Effect of laser annealing on cdte thin film deposited by thermal evaporation

N. A. Khan, K. S. Rahman, M. I. Kamaruzzaman, F. Haque, M. A. Islam, M. M. Alam, Z. A. Alothman, Kamaruzzaman Sopian, Nowshad Amin

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this study, the influence of laser annealing on the structural, optical and electrical properties of thermally evaporated CdTe thin films has been investigated. CdTe thin films were deposited by thermal evaporation at different power. Thermally evaporated CdTe thin films were then subjected to post deposition laser annealing. The laser annealing was done by illuminating the films by pulsed laser beam with combined wavelengths of 1064nm and 532nm. Both the as-deposited and laser-annealed CdTe thin films were characterized using XRD, AFM, FESEM integrated with EDS, UV-Vis spectroscopy and Hall Effect measurement system. The as-grown and laser-annealed CdTe thin films deposited on soda lime glass showed polycrystalline nature with a mixture of zinc-blende (cubic, C) and wurtzite (hexagonal, H) phases. AFM images on the other hand showed increase in R.M.S roughness value after laser annealing. FESEM micrographs revealed the increase in grain size and the EDS results showed that the CdTe films became tellurium rich upon laser annealing. The band gap of the films increased after laser annealing due to the quantum confinement effect as revealed from optical analysis. Hall Effect measurement found different electrical nature of the CdTe thin films after laser annealing.

Original languageEnglish
Pages (from-to)191-200
Number of pages10
JournalChalcogenide Letters
Volume12
Issue number4
Publication statusPublished - 2015

Fingerprint

laser annealing
Thermal evaporation
evaporation
Annealing
Thin films
Lasers
thin films
Hall effect
atomic force microscopy
Energy dispersive spectroscopy
Tellurium
calcium oxides
tellurium
wurtzite
illuminating
Quantum confinement
lasers
pulsed lasers
roughness
Ultraviolet spectroscopy

Keywords

  • CdTe thin films
  • FESEM
  • Laser annealing
  • Thermal evaporation
  • UV-Vis
  • XRD

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Physics and Astronomy(all)

Cite this

Khan, N. A., Rahman, K. S., Kamaruzzaman, M. I., Haque, F., Islam, M. A., Alam, M. M., ... Amin, N. (2015). Effect of laser annealing on cdte thin film deposited by thermal evaporation. Chalcogenide Letters, 12(4), 191-200.

Effect of laser annealing on cdte thin film deposited by thermal evaporation. / Khan, N. A.; Rahman, K. S.; Kamaruzzaman, M. I.; Haque, F.; Islam, M. A.; Alam, M. M.; Alothman, Z. A.; Sopian, Kamaruzzaman; Amin, Nowshad.

In: Chalcogenide Letters, Vol. 12, No. 4, 2015, p. 191-200.

Research output: Contribution to journalArticle

Khan, NA, Rahman, KS, Kamaruzzaman, MI, Haque, F, Islam, MA, Alam, MM, Alothman, ZA, Sopian, K & Amin, N 2015, 'Effect of laser annealing on cdte thin film deposited by thermal evaporation', Chalcogenide Letters, vol. 12, no. 4, pp. 191-200.
Khan NA, Rahman KS, Kamaruzzaman MI, Haque F, Islam MA, Alam MM et al. Effect of laser annealing on cdte thin film deposited by thermal evaporation. Chalcogenide Letters. 2015;12(4):191-200.
Khan, N. A. ; Rahman, K. S. ; Kamaruzzaman, M. I. ; Haque, F. ; Islam, M. A. ; Alam, M. M. ; Alothman, Z. A. ; Sopian, Kamaruzzaman ; Amin, Nowshad. / Effect of laser annealing on cdte thin film deposited by thermal evaporation. In: Chalcogenide Letters. 2015 ; Vol. 12, No. 4. pp. 191-200.
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