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What We have Learnt from PM6:Y6.

Safa Shoaee1,2, Hoang M Luong3, Jiage Song4

  • 1Optoelectronics of Disordered Semiconductors, Institute of Physics and Astronomy, University of Potsdam, D-14476, Potsdam-Golm, Germany.

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Recent progress in organic solar cells (OSCs) is driven by the Y6 non-fullerene acceptor. This review critically examines the PM6:Y6 combination, covering properties, performance, and commercialization potential for efficient and stable OSCs.

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Area of Science:

  • Materials Science
  • Photovoltaics
  • Organic Electronics

Background:

  • Organic solar cells (OSCs) have seen significant advancements.
  • The development of small molecule non-fullerene acceptors (NFAs), particularly Y6, has been a key driver.
  • The PM6:Y6 material combination has emerged as a highly promising system.

Purpose of the Study:

  • To critically review the structural and physical properties of the PM6:Y6 material combination.
  • To discuss the relationship between these properties and photovoltaic performance.
  • To provide a comprehensive understanding of PM6:Y6 for future organic solar cell development.

Main Methods:

  • Literature review and critical analysis of existing research.
  • Discussion of design principles for PM6 and Y6.
  • Examination of charge transfer, transport, and recombination mechanisms.
  • Analysis of blend morphology and degradation pathways.

Main Results:

  • The review details the design principles of PM6 and Y6, focusing on charge dynamics.
  • It explores blend morphology, degradation mechanisms, and commercialization aspects.
  • Key unresolved issues like blend energetics and the role of triplet states are discussed.

Conclusions:

  • The PM6:Y6 system shows significant potential for high-efficiency and stable organic solar cells.
  • Addressing current challenges in energetics, charge generation, and recombination is crucial for further progress.
  • This review consolidates knowledge and highlights future research directions for PM6:Y6 in OSCs.