Charge transport in Fe2O3 films deposited on nanowire arrays

Piers R. F. Barnes, David Blake, Julie Glasscock, Ian C. Plumb, Peter F. Vohralik, Avi Bendavid, Phil J. Martin

Research output: Contribution to journalConference articleResearchpeer-review


The short diffusion length of photo-excited charge carriers in Fe2O3 is one of the factors limiting the water splitting efficiency of iron oxide based materials. To overcome this problem we are engineering transparent arrays of nanowires to act as conducting substrates for the Fe2O3. To help understand the charge transport characteristics of the Fe2O3 component we report transient photocurrent measurements performed on an absorbing thin film of Fe2O3 deposited by filtered arc deposition on conducting glass with a semi-transparent silver Schottky top contact. Ultraviolet laser pulses were used to generate charge carriers near the surface and the resulting current transients were measured. A simulation of this charge transport has also been developed. The sign of the observed transients was independent of applied bias, consistent with a fully depleted film. The measurements also suggest that recombination may play a significant factor in determining the transient shape. Further investigation is required to confidently predict mobilities.
Original languageEnglish
JournalProceedings of SPIE - The International Society for Optical Engineering
Pages (from-to)63400P
Publication statusPublished - 2006
Externally publishedYes
EventConference on Solar Hydrogen and Nanotechnology - San Diego, CA, United States
Duration: 14 Aug 200617 Aug 2006


ConferenceConference on Solar Hydrogen and Nanotechnology
Country/TerritoryUnited States
CitySan Diego, CA


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