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Multifunctional Plasmonic WO3-X@CdS Heterojunction Engineering to Achieve Efficient Perovskite Solar Cells.

Zheng Lv1,2, Zonghan Guo1, Dan Li1

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|October 2, 2025
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Summary

Researchers developed WO3-X @CdS heterojunctions to enhance perovskite solar cells (PSCs). This boosts light absorption and power conversion efficiency to 25.08% for broadband applications.

Keywords:
WO3-X@CdS heterojunctionband alignmentcrystallization regulationionic coordinationlight absorption extensionperovskite solar cells

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Photovoltaics

Background:

  • Perovskite solar cells (PSCs) face limitations in light-harvesting spectrum.
  • Oxygen vacancies in WO3-X nanorods offer potential for enhanced properties.

Purpose of the Study:

  • To broaden the light-harvesting spectrum of PSCs.
  • To improve the performance and stability of PSCs through novel heterojunction engineering.

Main Methods:

  • Synthesis of WO3-X @CdS heterojunctions via in situ growth of CdS nanoparticles on WO3-X nanorods.
  • Incorporation of WO3-X @CdS into perovskite layers using the antisolvent method.
  • Characterization of optical and electronic properties, including localized surface plasmon resonance (LSPR) and carrier dynamics.

Main Results:

  • WO3-X @CdS heterojunctions extended photon absorption into the near-infrared region due to LSPR.
  • Improved nucleation and crystallization of high-quality perovskite films were achieved.
  • Optimized energy alignment and accelerated interfacial charge transfer were observed.
  • Achieved a power conversion efficiency (PCE) of 25.08% for the modified PSCs.

Conclusions:

  • Heterojunction engineering with WO3-X @CdS is a viable strategy for developing broadband PSCs.
  • The dual-functional material enhances spectral response and carrier dynamics, leading to higher PCE.
  • This approach shows promise for advancing PSC technology and other optoelectronic devices.