Energy Level Alignment and Sub-Bandgap Charge Generation in Polymer:Fullerene Bulk Heterojunction Solar Cells (Adv. Mater. 17/2013)

Authors

  • Sai-Wing Tsang,

    1. Department of Materials Science and Engineering, University of Florida, Gainesville, FL, 32611, USA
    Current affiliation:
    1. These authors contributed equally to this paper.
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  • Song Chen,

    1. Department of Materials Science and Engineering, University of Florida, Gainesville, FL, 32611, USA
    Current affiliation:
    1. These authors contributed equally to this paper.
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  • Franky So

    Corresponding author
    1. Department of Materials Science and Engineering, University of Florida, Gainesville, FL, 32611, USA
    • Department of Materials Science and Engineering, University of Florida, Gainesville, FL, 32611, USA.
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Abstract

original image

A novel technique – charge modulated electro-absorption spectroscopy (CEMAS) – is reported by Franky So and co-workers on page 2434 and used to determine the energy-level alignment and the effective bandgap of organic heterojunctions. What makes CMEAS unique is that it can directly determine the interface energetics of donor–acceptor blends, not possible using conventional electro-chemical methods.

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