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Publications associées (64)

A 5% efficient photoelectrochemical solar cell based on nanostructured ZnO electrodes

Nanoporous ZnO electrodes, dye-sensitized with a ruthenium bipyridyl complex, were used as photoanodes in photoelectrochem. solar cells. By improving the interfacial contact between dyes and ZnO particles in the film, overall solar-to-elec. energy conversi ...

2002

Electrochemical Micromachining of Titanium through a Laser Patterned Oxide Film

Patrik Willi Hoffmann, Dieter Landolt

Selective dissolution of titanium through a laser patterned oxide film has been achieved in a 3M sulfuric acid-methanol electrolyte. The 250 nm thick oxide film was formed anodically on a flat titanium surface in 0.5 M sulfuric acid. The patterning of the ...

2001

Charge transport in nanostructured thin-film electrodes

Ulf Anders Hagfeldt

A review. Recent work on the charge transport in mesoscopic nanostructured film electrodes is summarized. Results from intensity-modulated photocurrent spectroscopy (IMPS) and intensity-modulated photovoltage spectroscopy (IMVS) studies are given, and the ...

Wiley-VCH Verlag GmbH2001

Dielectric breakdown in (Pb,La)(Zr,Ti)O-3 ferroelectric thin films with Pt and oxide electrodes

Nava Setter, Alexander Tagantsev, Igor Stolichnov, Serguei Okhonin

Dielectric breakdown of (Pb,La)(Zr,Ti)O-3(PLZT) film capacitors with Pt and SrRuO3 electrodes, in its initial or virgin state and after voltage cycling that causes polarization fatigue, is studied by constant-current measurements. It is shown that for diff ...

2000

Process for producing nanostructured metal oxide thin films on substrates

Ulf Anders Hagfeldt

A process for producing at least one epitaxial, nanostructured thin film of metal oxide and/or a hydrated metal oxide on at least one substrate placed in a container and a substrate/thin film thereof, comprises placing the substrate at any location in the ...

Swed.1999

La1-xSrxCoO3 as electrode materials for ferroelectric thin film applications

Paul Muralt, Nicolas Ledermann

PZT thin films for memory applications are known to lack sufficient resistance versus polarization fatigue when used together with platinum. One possible solution for this problem is to use conductive oxides like La1-xSrxCoO3 (LSCO) as an electrode. In thi ...

1998

Properties of thin anti-adhesive films used for the replication of microstructures in polymers

Giorgio Margaritondo

The aim of this work was to investigate the degradation of the anti-adhesive properties of protective PTFE films during the hot embossing of thermoplasts, and to identify possible failure causes which reduce the lifetime of these films. A comparative XPS s ...

1997

Photoinduced poling of lead titanate zirconate thin films

Nava Setter

The influence of ultraviolet (UV) illumination on piezoelectric properties is investigated in lead zirconate titanate (PZT) thin films. It is found that the poling procedure is more effective when the film is exposed to a broadband UV light in the presence ...

1997

High Light-to-Energy Conversion Efficiencies for Solar Cells Based on Nanostructured ZnO Electrodes

Ulf Anders Hagfeldt, Liang Wang

Photoelectrochem. properties of nanostructured ZnO thin film electrodes have been investigated in the UV and visible regions. For films consisting of 15 nm large undoped crystallites a max. monochromatic current conversion efficiency of 58% was obtained in ...

1997

Scanning Force Microscopy Characterization of Langmuir-Blodgett Films of Sulfur-Bearing Lipids on Mica and Gold

Horst Vogel, Martha Liley, Claus Duschl

Physisorbed and covalently bound Langmuir-Blodgett (LB) monolayers of sulfur-bearing lipids on mica and on gold substrates, resp., have been studied. Scanning force microscopy, in topog. and friction modes as well as in contact and non-contact modes have b ...

1995

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