Charge carriers dynamics in oxide photoelectrodes

James Durrant^a

^aImperial College London, United Kingdom, South Kensington, Londres, Reino Unido, United Kingdom

Proceedings of International Conference on New Advances in Materials Research for Solar Fuels Production (SolarFuel14)

Montréal, Canada, 2014 June 25th - 26th

Organizer: Thomas Hamann

Keynote, James Durrant, presentation 036
Publication date: 16th April 2014

The development of low cost, stable and efficient materials for solar driven fuel synthesis is a key scientific challenge for addressing global sustainability concerns. My lecture will focus upon separation and recombination dynamics of some of the nanostructured metal oxide photoelectrodes currently being developed for solar water photolysis. A range of experimental techniques will be employed to address some of the key processes limiting the efficiency of water oxidation / reduction on such electrodes. Transient absorption spectroscopy on timescales from femtoseconds to seconds will be correlated with the results of photoelectrochemical analyses such impedance analyses and photocurrent transients. Experimentally, my lecture will be based around our studies of role of nanostructured hematite, titania and bismuth vandate photoelectrodes, as well as hybrid molecular/inorganic systems employing molecular catalysts and sensitizer dyes. Recurring themes of my talk will be the balance between energetics and kinetics in achieving efficient charge separation, the importance of materials heterojunctions and space charge layers to separate charge, and the link between charge carrier dynamics and the efficiency of photoelectrode function.

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