Nanocrystalline aluminum doped zinc oxide coated fiber optic for ultraviolet detection

A. R A Rashid, P. Susthitha Menon N V Visvanathan, S. Shaari

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this paper, we report the fabrication and characterization of an ultraviolet sensing by using Al-doped ZnO films coated on quartz slide and silica fiber optic. Undoped ZnO, 0.5, 1, 2 and 3 at.% of Al were prepared by sol-gel method with annealing temperature of 400°C for 1 h. The presence of spherical shaped nanoparticles and hexagonal (wurtzite) structure were detected for Al doped ZnO by using FESEM and XRD. The band gap values increased by adding Al due to the increment of carrier concentration. I-V curves reveal an ohmic line and improvement in electrical conductivity when the samples are illuminated by ultraviolet (UV) light with a wavelength of 365 nm. At 1 at.% of Al, the film have a larger increment in photocurrent response when illuminated with UV light compared to undoped ZnO and higher concentration (2 at.% and 3 at.%) of Al. For coated fiber optic, the fiber operates under leaky mode and the refractive index of ZnO is decreasing under UV radiation. There is a small drop in output intensity and increased abruptly which depends on the changes of ZnO refractive index. The thin films have a longer recovery time than response time.

Original languageEnglish
Article number1350037
JournalJournal of Nonlinear Optical Physics and Materials
Volume22
Issue number3
DOIs
Publication statusPublished - Sep 2013

Fingerprint

Zinc Oxide
Zinc oxide
Aluminum
ultraviolet radiation
zinc oxides
Fiber optics
fiber optics
Refractive index
aluminum
Quartz
Photocurrents
Ultraviolet radiation
Silicon Dioxide
refractivity
Sol-gel process
Carrier concentration
Energy gap
Silica
Annealing
Nanoparticles

Keywords

  • Al-doped ZnO
  • coated fiber optic
  • UV sensing

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy (miscellaneous)

Cite this

Nanocrystalline aluminum doped zinc oxide coated fiber optic for ultraviolet detection. / Rashid, A. R A; N V Visvanathan, P. Susthitha Menon; Shaari, S.

In: Journal of Nonlinear Optical Physics and Materials, Vol. 22, No. 3, 1350037, 09.2013.

Research output: Contribution to journalArticle

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