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A Water-Processed Mesoscale Structure Enables 18.5% Efficient Binary Layer-by-Layer Organic Solar Cells.

Chen Xie1, Hui Huang1, Zijian Li1

  • 1College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China.

Polymers
|January 11, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces an eco-friendly, water-based nanoparticle ink for fabricating high-performance organic solar cells (OSCs) using a layer-by-layer (LBL) method. The new approach enhances efficiency and addresses limitations of toxic solvents in OSC production.

Keywords:
eco-friendly water-processinglayer-by-layer processingnanoparticulate mesoscale structureorganic solar cells

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Area of Science:

  • Materials Science
  • Renewable Energy

Background:

  • Layer-by-layer (LBL) deposition is crucial for high-performance organic solar cells (OSCs) due to vertical phase separation.
  • Current LBL methods for OSCs face challenges with toxic solvents and intermixing issues, hindering commercialization.

Purpose of the Study:

  • To develop an eco-friendly, water-based nanoparticle (NP) ink for LBL OSCs.
  • To improve the performance and processability of LBL OSCs by controlling morphology.

Main Methods:

  • Fabrication of a mesoscale structure using a water-based donor polymer NP ink.
  • Infiltration of the mesoscale structure with an acceptor solution using non-halogen o-xylene.
  • Characterization of the resulting organic solar cells.

Main Results:

  • Achieved outstanding power conversion efficiencies of 18.5% for PM6:L8-BObased LBL OSCs.
  • Demonstrated enhanced charge carrier mobility and reduced trap states in the developed meso-LBL devices.
  • Optimized vertical morphology through the mesoscale structure.

Conclusions:

  • The water-based NP ink and mesoscale structure strategy offers a promising, eco-friendly alternative for LBL OSC fabrication.
  • Findings pave the way for industrial production of efficient and sustainable organic solar cells.
  • Reduced reliance on toxic solvents in OSC manufacturing.