Organic Salts as a Route to Energy Level Control in Low Bandgap, High Open-Circuit Voltage Organic and Transparent Solar Cells that Approach the Excitonic Voltage Limit

John Suddard-Bangsund, Christopher J. Traverse, Margaret Young, Tyler J. Patrick, Yimu Zhao, Richard R. Lunt

    Research output: Research - peer-reviewArticle

    • 4 Citations

    Abstract

    A new series of organic salts with selective near-infrared (NIR) harvesting to 950 nm is reported, and anion selection and blending is demonstrated to allow for fine tuning of the open-circuit voltage. Extending photoresponse deeper into the NIR is a significant challenge facing small molecule organic photovoltaics, and recent demonstrations have been limited by open-circuit voltages much lower than the theoretical and practical limits. This work presents molecular design strategies that enable facile tuning of energy level alignment and open-circuit voltages in organic salt-based photovoltaics. Anions are also shown to have a strong influence on exciton diffusion length. These insights provide a clear route toward achieving high efficiency transparent and panchromatic photovoltaics, and open up design opportunities to rapidly tailor molecules for new donor-acceptor systems.

    LanguageEnglish (US)
    Article number1501659
    JournalAdvanced Energy Materials
    Volume6
    Issue number1
    DOIs
    StatePublished - Jan 7 2016

    Profile

    Level control
    Open circuit voltage
    Power control
    Electron energy levels
    Solar cells
    Energy gap
    Salts
    Electric potential
    Anions
    Tuning
    Infrared radiation
    Molecules
    Negative ions
    Demonstrations
    LDS 751
    Excitons

    Keywords

    • energy level tuning
    • near-infrared solar harvesting
    • open-circuit voltage
    • organic salts
    • transparent solar cells

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment
    • Materials Science(all)

    Cite this

    Organic Salts as a Route to Energy Level Control in Low Bandgap, High Open-Circuit Voltage Organic and Transparent Solar Cells that Approach the Excitonic Voltage Limit. / Suddard-Bangsund, John; Traverse, Christopher J.; Young, Margaret; Patrick, Tyler J.; Zhao, Yimu; Lunt, Richard R.

    In: Advanced Energy Materials, Vol. 6, No. 1, 1501659, 07.01.2016.

    Research output: Research - peer-reviewArticle

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    AU - Traverse,Christopher J.

    AU - Young,Margaret

    AU - Patrick,Tyler J.

    AU - Zhao,Yimu

    AU - Lunt,Richard R.

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