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Pattern-Induced Directional Shear Force Synergized With Regulation of Multicomponent Fragments Entropy Effect for

Zetong Wang1, Houdong Mao1, Jiayou Zhang1

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Summary
This summary is machine-generated.

Researchers developed a new method for printable all-polymer solar cells (all-PSCs) using patterned blade-coating. This technique improves polymer chain arrangement, leading to higher efficiency and enabling commercialization of flexible solar modules.

Keywords:
directional sheardual‐fiber network morphologyflexible modulespatterned blade‐coatingpseudo‐planar heterojunction

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Renewable Energy

Background:

  • Printable all-polymer solar cells (all-PSCs) face challenges in achieving optimal polymer chain arrangement due to weak shear forces during blade-coating.
  • This limitation hinders the formation of a dual-fiber network morphology essential for efficient charge transport in the active layer.

Purpose of the Study:

  • To develop a synergistic strategy combining patterned blade-coating and multicomponent fragmental entropy modulation.
  • To construct pseudo-planar heterojunction (PPHJ) all-PSCs with an ideal vertical gradient distribution for enhanced performance.

Main Methods:

  • Utilized patterned blades to confine polymer fluid extrusion, enhancing directional shear and polymer chain stretching during printing.
  • Introduced PTQ10 to favorably orient and bind with PM6 fragments, suppressing entropy-driven retraction and aggregation.
  • Achieved favorable phase separation for PPHJ structure formation.

Main Results:

  • The PM6:PTQ10/PY-DT system achieved a power conversion efficiency (PCE) of 19.78% with a fill factor near 80%.
  • A 16.94 cm2 flexible module demonstrated a PCE of 16.08%.
  • Demonstrated that directional fluid force guidance and ordered polymer fragment stacking are critical for dual-fiber morphology.

Conclusions:

  • The developed synergistic strategy effectively guides polymer chain arrangement and promotes ordered stacking.
  • This approach provides a reliable pathway for the commercialization of high-performance all-PSCs.
  • Highlights the importance of controlling morphology at the nanoscale for efficient organic solar cell devices.