Issue 8, 2015

Improved UV photoresponse of ZnO nanorod arrays by resonant coupling with surface plasmons of Al nanoparticles

Abstract

In this study, localized surface plasmon resonance mediated by aluminium nanoparticles (Al NPs) was employed to enhance the ultraviolet (UV) response of ZnO nanorod array (NRA) photodetectors grown vertically on a Quartz substrate using a simple vapor transport method. The responsivity of the ZnO NRA photodetector decorated with Al NPs was enhanced from 0.12 to 1.59 A W−1 and the sensitivity and response rate have been improved greatly compared with those of the bare one. The measurement results in the transmittance spectra and time-resolved photoluminescence spectra suggest that the improved photoresponse and the enhanced spontaneous emission of the ZnO NRA photodetector with Al NP decoration are both attributed to resonant coupling between the excitons in ZnO and the localized surface plasmons (LSPs) in the Al NPs. Our results demonstrated that the plasmon-enhanced ZnO NRA photodetector has a great potential for application in building sensors with a fast response and reset time, high sensitivity, and good signal-to-noise ratio for photoelectric sensing.

Graphical abstract: Improved UV photoresponse of ZnO nanorod arrays by resonant coupling with surface plasmons of Al nanoparticles

Article information

Article type
Communication
Submitted
02 Dec. 2014
Accepted
13 Janv. 2015
First published
13 Janv. 2015

Nanoscale, 2015,7, 3396-3403

Improved UV photoresponse of ZnO nanorod arrays by resonant coupling with surface plasmons of Al nanoparticles

J. Lu, C. Xu, J. Dai, J. Li, Y. Wang, Y. Lin and P. Li, Nanoscale, 2015, 7, 3396 DOI: 10.1039/C4NR07114J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements