A plasmonic photoelectrochemical cell was constructed in order to investigate the energetics and dynamics of hot electrons in Au-TiO2 heterojunctions under visible light excitation. The lifetime of hot electrons within the TiO2 conduction band was monitored by open-circuit photovoltage techniques and was found to exhibit lifetimes that were one to two orders of magnitude longer than that observed through direct excitation of the semiconductor support by UV light. These results suggest the possibility of dramatically improving the photocatalytic efficiency of numerous photochemical processes and have broad implications for visible light-mediated photocatalysis.

Probing hot electron dynamics in plasmonic metal-semiconductor (Au-TiO<sub>2</sub>) heterojunctions

246th National Meeting (2013)

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Probing hot electron dynamics in plasmonic metal-semiconductor (Au-TiO2) heterojunctions

Probing hot electron dynamics in plasmonic metal-semiconductor (Au-TiO₂) heterojunctions