An ultraviolet detector based on Al-doped ZnO thin films prepared by sol-gel method

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

Research output: Contribution to journalArticle

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Abstract

The fabrication and characterization of an ultraviolet photoconductive detector based on Al-doped ZnO is reported. The films were prepared with different doping concentration (0 at.%, 1 at.% and 2 at.%) on quartz glass by sol gel method with annealing temperature of 400 °C for 1 hour. The presence of spherical shaped nanoparticles can be observed from FESEM image. By examine the X-ray diffraction spectra, the films have a single-phase ZnO hexagonal wurtzite structure and the crystalline deteriorated at 2 at.% Al compared to undoped ZnO. The UV-Vis spectra showed that the transmittance spectra and the absorption edge shifted to a lower wavelength by doping with Al thus increases the band gap value. I-V curve reveals an improvement in electrical properties when the samples are illuminated under ultraviolet light with a wavelength around 365 nm. At 1 at.% Al, the film have an optimum performance under UV detector at room temperatures which has a larger increment in photocurrent response compared to undoped ZnO and have a faster recovery time than 2 at.% of Al-doped ZnO.

Original languageEnglish
Pages (from-to)1349-1352
Number of pages4
JournalAdvanced Science Letters
Volume19
Issue number5
DOIs
Publication statusPublished - May 2013

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Ultraviolet detectors
Sol-gel Method
Polymethyl Methacrylate
Ultraviolet
Sol-gel process
Thin Films
gel
Gels
Detector
Thin films
Quartz
Temperature
Ultraviolet Rays
Doping (additives)
X-Ray Diffraction
Nanoparticles
wavelength
Glass
Wavelength
electrical property

Keywords

  • Al doped ZnO
  • Sol gel
  • Ultraviolet detector

ASJC Scopus subject areas

  • Education
  • Health(social science)
  • Mathematics(all)
  • Energy(all)
  • Computer Science(all)
  • Environmental Science(all)
  • Engineering(all)

Cite this

An ultraviolet detector based on Al-doped ZnO thin films prepared by sol-gel method. / Rashid, A. R A; Shaari, S.; N V Visvanathan, P. Susthitha Menon; Arshad, N.

In: Advanced Science Letters, Vol. 19, No. 5, 05.2013, p. 1349-1352.

Research output: Contribution to journalArticle

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