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Dye-sensitized solar cells for efficient power generation under ambient lighting
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry. École Polytechnique Fédérale de Lausanne .
École Polytechnique Fédérale de Lausanne .
École Polytechnique Fédérale de Lausanne .
East China Univ Sci & Technol.
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2017 (English)In: Nature Photonics, ISSN 1749-4885, E-ISSN 1749-4893, Vol. 11, no 6, p. 372-+Article in journal (Refereed) Published
Abstract [en]

Solar cells that operate efficiently under indoor lighting are of great practical interest as they can serve as electric power sources for portable electronics and devices for wireless sensor networks or the Internet of Things. Here, we demonstrate a dye-sensitized solar cell (DSC) that achieves very high power-conversion efficiencies (PCEs) under ambient light conditions. Our photosystem combines two judiciously designed sensitizers, coded D35 and XY1, with the copper complex Cu(II/I)(tmby) as a redox shuttle (tmby, 4,4', 6,6'-tetramethyl-2,2'-bipyridine), and features a high open-circuit photovoltage of 1.1 V. The DSC achieves an external quantum efficiency for photocurrent generation that exceeds 90% across the whole visible domain from 400 to 650 nm, and achieves power outputs of 15.6 and 88.5 mu W cm(-2) at 200 and 1,000 lux, respectively, under illumination from a model Osram 930 warm-white fluorescent light tube. This translates into a PCE of 28.9%.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2017. Vol. 11, no 6, p. 372-+
National Category
Atom and Molecular Physics and Optics
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URN: urn:nbn:se:uu:diva-327139DOI: 10.1038/NPHOTON.2017.60ISI: 000402602500013OAI: oai:DiVA.org:uu-327139DiVA, id: diva2:1136575
Available from: 2017-08-28 Created: 2017-08-28 Last updated: 2017-08-28Bibliographically approved

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