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Researchers developed all-polymer solar cells (All-PSCs) using toluene, achieving 17.0% efficiency. This sequential processing (SqP) method in toluene reduces recombination and enhances mobility for better device performance.

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Polymer Chemistry

Background:

  • All-polymer solar cells (All-PSCs) utilize polymeric electron donors and acceptors.
  • High-efficiency All-PSCs are typically processed using chloroform.
  • Developing efficient processing methods with alternative solvents is crucial for scalability.

Purpose of the Study:

  • To investigate the feasibility of fabricating high-efficiency All-PSCs using toluene via sequential processing (SqP).
  • To analyze the impact of toluene-based SqP on film morphology, charge transport, and device performance.

Main Methods:

  • Fabrication of All-PSCs using the sequential processing (SqP) method with toluene as the solvent.
  • Performance characterization of the fabricated solar cells.
  • Analysis of film properties and charge carrier dynamics.

Main Results:

  • Achieved power conversion efficiencies (PCEs) up to 17.0% for All-PSCs processed with toluene using SqP.
  • Demonstrated reduced carrier recombination in devices processed with toluene.
  • Observed enhanced carrier mobility and improved fill factor in toluene-processed devices.

Conclusions:

  • Sequential processing (SqP) with toluene is a viable and effective method for fabricating high-efficiency All-PSCs.
  • Toluene-based processing offers a promising alternative to chloroform, potentially enabling more sustainable and scalable production of All-PSCs.
  • The improved device performance is attributed to reduced carrier recombination and enhanced charge transport properties.