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Related Experiment Video

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Dual-functional Interface Engineering with Picolinamide for Improved MAPbI3-xClx Perovskite Solar Cells.

Yuncheng Deng1, Chaoting Wang1, Yumei Chen1

  • 1College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, China.

The Journal of Physical Chemistry Letters
|February 19, 2026
PubMed
Summary

Picolinamide (PA) enhances perovskite solar cell performance by reducing defects and improving stability. PA-modified cells show a 23% efficiency boost and maintain over 80% performance after extended testing.

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Perovskite solar cells (PSCs) face challenges like high defect density and energy-level misalignment.
  • These issues cause nonradiative recombination and limit charge extraction efficiency in MAPbI3-xClx PSCs.

Purpose of the Study:

  • To investigate picolinamide (PA) as an interfacial modifier for MAPbI3-xClx perovskite films.
  • To enhance the properties and photovoltaic performance of perovskite solar cells using PA.

Main Methods:

  • Introduced picolinamide (PA) as an ultrathin interlayer in inverted PSCs.
  • Utilized PA's pyridine nitrogen and amide groups to passivate defects and optimize energy-level alignment.
  • Assessed film hydrophobicity, ion migration, and moisture penetration.

Main Results:

  • PA modification led to a champion power conversion efficiency (PCE) of 19.35%, a 23.01% improvement over control devices.
  • Enhanced film hydrophobicity, reducing ion migration and moisture ingress.
  • Unencapsulated devices retained over 80% of initial PCE after 180 days (N2) and 360 hours (ambient).

Conclusions:

  • Picolinamide is a promising interfacial modifier for perovskite solar cells.
  • PA effectively passivates defects, optimizes energy levels, and enhances device stability.
  • This strategy offers a pathway to highly efficient and durable perovskite photovoltaics.