。制备过程包括通过 5 次和 10 次 SILAR 循环控制 CuS QDs 在 TiO2 薄膜表面的敏化。XRD 研究表明，TiO2/CuS QDs 薄膜在 5 个和 10 个周期（cys）下的晶粒大小分别为 11.6 nm 和 13.7 nm。UV-DRS 和光致发光结果表明，薄膜的光吸收增强、带隙减小，电子-空穴对重组受到抑制。HR-TEM 图像显示，TiO2 的直径为 10 nm，周围观察到类似核心的 CuS 颗粒。在 30 mW cm-2 的光照强度下，TiO2/CuS QDs（10 cys）配置的光电化学效率为 2.55%。

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来源期刊

Research on Chemical Intermediates 化学-化学综合

CiteScore

5.70

自引率

18.20%

发文量

229

审稿时长

2.6 months

期刊介绍： Research on Chemical Intermediates publishes current research articles and concise dynamic reviews on the properties, structures and reactivities of intermediate species in all the various domains of chemistry. The journal also contains articles in related disciplines such as spectroscopy, molecular biology and biochemistry, atmospheric and environmental sciences, catalysis, photochemistry and photophysics. In addition, special issues dedicated to specific topics in the field are regularly published.