Nano Archive

Backside illuminated dye-sensitized solar cells based on titania nanotube array electrodes

Paulose, Maggie and Shankar, Karthik and Varghese, Oomman K. and Mor, Gopal K. and Hardin, Brian and Grimes, Craig A. (2006) Backside illuminated dye-sensitized solar cells based on titania nanotube array electrodes. Nanotechnology, 17 (5). pp. 1446-1448. ISSN 09574484


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Backside illuminated solar cells based on 6 ìm long highly-ordered nanotube-array films sensitized by a self-assembled monolayer of bis(tetrabutylammonium)-cis-(dithiocyanato)-N,N-bis(4-carboxylato-4- carboxylic acid-2,2-bipyridine)ruthenium(II) (commonly called ‘N719’)show a short-circuit current density of 8.79 mA cm.2, 841 mV open circuit potential and a 0.57 fill factor yielding a power conversion efficiency of 4.24% under AM 1.5 sun. The solvent used to infiltrate the dye into the nanotube arrays, made by potentiostatic anodization of a titanium foil, was found to significantly influence the electrical characteristics of the resulting solar cell. A superior photoresponse was obtained with acetonitrile as the dye solvent. This is attributed to the improved wetting characteristics of the dye solution in acetonitrile enabling self-assembled monolayers with higher surface coverage to be formed inside the nanotubes. In comparison to nanocrystalline films, the nanotube-array films consistently exhibit larger open circuit photovoltage values; the origins of this enhancement are discussed.

Item Type:Article
Subjects:Technology > Nanotechnology and environmental applications
Technology > Nanotechnology and energy applications
Physical Science > Photonics
ID Code:193
Deposited By:Lesley Tobin
Deposited On:14 Nov 2008 16:48
Last Modified:26 Mar 2009 16:49

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