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

Richard R. Lunt, Vladimir Bulovic

    Research output: Chapter in Book/Report/Conference proceedingConference 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.

    Original languageEnglish (US)
    Title of host publication11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings
    StatePublished - 2011
    Event2011 AIChE Annual Meeting, 11AIChE - Minneapolis, MN, United States

    Other

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

    Profile

    Biological Availability
    Infrared radiation
    Fusobacterium
    Solar cells
    Acyclic Acids
    Transparency
    Edema Disease of Swine
    Coal Mining
    Light interference
    Blood Flow Velocity
    Scavenging
    Transaminases
    Ascorbic Acid
    Conversion efficiency
    Automobiles
    Heterojunctions
    Energy utilization
    Fluxes
    Tall buildings
    Electronic equipment

    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: Chapter in Book/Report/Conference proceedingConference 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, 16-21 October.
    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.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

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