A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1991-10

AUTHORS

Brian O'Regan, Michael Grätzel

ABSTRACT

THE large-scale use of photovoltaic devices for electricity generation is prohibitively expensive at present: generation from existing commercial devices costs about ten times more than conventional methods1. Here we describe a photovoltaic cell, created from low-to medium-purity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency. The device is based on a 10-µm-thick, optically transparent film of titanium dioxide particles a few nanometres in size, coated with a monolayer of a charge-transfer dye to sensitize the film for light harvesting. Because of the high surface area of the semiconductor film and the ideal spectral characteristics of the dye, the device harvests a high proportion of the incident solar energy flux (46%) and shows exceptionally high efficiencies for the conversion of incident photons to electrical current (more than 80%). The overall light-to-electric energy conversion yield is 7.1-7.9% in simulated solar light and 12% in diffuse daylight. The large current densities (greater than 12 mA cm-2) and exceptional stability (sustaining at least five million turnovers without decomposition), as well as the low cost, make practical applications feasible. More... »

PAGES

737-740

Journal

TITLE

Nature

ISSUE

6346

VOLUME

353

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  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1038/353737a0

    DOI

    http://dx.doi.org/10.1038/353737a0

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    https://app.dimensions.ai/details/publication/pub.1014356537


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