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Interfacial Energetics Reconstruction via Bridging Engineering for Efficient Inverted Perovskite Solar Cells and

Zhijun Li1, Ke Wang2, Ru Li1

  • 1Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing, China.

Angewandte Chemie (International Ed. in English)
|April 14, 2026
PubMed
Summary
This summary is machine-generated.

Nitromethyl phenyl sulfone (NMePS) enhances perovskite solar cell performance by optimizing the perovskite/C60 interface. This reduces energy losses, boosting efficiency and stability for scalable solar modules.

Keywords:
energetic reconstructionenergy lossperovskite solar cellsperovskite/C60 interfaceπ–π interactions

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Device Physics

Background:

  • Perovskite solar cells (PSCs) face performance and stability limitations due to energy losses at the perovskite/C60 interface.
  • Suboptimal interfacial contact causes energetic mismatches, restricting charge transport and device longevity.

Purpose of the Study:

  • To introduce nitromethyl phenyl sulfone (NMePS) as an interfacial modifier for inverted PSCs.
  • To comprehensively optimize interfacial states and minimize energy losses at the perovskite/C60 interface.

Main Methods:

  • Utilizing NMePS to bridge the perovskite and C60 layers, reducing trap state density and improving film morphology.
  • Employing NMePS to promote uniform dispersion and compact stacking of the C60 electron transport layer (ETL) via π-π interactions.
  • Tailoring electronic properties at the interface for favorable energy alignment and optimized charge transport.

Main Results:

  • NMePS modification significantly reduced trap state density and improved perovskite film morphology.
  • Enhanced C60 ETL dispersion and stacking, leading to suppressed non-radiative recombination.
  • Achieved high power conversion efficiencies: 26.87% (small area) and 25.06% (large area).
  • Demonstrated exceptional stability: T90 > 2600 h (long-term), T80 > 500 h (thermal), T90 > 1200 h (MPPT).
  • A 655.2 cm2 solar module achieved 19.28% efficiency.

Conclusions:

  • NMePS effectively reconstructs the perovskite/C60 interface, suppressing recombination and improving device performance.
  • The modified interface leads to superior energy alignment and charge dynamics.
  • NMePS shows significant potential for up-scaling PSC technology with enhanced efficiency and stability.