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Updated: Jun 20, 2026

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
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Published on: January 10, 2017

Phenyl-Alkyl Inner Side Chain-Based Polymerized Small-Molecule Acceptor with Improved Miscibility and Crystallinity

Zheng Tao1, Qianbo Deng1, Dinglong Feng2

  • 1Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, P. R. China.

ACS Applied Materials & Interfaces
|June 18, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a new polymer acceptor (PY-HDB) for all-polymer solar cells (all-PSCs). This PY-HDB improves material blending and molecular stacking, leading to a high power conversion efficiency of 17.49% in all-PSCs.

Keywords:
all-polymer solar cellsmiscibilityphase-separated morphologyphenyl-alkyl inner side chainspolymerized small-molecule acceptors

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Photovoltaics

Background:

  • All-polymer solar cells (all-PSCs) show promise for practical applications but lag behind small-molecule acceptor devices.
  • Key challenges include achieving optimal donor-acceptor miscibility and molecular ordering within the active layer.

Purpose of the Study:

  • To design and synthesize a novel polymerized small-molecule acceptor, PY-HDB, with specific side-chain engineering.
  • To investigate the impact of PY-HDB's phenyl-alkyl side chains on miscibility, molecular ordering, and nanoscale morphology in all-PSC active layers.
  • To evaluate the photovoltaic performance of all-PSCs incorporating the PY-HDB acceptor.

Main Methods:

  • Synthesis of PY-HDB with phenyl-alkyl inner side chains and comparison with PY-HD (conventional alkyl chains).
  • Fabrication and characterization of all-polymer solar cell devices using the D18 polymer donor and PY-HDB acceptor.
  • Analysis of π-π stacking, miscibility, and nanoscale phase-separated morphology in the D18:PY-HDB blend.

Main Results:

  • PY-HDB demonstrated tighter π-π stacking and improved miscibility with the D18 polymer donor compared to PY-HD.
  • A favorable nanoscale phase-separated morphology was observed in the D18:PY-HDB blend.
  • The resulting all-polymer solar cell achieved a power conversion efficiency (PCE) of 17.49% and a fill factor of 75.46%.

Conclusions:

  • The phenyl-alkyl side chain design in PY-HDB is a promising strategy for enhancing polymer acceptor performance.
  • Optimized miscibility and molecular ordering through side-chain engineering can significantly boost all-PSC efficiency.
  • This work offers a viable pathway for developing high-performance polymer acceptors for next-generation solar cells.