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<p>Commercializing Si/perovskite tandem solar cells requires high-performing and cost-effective materials. The reliance on high-cost indium-based transparent conductive oxides (TCOs) for top electrodes poses a challenge for large-scale production. This necessitates the development of more cost-effective alternatives. This study investigates MoO<sub>x</sub>-Au-MoO<sub>x</sub> dielectric-metal-dielectric (DMD) trilayers as top transparent electrodes for 2-terminal monolithic Si/perovskite tandem solar cells. The DMD trilayers exhibited optoelectrical characteristics comparable to established TCO layers. When the thickness of the top MoO<sub>x</sub> layer was adjusted to 30, 40, and 50&#xa0;nm, the average light transmittance between 400 and 1100&#xa0;nm was 70.6%, 71.1%, and 69.7%, respectively. Corresponding average power conversion efficiencies (PCEs) of the Si/perovskite tandem solar cells were 12.46%, 14.10%, and 15.97%, respectively. The observed increase in PCE with the thicker MoO<sub>x</sub> layer was attributed to increased current density, resulting from enhanced light absorption by the Si subcell in the near-infrared region. The figure of merit (FOM) of the DMD trilayers ranged from 1.45 × 10<sup>− 3</sup> to 1.75 × 10<sup>− 3</sup> □/Ω. Photostability investigations performed on single-junction perovskite solar cells revealed that DMD trilayers improve the stability of devices in comparison to the conventional opaque gold electrodes. These findings indicate that MoO<sub>x</sub>-Au-MoO<sub>x</sub> DMD trilayers are a promising alternative to TCO layers for the top transparent electrodes in Si/perovskite tandem solar cells.</p>

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Utilizing MoOx-Au-MoOx trilayers as transparent top electrodes in 2-terminal monolithic Si/perovskite tandem solar cells

  • 期刊论文

  • 发表日期：

    2025年3月24日

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  • Assanali Sultanov,
  • Nursultan Mussakhanuly,
  • Aizhan Kusainova,
  • Hryhorii P. Parkhomenko,
  • Yerassyl Yerlanuly,
  • Kair Nussupov,
  • Annie Ng,
  • Nurzhan Beisenkhanov,
  • Askhat N. Jumabekov

摘要

Commercializing Si/perovskite tandem solar cells requires high-performing and cost-effective materials. The reliance on high-cost indium-based transparent conductive oxides (TCOs) for top electrodes poses a challenge for large-scale production. This necessitates the development of more cost-effective alternatives. This study investigates MoOx-Au-MoOx dielectric-metal-dielectric (DMD) trilayers as top transparent electrodes for 2-terminal monolithic Si/perovskite tandem solar cells. The DMD trilayers exhibited optoelectrical characteristics comparable to established TCO layers. When the thickness of the top MoOx layer was adjusted to 30, 40, and 50 nm, the average light transmittance between 400 and 1100 nm was 70.6%, 71.1%, and 69.7%, respectively. Corresponding average power conversion efficiencies (PCEs) of the Si/perovskite tandem solar cells were 12.46%, 14.10%, and 15.97%, respectively. The observed increase in PCE with the thicker MoOx layer was attributed to increased current density, resulting from enhanced light absorption by the Si subcell in the near-infrared region. The figure of merit (FOM) of the DMD trilayers ranged from 1.45 × 10− 3 to 1.75 × 10− 3 □/Ω. Photostability investigations performed on single-junction perovskite solar cells revealed that DMD trilayers improve the stability of devices in comparison to the conventional opaque gold electrodes. These findings indicate that MoOx-Au-MoOx DMD trilayers are a promising alternative to TCO layers for the top transparent electrodes in Si/perovskite tandem solar cells.