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<p>The paper presents a new nanostructure merging plasmonic palladium (Pd) the nanostructure with perovskite solar cells (PSCs) in order to achieve a combined enhancement of the optical capture rates alongside charge and heat transfer. The Pd nanorods integrated into the perovskite-electron transport layer interface show a strong localized surface plasmon resonance (LSPR) at 780&#xa0;nm and the optical absorption at this wavelength was integrated to give a strong increase in 17% relative to controls. Transient absorption spectroscopy studies and time-resolved photoluminescence show that Pd-nanorod optical devices exhibit higher carrier-hot carrier injection and longer carrier cooling periods of ~ 200&#xa0;fs, which allows enhanced extraction of charges. Electrochemical impedance spectroscopy shows significant series resistance changes (Rs reduced 5.0 to 3.2 Ω•cm<sup>2</sup>) and 18 change in electron mobility (from 1.91 × 10<sup>−3</sup> reduced to 2.25 × 10<sup>−3</sup> cm<sup>2</sup>/V. s) that are combined by both efficient interfaces passivation of thiol ligands and optimal band placement. Photovoltaic characterization also indicates an increase in power conversion efficiency (PCE) of 17.3% (control) to 20.3% (Pd-nanorods) and strong performance with over 90% of original PCE observed after 1000&#xa0;h at 85%. Local heating can also be reduced by approximately 30% using hexagonal boron nitride thermal spreaders with no loss in plasmonic advantage. This combination approach that considers plasmonic nanostructures, chemical passivation, and thermal regulation is an appealing approach to high-efficiency and long-lasting PSCs at scale.</p>

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Hot-Carrier-Driven Light–Heat Synergy in Perovskite–Pd Nanoheterostructures for Integrated Photothermal–Photovoltaic Applications

  • 期刊论文

  • 发表日期：

    2025年10月14日

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  • Nakka Phani Kumar,
  • Srihari K.,
  • Karthik S.

摘要

The paper presents a new nanostructure merging plasmonic palladium (Pd) the nanostructure with perovskite solar cells (PSCs) in order to achieve a combined enhancement of the optical capture rates alongside charge and heat transfer. The Pd nanorods integrated into the perovskite-electron transport layer interface show a strong localized surface plasmon resonance (LSPR) at 780 nm and the optical absorption at this wavelength was integrated to give a strong increase in 17% relative to controls. Transient absorption spectroscopy studies and time-resolved photoluminescence show that Pd-nanorod optical devices exhibit higher carrier-hot carrier injection and longer carrier cooling periods of ~ 200 fs, which allows enhanced extraction of charges. Electrochemical impedance spectroscopy shows significant series resistance changes (Rs reduced 5.0 to 3.2 Ω•cm2) and 18 change in electron mobility (from 1.91 × 10−3 reduced to 2.25 × 10−3 cm2/V. s) that are combined by both efficient interfaces passivation of thiol ligands and optimal band placement. Photovoltaic characterization also indicates an increase in power conversion efficiency (PCE) of 17.3% (control) to 20.3% (Pd-nanorods) and strong performance with over 90% of original PCE observed after 1000 h at 85%. Local heating can also be reduced by approximately 30% using hexagonal boron nitride thermal spreaders with no loss in plasmonic advantage. This combination approach that considers plasmonic nanostructures, chemical passivation, and thermal regulation is an appealing approach to high-efficiency and long-lasting PSCs at scale.