Transparent, near-infrared organic photovoltaic solar cells for window and energy-scavenging applications

Richard R. Lunt, Vladimir Bulovic

    Research output: ResearchConference contribution

    Abstract

    Building integrated photovoltaic technologies are an enticing route to capturing large areas of solar flux necessary to offset a significant portion of our non-renewable energy consumption. In this work we explore a route to high-efficiency and high-transparency solar cells that can be integrated onto window panes in homes, skyscrapers, and automobiles to enhance the functionality of already utilized transparent surfaces. We exploit spectrally-discrete excitonic features of molecular photoactive layers to position the solar cell absorption in the near-infrared (NIR), leaving the visible part of the spectrum largely unaffected. By optimizing the near-infrared optical interference generated within the transparent ITO contacts, we demonstrate planar heterojunctions with power conversion efficiencies of 1.3±0.1% and simultaneous average transmission across the visible spectrum of > 65%. This selective photoactivity in the NIR also allowed us to further optimize the architecture with the use of a transparent NIR reflector, resulting in an efficiency of 1.7±0.1%, approaching the 2.4±0.2% efficiency of the opaque control cell while maintaining high average visible transparency of > 55%. Finally we demonstrate a useful application of this technology, whereby a series of the transparent cells are monolithically integrated to power small electronic components with low-light levels. This transparent photovoltaic architecture suggests new strategies for high-efficiency power generating windows, and highlights an application benefiting from excitonic electronics.

    LanguageEnglish (US)
    Title of host publication11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings
    StatePublished - 2011
    Event2011 AIChE Annual Meeting, 11AIChE - Minneapolis, MN, United States
    Duration: Oct 16 2011Oct 21 2011

    Other

    Other2011 AIChE Annual Meeting, 11AIChE
    CountryUnited States
    CityMinneapolis, MN
    Period10/16/1110/21/11

    Profile

    Scavenging
    Solar cells
    Infrared radiation
    Transparency
    Light interference
    Tall buildings
    Conversion efficiency
    Automobiles
    Heterojunctions
    Electronic equipment
    Energy utilization
    Fluxes

    ASJC Scopus subject areas

    • Chemical Engineering(all)

    Cite this

    Lunt, R. R., & Bulovic, V. (2011). Transparent, near-infrared organic photovoltaic solar cells for window and energy-scavenging applications. In 11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings

    Transparent, near-infrared organic photovoltaic solar cells for window and energy-scavenging applications. / Lunt, Richard R.; Bulovic, Vladimir.

    11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings. 2011.

    Research output: ResearchConference contribution

    Lunt, RR & Bulovic, V 2011, Transparent, near-infrared organic photovoltaic solar cells for window and energy-scavenging applications. in 11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings. 2011 AIChE Annual Meeting, 11AIChE, Minneapolis, MN, United States, 10/16/11.
    Lunt RR, Bulovic V. Transparent, near-infrared organic photovoltaic solar cells for window and energy-scavenging applications. In 11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings. 2011.
    Lunt, Richard R. ; Bulovic, Vladimir. / Transparent, near-infrared organic photovoltaic solar cells for window and energy-scavenging applications. 11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings. 2011.
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