Highly Efficient Plasmon Induced Hot-Electron Transfer at Ag/TiO 2 Interface

Song, Jia; Long, Jinlin; Liu, Yawei; Xu, Zihao; Ge, Aimin; Piercy, Brandon D.; Cullen, David A.; Ivanov, Ilia N.; McBride, James R.; Losego, Mark D.; Lian, Tianquan

doi:10.1021/acsphotonics.1c00321

DOE OSTI · 1818646

Highly Efficient Plasmon Induced Hot-Electron Transfer at Ag/TiO 2 Interface

Song, Jia·Long, Jinlin·Liu, Yawei·Xu, Zihao·Ge, Aimin·Piercy, Brandon D.·Cullen, David A.·Ivanov, Ilia N.·McBride, James R.·Losego, Mark D.·Lian, Tianquan

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Abstract

Plasmon induced hot carrier transfer is a promising novel approach for solar energy conversion, but its practical application is often hindered by its low efficiency. This work demonstrates an unprecedented quantum efficiency of plasmonic hot-electron transfer of up to 53 ± 2% from 1.7 nm silver nanoparticles to anatase nanoporous TiOsub>2 films at 400 nm excitation. This efficient hot-electron transfer consists of contributions of both hot electrons generated by plasmon decay through exciting Ag intraband transitions and Ag-to-TiO 2 interfacial charge-transfer transitions. The efficiencies of both pathways increase at smaller Ag particle sizes from 5.9 to 1.7 nm, suggesting that decreasing particle sizes is a promising way toward efficient plasmonic hot-carrier extraction.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY TiO₂ chemical interface damping hot-electron transfer plasmon-induced interfacial charge-transfer transition silver nanoparticle surface plasmon resonance

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Song, Jia, Long, Jinlin, Liu, Yawei, Xu, Zihao, Ge, Aimin, Piercy, Brandon D., Cullen, David A., Ivanov, Ilia N., McBride, James R., Losego, Mark D., Lian, Tianquan. 2021-04-29. Highly Efficient Plasmon Induced Hot-Electron Transfer at Ag/TiO 2 Interface. https://doi.org/10.1021/acsphotonics.1c00321

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