Probing the Diameter Limit of Single Walled Carbon Nanotubes in SWCNT: Fullerene Solar Cells

Moritz Pfohl, Konstantin Glaser, Arko Graf, Adrian Mertens, Daniel Tune, Tanja Puerckhauer, Asiful Alam, Li Wei, Yuan Chen, Jana Zaumseil, Alexander Colsmann, Ralph Krupke, Benjamin Flavel

    Research output: Contribution to journalArticlepeer-review

    45 Citations (Scopus)


    In this work, for the first time, the diameter limit of surfactant wrapped single walled carbon nanotubes (SWCNTs) in SWCNT:C60 solar cells is determined through preparation of monochiral small and large diameter nanotube devices as well as those from polychiral mixtures. Through assignment of the different nanotube chiralities by photoluminescence and optical density measurements a diameter limit yielding 0% internal quantum efficiency (IQE) is determined. This work provides insights into the required net driving energy for SWCNT exciton dissociation onto C60 and establishes a family of (n,m) species which can efficiently be utilized in polymer-free SWCNT:C60 solar cells. Using this approach the largest diameter nanotube with an IQE > 0% is found to be (8,6) with a diameter of 0.95 nm. Possible strategies to extend this diameter limit are then discussed.

    Original languageEnglish
    Article number1600890
    Pages (from-to)Art: 160089
    Number of pages11
    JournalAdvanced Energy Materials
    Issue number21
    Publication statusPublished - 9 Nov 2016


    • bandgap limit
    • near infrared (NIR)
    • photovoltaics
    • SWCNT
    • thin films


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