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.

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: 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, 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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