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Effects of Interfaces and Growth Sites on the Extraction Efficiency of Plasmonic Hot Electrons in Photocatalysis.
- Source :
- ACS Applied Nano Materials; 1/26/2024, Vol. 7 Issue 2, p2132-2142, 11p
- Publication Year :
- 2024
-
Abstract
- The efficiencies of plasmonic hot-electron-based materials or devices are determined by the transfer efficiency of hot electrons from plasmonic metals to semiconductors. Since the hot-electron transfer takes place at the interface between plasmonic metals and semiconductors, their interface plays a critical role in the hot-electron efficiency. Herein, Au/CdS and Au/CdSe nanostructures with different morphologies are synthesized to study the morphology and interface effects on the hot-electron efficiency. The end-selectively grown nanostructures, Au/end-CdSe and Au/end-CdSe, show extraction efficiencies of hot electrons higher than those of their corresponding fully coated counterparts. For the nanostructures with the same morphology, the Au/CdSe nanostructures have a much higher hot-electron efficiency than the Au/CdS ones. Theoretical calculations indicate that Au/CdS nanostructures exhibit formidable barriers for hot-electron injection, while Au/CdSe nanostructures show resonant electronic states between two components near the Fermi level and are without barriers for hot-electron injection. These two effects jointly account for the higher hot-electron efficiency of Au/CdSe, regardless of whether a direct or indirect transfer mechanism occurs in Au/CdSe nanostructures. These findings unveil the interfacial and morphology effects on the hot-electron efficiency of plasmonic metal/semiconductor nanostructures and will be helpful in the design of nanostructures with high hot-electron efficiency. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 25740970
- Volume :
- 7
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- ACS Applied Nano Materials
- Publication Type :
- Academic Journal
- Accession number :
- 175072869
- Full Text :
- https://doi.org/10.1021/acsanm.3c05442