Title: Surface plasmon-enhanced UV emission of ZnO nanorods using Ag nanoparticles

Authors: Xiu Li; Xiuyan Chen; Yanfang Xu; Zhiqing Xin; Yaling Li; Luhai Li

Addresses: Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing 102600, China ' College of Physics Science and Technology, Shenyang Normal University, Shenyang 110034, China; Shanghai Key Laboratory of Solid State Laser and Application, and Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China ' Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing 102600, China ' Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing 102600, China ' Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing 102600, China ' Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing 102600, China

Abstract: The emission properties of Ag-decorated ZnO nanorods were studied. The widths and lengths of the nanorods ranged from 60 nm to 200 nm. The photoluminescence (PL) spectra of bare ZnO nanorods showed a weak bandgap emission at around 370 nm and a broad defect-related emission band centred at ∼570 nm. After adding Ag, it resulted in an increase and decrease of the near band edge (NBE) and defect-related emission intensities, respectively. The reasons for the enhancement of the band edge emission which caused by the surface plasmon resonance coupling of the near band edge emission between Ag and ZnO are discussed. The visible emission has been suppressed significantly leading to a UV/visible emission ratio of 6 compared with a value of 1.6 for the pristine ZnO nanorods. The enhancement is due to the surface plasmon resonance effect.

Keywords: surface plasmon resonance; silver nanoparticles; ZnO nanorods; zinc oxide; band edge emission; enhancement; UV emissions; ultraviolet emissions; photoluminescence; nanotechnology.

DOI: 10.1504/IJNT.2015.071797

International Journal of Nanotechnology, 2015 Vol.12 No.10/11/12, pp.860 - 867

Published online: 18 Sep 2015 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article