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Non-fullerene acceptor photostability and its impact on organic solar cell lifetime

Clarke, Andrew J. (author)
Swansea Univ, Wales
Luke, Joel (author)
Imperial Coll London, England; Imperial Coll London, England
Meitzner, Rico (author)
Friedrich Schiller Univ Jena, Germany
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Wu, Jiaying (author)
Imperial Coll London, England; Imperial Coll London, England
Wang, Yuming (author)
Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
Lee, Harrison K. H. (author)
Swansea Univ, Wales
Speller, Emily M. (author)
Swansea Univ, Wales
Bristow, Helen (author)
Univ Oxford, England
Cha, Hyojung (author)
Imperial Coll London, England; Imperial Coll London, England
Newman, Michael J. (author)
Swansea Univ, Wales
Hooper, Katherine (author)
Swansea Univ, Wales
Evans, Alex (author)
Cardiff Univ, Wales
Gao, Feng (author)
Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
Hoppe, Harald (author)
Friedrich Schiller Univ Jena, Germany
McCulloch, Iain (author)
Univ Oxford, England; King Abdullah Univ Sci & Technol KAUST, Saudi Arabia
Schubert, Ulrich S. (author)
Friedrich Schiller Univ Jena, Germany; Friedrich Schiller Univ Jena, Germany
Watson, Trystan M. (author)
Swansea Univ, Wales
Durrant, James R. (author)
Swansea Univ, Wales; Imperial Coll London, England; Imperial Coll London, England
Tsoi, Wing C. (author)
Swansea Univ, Wales
Kim, Ji-Seon (author)
Imperial Coll London, England; Imperial Coll London, England
Li, Zhe (author)
Queen Mary Univ London, England
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 (creator_code:org_t)
Elsevier, 2021
2021
English.
In: Cell Reports Physical Science. - : Elsevier. - 2666-3864. ; 2:7
Related links:
https://liu.diva-por... (primary) (Raw object)
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https://doi.org/10.1...
https://urn.kb.se/re...
https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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.

Subject headings

NATURVETENSKAP  -- Kemi -- Polymerkemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Polymer Chemistry (hsv//eng)

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