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<p>This study examines ultrafast carrier dynamics in monolayer MoS₂ and WSe₂ films boosted by plasmonic nanostructures for the pursuit of solar-powered wearable optoelectronics. We integrate gold and silver nanodisks into these TMDs and GaN substrates to examine plasmon–exciton–phonon coupling through theoretical modeling, first-principles simulations, and experimental confirmation. The coupled oscillator model demonstrates Rabi splitting energies of up to ~ 95&#xa0;meV, validating strong exciton–plasmon coupling. UV–Vis spectroscopy and TEM verify DNA-directed dimer assembly of gold nanoparticles with sub-3&#xa0;nm nanogaps that are crucial for quantized SERS enhancement. Photoluminescence intensity was boosted by ~ 4.5 × (MoS₂) and ~ 6.2 × (WSe₂), whereas time-resolved PL measurements indicate shorter exciton lifetimes as a result of Purcell-enhanced radiative recombination. Simulations forecast up to 40% enhancement in carrier extraction efficiency, confirming the synergistic role of LSPR and excitonic response. This research shows a scalable, tunable approach to enhancing light–matter interactions in atomically thin materials and opens the door to flexible, low-power devices in photonics, biosensing, and wearable solar applications.</p>

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Ultrafast Carrier Dynamics in Plasmonic-Enhanced Perovskite Thin Films for Next-Gen Solar-Powered Wearables

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • Aman Sharma,
  • N. Nagabhooshanam,
  • Rintu Kumar,
  • Mamata Chahar,
  • T. Sudhakar,
  • N. B. C. S. N. Murthy,
  • A. Rajaram

摘要

This study examines ultrafast carrier dynamics in monolayer MoS₂ and WSe₂ films boosted by plasmonic nanostructures for the pursuit of solar-powered wearable optoelectronics. We integrate gold and silver nanodisks into these TMDs and GaN substrates to examine plasmon–exciton–phonon coupling through theoretical modeling, first-principles simulations, and experimental confirmation. The coupled oscillator model demonstrates Rabi splitting energies of up to ~ 95 meV, validating strong exciton–plasmon coupling. UV–Vis spectroscopy and TEM verify DNA-directed dimer assembly of gold nanoparticles with sub-3 nm nanogaps that are crucial for quantized SERS enhancement. Photoluminescence intensity was boosted by ~ 4.5 × (MoS₂) and ~ 6.2 × (WSe₂), whereas time-resolved PL measurements indicate shorter exciton lifetimes as a result of Purcell-enhanced radiative recombination. Simulations forecast up to 40% enhancement in carrier extraction efficiency, confirming the synergistic role of LSPR and excitonic response. This research shows a scalable, tunable approach to enhancing light–matter interactions in atomically thin materials and opens the door to flexible, low-power devices in photonics, biosensing, and wearable solar applications.