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    Controlling Long-Lived Triplet Generation from Intramolecular Singlet Fission in the Solid State

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    Type
    Article
    Authors
    Pace, Natalie A.
    Zhang, Weimin
    Arias, Dylan H.
    McCulloch, Iain cc
    Rumbles, Garry cc
    Johnson, Justin C.
    KAUST Department
    Chemical Science Program
    KAUST Solar Center (KSC)
    Physical Science and Engineering (PSE) Division
    Date
    2017-12-06
    Online Publication Date
    2017-12-06
    Print Publication Date
    2017-12-21
    Permanent link to this record
    http://hdl.handle.net/10754/626317
    
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    Abstract
    The conjugated polymer poly(benzothiophene dioxide) (PBTDO1) has recently been shown to exhibit efficient intramolecular singlet fission in solution. In this paper, we investigate the role of intermolecular interactions in triplet separation dynamics after singlet fission. We use transient absorption spectroscopy to determine the singlet fission rate and triplet yield in two polymers differing only by side chain motif in both solution and the solid state. Whereas solid-state films show singlet fission rates identical to those measured in solution, the average lifetime of the triplet population increases dramatically, and is strongly dependent on side-chain identity. These results show that it may be necessary to carefully engineer the solid-state microstructure of these “singlet fission polymers” in order to produce the long-lived triplets needed to realize efficient photovoltaic devices.
    Citation
    Pace NA, Zhang W, Arias DH, McCulloch I, Rumbles G, et al. (2017) Controlling Long-Lived Triplet Generation from Intramolecular Singlet Fission in the Solid State. The Journal of Physical Chemistry Letters: 6086–6091. Available: http://dx.doi.org/10.1021/acs.jpclett.7b02750.
    Publisher
    American Chemical Society (ACS)
    Journal
    The Journal of Physical Chemistry Letters
    DOI
    10.1021/acs.jpclett.7b02750
    PubMed ID
    29190427
    Additional Links
    http://pubs.acs.org/doi/10.1021/acs.jpclett.7b02750
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.jpclett.7b02750
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Solar Center (KSC)

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