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Search: WFRF:(Watson James R.) > Linköping University

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  • Clarke, Andrew J., et al. (author)
  • Non-fullerene acceptor photostability and its impact on organic solar cell lifetime
  • 2021
  • In: Cell Reports Physical Science. - : Elsevier. - 2666-3864. ; 2:7
  • Journal article (peer-reviewed)abstract
    • The development of non-fullerene acceptors (NFAs) has facilitated the realization of efficient organic solar cells (OSCs) with minimal burn-in losses and excellent long-term stability. However, the role of NFA molecular structures on device stability remains unclear, limiting commercialization of NFA-based OSCs. Herein, the photostability of 10 OSC devices, fabricated with various NFAs (O-IDTBR, EH-IDTBR, ITIC, and ITIC-M) blended with donor polymers (PTB7-Th, PffBT4T-2OD, and PBDB-T), is investigated. O-IDTBR and EH-IDTBR form highly stable devices with all three polymers, whereas ITIC and ITIC-M devices suffer from burn-in losses and long-term degradation. Conformational instability is found to be responsible for the poor photostability of ITIC and ITIC-M, resulting in poor device stability. Twisting and potential breakage of the chemical bond that links the end group to the main backbone of ITIC and ITIC-M molecules causes undesirable conformational changes. Potential strategies to overcome such detrimental photo-induced conformational changes in NFAs are proposed.
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University
Linköping University  (2)Undo refine
Karolinska Institutet (1)
Language
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Medical and Health Sciences (1)

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