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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 3 — Feb. 11, 2013
  • pp: 3253–3258

Silica-coated and annealed CdS nanowires with enhanced photoluminescence

Shan Liang, Min Li, Jia-Hong Wang, Xiao-Li Liu, Zhong-Hua Hao, Li Zhou, Xue-Feng Yu, and Qu-Quan Wang  »View Author Affiliations


Optics Express, Vol. 21, Issue 3, pp. 3253-3258 (2013)
http://dx.doi.org/10.1364/OE.21.003253


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Abstract

The CdS/SiO2 core/shell nanowires (NWs) with controlled shell thickness were successfully synthesized and subsequently heat-treated at 500 °C. The influences of silica shell coating and annealing processes on their optical properties have been investigated. Compared with original CdS NWs, the annealed CdS/SiO2 NWs exhibited an enhanced band-edge emission with slowed photoluminescence lifetime, while the intensity of defect emission decreased. The results were ascribed to the surface passivation and recrystallization by shell coating and annealing. We believe our finding would help improving the optical properties of semiconductor NWs, and facilitate its applications in various realms, such as nanoscale emitter, sensor, and photoelectric device.

© 2013 OSA

OCIS Codes
(160.6000) Materials : Semiconductor materials
(250.5230) Optoelectronics : Photoluminescence
(300.6500) Spectroscopy : Spectroscopy, time-resolved

ToC Category:
Spectroscopy

History
Original Manuscript: December 14, 2012
Revised Manuscript: January 17, 2013
Manuscript Accepted: January 18, 2013
Published: February 1, 2013

Citation
Shan Liang, Min Li, Jia-Hong Wang, Xiao-Li Liu, Zhong-Hua Hao, Li Zhou, Xue-Feng Yu, and Qu-Quan Wang, "Silica-coated and annealed CdS nanowires with enhanced photoluminescence," Opt. Express 21, 3253-3258 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-3-3253


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