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Related Experiment Video

Updated: Sep 5, 2025

Morphology Control for Fully Printable Organic&#8211;Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
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Recent Advances in Nonfullerene Acceptor-Based Layer-by-Layer Organic Solar Cells Using a Solution Process.

Min Hun Jee1, Hwa Sook Ryu1, Dongmin Lee2

  • 1Department of Chemistry, KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|July 6, 2022
PubMed
Summary

Sequential layer-by-layer organic solar cells (OSCs) show promise for efficient energy conversion. This review highlights strategies for optimizing phase separation and discusses advancements in large-area production and stability for commercialization.

Keywords:
layer-by-layernonfullerene acceptorsorganic photovoltaicspseudo-planar heterojunction

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Renewable Energy

Background:

  • Organic solar cells (OSCs) are gaining attention for their potential in renewable energy.
  • Sequential layer-by-layer (LbL) fabrication offers advantages for OSCs, including efficient charge transport and scalability.
  • Nonfullerene acceptors (NFAs) have enabled high power conversion efficiencies (PCEs) exceeding 18% in LbL OSCs.

Purpose of the Study:

  • To review recent advancements in achieving ideal vertical donor/acceptor (D/A) phase separation in NFA-based LbL OSCs.
  • To discuss the impact of exciton diffusion length on LbL OSC performance.
  • To examine large-area device production, stability, and future commercialization prospects of LbL OSCs.

Main Methods:

  • Summarizing studies on solvent selection, processing additives, protecting solvent treatment, and ternary blends for optimized phase separation.
  • Analyzing the role of exciton diffusion length in NFA-based LbL OSCs.
  • Reviewing large-area fabrication techniques and stability assessments (thermal and mechanical).

Main Results:

  • Various strategies effectively control vertical D/A phase separation in NFA-based LbL OSCs.
  • Longer exciton diffusion lengths in NFAs offer new avenues for performance enhancement.
  • LbL techniques show potential for large-area production, with ongoing research into device stability.

Conclusions:

  • Optimizing phase separation and leveraging NFA properties are key to high-performance LbL OSCs.
  • LbL fabrication is a viable route for scalable OSC production.
  • Addressing stability challenges is crucial for the commercialization of LbL OSC technology.