Work

Nanocrystalline Mesoporous Strontium Titanate as Photoelectrode Material for Photosensitized Solar Devices: Increasing Photovoltage through Flatband Potential Engineering

Year: 1999

Type: article

Abstract: Nanocrystalline SrTiO 3 is synthesized by hydrothermal treatment of nanocrystalline titanium dioxide in the presence of strontium hydroxide. Working photoelectrochemical solar cells are produced using these nanometer-sized semiconductor particles as photoelectrode materials. At AM 1.5, measured open circuit voltages were roughly 100 mV higher than in solar cells produced using nanocrystalline titanium dioxide (anatase), in agreement with a simple relation between semiconductor conduction band edge and open circuit voltage for these cells. Photocurrents measured in the SrTiO 3 cells were roughly 1/3 those measured with TiO 2 (anatase) -based cells. On the basis of flash laser photolysis and absorptance studies, we suggest that low dye loading and possibly suboptimal dye−oxide interactions can be the cause for the relatively low photocurrents in the SrTiO 3 system.

Source: The Journal of Physical Chemistry B

DOI: 10.1021/jp9913867

Authors: Shelly Burnside, Jacques-E. Moser, Keith Brooks, Michael Grätzel, David Cahen

Institutions: École Polytechnique Fédérale de Lausanne, Weizmann Institute of Science

Language: English

Topic: TiO2 Photocatalysis and Solar Cells

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: green

Funder: Bundesamt für Energie