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Dye-sensitized solar cells for efficient power generation under ambient lighting

Lookup NU author(s): Professor Marina FreitagORCiD

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Abstract

© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.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 μW 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%.

Publication metadata

Author(s): Freitag M, Teuscher J, Saygili Y, Zhang X, Giordano F, Liska P, Hua J, Zakeeruddin SM, Moser J-E, Grätzel M, Hagfeldt A

Publication type: Article

Publication status: Published

Journal: Nature Photonics

Year: 2017

Volume: 11

Issue: 6

Pages: 372-378

Online publication date: 01/05/2017

Acceptance date: 27/03/2017

ISSN (print): 1749-4885

ISSN (electronic): 1749-4893

Publisher: Nature Publishing Group

URL: https://doi.org/10.1038/nphoton.2017.60

DOI: 10.1038/nphoton.2017.60

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