Non-fullerene acceptor photostability and its impact on organic solar cell lifetime
- Clarke, Andrew J.
- Luke, Joel
- Meitzner, Rico
- Wu, Jiaying
- Wang, Yuming
- Lee, Harrison K. H.
- Speller, Emily M.
- Bristow, Helen
- Cha, Hyojung
- Newman, Michael J.
- Hooper, Katherine
- Evans, Alex
- Gao, Feng
- Hoppe, Harald
- McCulloch, Iain
- Schubert, Ulrich S.
- Watson, Trystan M.
- Durrant, James R.
- Tsoi, Wing C.
- Kim, Ji-Seon
- Li, Zhe
DOIAbstract
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 o...
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