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Related Experiment Video

Updated: May 29, 2025

Printing Fabrication of Bulk Heterojunction Solar Cells and In Situ Morphology Characterization
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Manipulating Aggregation Kinetics toward Efficient All-Printed Organic Solar Cells.

Junzhen Ren1,2, Jianqiu Wang1, Jiawei Qiao3

  • 1State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

Advanced Materials (Deerfield Beach, Fla.)
|February 5, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a new non-fullerene acceptor, BTP-Cy, with cyclohexyl side chains to improve organic solar cell (OSC) printing. This molecular design enhances film formation, boosting power conversion efficiencies (PCEs) for printed OSCs.

Keywords:
blade coatingcyclohexylmolecular designmorphology controlorganic solar cells

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Photovoltaics

Background:

  • All-printed organic solar cells (OSCs) show lower power conversion efficiencies (PCEs) compared to spin-coated devices.
  • Morphological variations in the bulk heterojunction layer are a key limitation in printed OSCs.

Purpose of the Study:

  • To introduce cyclohexyl side chains in a non-fullerene acceptor (BTP-Cy) to control molecular aggregation and film formation during printing.
  • To enhance the performance of all-printed OSCs through molecular design.

Main Methods:

  • Synthesis of a novel non-fullerene acceptor, BTP-Cy, incorporating cyclohexyl side chains.
  • Fabrication of OSCs using spin-coating and blade-coating techniques with the new material.
  • Characterization of molecular aggregation, film morphology, and photovoltaic performance.

Main Results:

  • BTP-Cy demonstrated enhanced intermolecular π-π stacking, optimal solution aggregation, and favorable phase separation.
  • PB3:FTCC-Br:BTP-Cy based OSCs achieved PCEs of 20.2% (spin-coated) and 19.5% (blade-coated).
  • A 23.6 cm² module reached an efficiency of 16.7%.

Conclusions:

  • Cyclohexyl side chains effectively modulate film formation kinetics in printed OSCs.
  • Molecular design of non-fullerene acceptors is a viable strategy to improve the efficiency of all-printed OSCs.
  • This work provides a new approach for developing high-performance printed organic solar cells.