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Updated: Oct 9, 2025

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Meniscus-Assisted Coating with Optimized Active-Layer Morphology toward Highly Efficient All-Polymer Solar Cells.

Yuchen Yue1,2, Bing Zheng3, Wenjie Yang1,2

  • 1CAS Key Laboratory of Bioinspired Smart Interfacial Science Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|December 21, 2021
PubMed
Summary

A new meniscus-assisted coating (MAC) method enhances polymer solar cell (all-PSC) efficiency over 15% by controlling film morphology. This technique improves crystallinity and stability for printable solar cells.

Keywords:
active-layer morphologyall-polymer solar cellscrystallinitymeniscus assisted coatingprinting technique

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Area of Science:

  • Materials Science
  • Renewable Energy

Background:

  • Morphology control is crucial for efficient solution-processed solar cells.
  • All-polymer solar cells (all-PSCs) are a promising photovoltaic technology.

Purpose of the Study:

  • To develop a facile and effective meniscus-assisted coating (MAC) strategy for high-quality all-PSC blend films.
  • To enhance the crystallinity and interpenetrating nanofiber network morphology in all-PSCs.

Main Methods:

  • Utilized meniscus-assisted coating (MAC) for fabricating all-PSC blend films.
  • Investigated crystallization kinetics using in situ UV-vis absorption spectroscopy.
  • Applied MAC strategy to multiple binary systems for device fabrication.

Main Results:

  • Achieved all-PSC efficiencies exceeding 15% with MAC, the best for solution-printing-based devices.
  • Demonstrated a linear relationship between meniscus advance speed and polymer blend film crystallinity.
  • Fabricated 1 cm² all-PSC devices with efficiencies over 12% using the MAC strategy.

Conclusions:

  • The MAC strategy enables precise control over blend film morphology and crystallinity.
  • MAC is a promising approach for fabricating high-efficiency and stable all-polymer solar cells.
  • The technique shows compatibility and universality across different binary systems.