Highly Efficient Plasmon Induced Hot-Electron Transfer at Ag/TiO2 Interface
- Emory Univ., Atlanta, GA (United States)
- Emory Univ., Atlanta, GA (United States); Fuzhou Univ. (China)
- Georgia Inst. of Technology, Atlanta, GA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Vanderbilt Univ., Nashville, TN (United States). Vanderbilt Institute of Nanoscale Science and Engineering
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-TiO2 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.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- China Scholarship Council; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725; SC0008798
- OSTI ID:
- 1818646
- Journal Information:
- ACS Photonics, Journal Name: ACS Photonics Journal Issue: 5 Vol. 8; ISSN 2330-4022
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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