Non-fullerene Acceptors for Harvesting Excitons from Semiconducting Carbon Nanotubes

Semiconducting single-walled carbon nanotubes (s-SWCNTs) are promising materials for solar energy conversion and photodetectors. Fullerenes and their derivatives, being widely employed as electron acceptors in s-SWCNT photovoltaic devices, effectively dissociate s-SWCNT excitons by forming heterojunctions with favorable energetic offsets. However, their limited tunability and poor co-processability with s-SWCNTs in blends have been major obstacles for further improving the device performance. Here, we investigate the exciton dissociating capability of a series of non-fullerene acceptors (NFAs) based on indacenodithiophene and perylene diimides, by measuring internal quantum efficiency (QE) for exciton dissociation and electron transfer in bilayer s-SWCNT/NFA devices. A maximum internal QE of ∼50% is achieved with a (6,5) s-SWCNT/indacenodithiophene-based acceptor heterojunction. Our results indicate that non-fullerene acceptors with deeper electron affinities could potentially replace traditional fulleren...

• Publication year

  2019

• Venue

  Journal of Physical Chemistry C

• Publication date

  2019-08-09

• Fields of study

  Materials Science, Physics

• Identifiers
  DOI 10.1021/ACS.JPCC.9B06381
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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