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<p>Various deposition techniques for titanium dioxide (TiO<sub>2</sub>) layers have been explored to enhance the performance of quantum dot-sensitized solar cells (QDSSCs). Cadmium sulfide (CdS) and zinc sulfide (ZnS) quantum dots were synthesized as sensitizers on TiO<sub>2</sub> photoanodes using the successive ionic layer adsorption and reaction (SILAR) method. Characterization via energy-dispersive x-ray (EDX) spectroscopy and x-ray diffraction (XRD) confirmed the composition of TiO<sub>2</sub>, CdS, and ZnS in the photoanode. TiO<sub>2</sub> layers with particle sizes of approximately 14&#xa0;nm and 21&#xa0;nm were deposited using spin coating and doctor blade techniques, resulting in 0.70&#xa0;µm and 30.70&#xa0;µm thicknesses, respectively. The combination of a spin-coated TiO<sub>2</sub> layer with smaller particle size and a doctor blade-coated TiO<sub>2</sub> layer with larger particle size demonstrated the most efficient charge transfer kinetics. This configuration yielded an optimal charge transfer resistance of 35.33 Ω at the photoanode/electrolyte interface and a power conversion efficiency (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11664_2025_12022_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">\(\eta\)</EquationSource> <EquationSource Format="MATHML"><math> <mi>η</mi> </math></EquationSource> </InlineEquation>) of 1.80%. These results emphasize that tailoring the TiO<sub>2</sub> layer thickness and particle size significantly influences the charge collection, recombination resistance, and overall performance of QDSSCs.</p> Graphical Abstract <p></p>

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Integrated TiO2/CdS/ZnS Layer Electrodes for Quantum Dot-Sensitized Solar Cells with Poly(acrylamide-co-acrylic acid)-Based Gel Polymer Electrolyte

  • 期刊论文

  • 发表日期：

    2025年6月3日

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  • Y. C. Lee,
  • M. H. Buraidah,
  • H. J. Woo,
  • L. P. Teo

摘要

Various deposition techniques for titanium dioxide (TiO2) layers have been explored to enhance the performance of quantum dot-sensitized solar cells (QDSSCs). Cadmium sulfide (CdS) and zinc sulfide (ZnS) quantum dots were synthesized as sensitizers on TiO2 photoanodes using the successive ionic layer adsorption and reaction (SILAR) method. Characterization via energy-dispersive x-ray (EDX) spectroscopy and x-ray diffraction (XRD) confirmed the composition of TiO2, CdS, and ZnS in the photoanode. TiO2 layers with particle sizes of approximately 14 nm and 21 nm were deposited using spin coating and doctor blade techniques, resulting in 0.70 µm and 30.70 µm thicknesses, respectively. The combination of a spin-coated TiO2 layer with smaller particle size and a doctor blade-coated TiO2 layer with larger particle size demonstrated the most efficient charge transfer kinetics. This configuration yielded an optimal charge transfer resistance of 35.33 Ω at the photoanode/electrolyte interface and a power conversion efficiency ( \(\eta\) η ) of 1.80%. These results emphasize that tailoring the TiO2 layer thickness and particle size significantly influences the charge collection, recombination resistance, and overall performance of QDSSCs.

Graphical Abstract