Effects of ultraviolet illumination on Sol-Gel synthesized Al-doped ZnO thin films

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

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The performance of ultraviolet detector based on Al-doped ZnO is reported. The Al dopant concentration were varied at 0 at.%, 0.5 at.%, 1 at.%, 2 at.% and 3 at.% using sol gel method with annealing temperature of 450 °C for 1 hour. X-ray diffraction patterns show that the crystalline size reduces when doped with Al and the peak position of the (002) plane shifted to lower 2 values. The optical band gap shift for Al doped ZnO may be due to Burstein-Moss shift and effect of band shrinkage. I-V curve reveals an improvement in electrical properties when the samples were illuminated by ultraviolet light under room temperature. The rate of response depends on the band gap value of each films. 0.5 at.% of Al has the highest ratio response under ultraviolet illumination but they need longer time to recover. 1 at.% of Al has better response than undoped ZnO and better recovery rate than 0.5 at.% as well as 2 at.% which suitable for repeatable ultraviolet detector.

Original languageEnglish
Pages (from-to)816-819
Number of pages4
JournalAdvanced Science Letters
Volume19
Issue number3
DOIs
Publication statusPublished - Mar 2013

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Ultraviolet detectors
Sol-gel
Polymethyl Methacrylate
Lighting
Ultraviolet
Sol-gels
Thin Films
Illumination
gel
Gels
Bryophyta
Thin films
Temperature
electrical property
Optical band gaps
Band Gap
annealing
Ultraviolet Rays
X-Ray Diffraction
moss

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

Effects of ultraviolet illumination on Sol-Gel synthesized Al-doped ZnO thin films. / Shaari, S.; Rashid, A. R A; N V Visvanathan, P. Susthitha Menon; Arshad, N.

In: Advanced Science Letters, Vol. 19, No. 3, 03.2013, p. 816-819.

Research output: Contribution to journalArticle

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