Jump to main content
Jump to site search

Issue 30, 2014
Previous Article Next Article

Enhanced emission properties of Au/SiO2/ZnO nanorod layered structure: effect of SiO2 spacer layer and role of interfacial charge transfer

Author affiliations

Abstract

SiO2 spacer layers of various thicknesses in between an Au and ZnO nanorod (NR) layer (Au/ZnO) have been introduced and the luminescence properties of the layered ensemble have been investigated. When ZnO NRs are grown directly on a granular Au layer, the ultraviolet (UV) emission of ZnO was enhanced nearly 2 times due to surface plasmon resonance (SPR) mediated charge transfer between Au and ZnO. A significant improvement is observed when the SiO2 spacer layer is introduced in between Au and ZnO. The UV/VIS emission intensity ratio of Au/SiO2/ZnO NRs' becomes ∼6 times higher than that of the pristine ZnO NRs. A SPR mediated electron transfer from Au/SiO2 to ZnO causes such an enhanced UV emission. The spacer diminishes the reverse electron transfer process from the conduction band of ZnO to the Fermi level of Au, a most competitive reason for PL quenching, which also accounts for the emission enhancement.

Graphical abstract: Enhanced emission properties of Au/SiO2/ZnO nanorod layered structure: effect of SiO2 spacer layer and role of interfacial charge transfer

Back to tab navigation

Publication details

The article was received on 03 Feb 2014, accepted on 14 Mar 2014 and first published on 18 Mar 2014


Article type: Paper
DOI: 10.1039/C4RA00950A
Citation: RSC Adv., 2014,4, 15466-15473
  •   Request permissions

    Enhanced emission properties of Au/SiO2/ZnO nanorod layered structure: effect of SiO2 spacer layer and role of interfacial charge transfer

    M. Mahanti and D. Basak, RSC Adv., 2014, 4, 15466
    DOI: 10.1039/C4RA00950A

Search articles by author

Spotlight

Advertisements