Photoelectrochemical response of Ag-graphene heterostructures: insight into the localized surface plasmon enhanced photocurrent generation process
- 20 September 2019
- journal article
- research article
- Published by IOP Publishing in Nanotechnology
- Vol. 30 (49), 495203
- https://doi.org/10.1088/1361-6528/ab3ee4
Abstract
We present Ag-graphene heterostructures by combining few layer graphene (FLG) with plasmonic silver nanoparticle (AgNP) arrays to boost the photoelectrochemical (PEC) efficiency of graphene-based nanostructures. AgNP arrays with controlled coverage and size distribution were fabricated on the graphene surface by means of gas phase cluster beam deposition. The photocurrent generation process in the FLG-based nanostructures was analyzed with a PEC amperometric measurement. A significant photocurrent enhancement was observed in the AgNPs-FLG heterostructures compared with bare FLG. It was found that the PEC performance was strongly related to the wavelength and power of the incident light, as well as the density and size of the AgNPs. The enhancement of the PEC response was attributed to the effect of the surface plasmon local fields of the AgNPs, which induce efficient generation and quick separation of the electron-hole pairs in FLG.Keywords
Funding Information
- National Natural Science Foundation of China (11627806, 21633003)
- National Key R&D Program of China (2016YFA0201002)
This publication has 57 references indexed in Scilit:
- Plasmonic photocatalysisReports on Progress in Physics, 2013
- Atomic Structure of Reduced Graphene OxideNano Letters, 2010
- Plasmonics for improved photovoltaic devicesNature Materials, 2010
- High Mobility, Printable, and Solution-Processed Graphene ElectronicsNano Letters, 2009
- Photo-Thermoelectric Effect at a Graphene Interface JunctionNano Letters, 2009
- Ultrafast graphene photodetectorNature Nanotechnology, 2009
- Large-scale pattern growth of graphene films for stretchable transparent electrodesNature, 2009
- Substrate-induced bandgap opening in epitaxial grapheneNature Materials, 2007
- Bioconjugated Ag Nanoparticles and CdTe Nanowires: Metamaterials with Field-Enhanced Light AbsorptionAngewandte Chemie, 2006
- Kinetic Approach to the Photocurrent Transients in Water Photoelectrolysis at n ‐ TiO2 Electrodes: II . Analysis of the Photocurrent‐Time DependenceJournal of the Electrochemical Society, 1990