Effect of Substrate Temperature on the Electrical Properties of Al-doped Zinc Oxide Films Deposited on Polyethylene Terephthalate

Mohammad G. Faraj

doi:10.14500/aro.11086

Mohammad G. Faraj Department of Physics, Faculty of Science and Health, Koya University, Koya KOY45, Kurdistan Region – F.R. Iraq http://orcid.org/0000-0001-9921-0208

Keywords: Al-doped Zinc Oxide, Chemical spray pyrolysis, Electrical properties, Hall measurements, Polyethylene terephthalate

Abstract

To prepare homogeneous thin films of zinc oxide (ZnO) doped with aluminum (Al) on a polyethylene terephthalate (PET) substrate at different temperatures (200-250 °C), the process is carried out by utilizing the chemical spraying pyrolysis approach. A study of the effects of substrate temperature on the Al-doped Zinc Oxide (AZO) films' electrical characteristics and roughness is performed. The measurements of atomic force microscopy (AFM) shows that the root mean square (RMS) roughness of the AZO films is increased with the increase of PET substrate temperature. Hall measurements show that the electrical resistivity decreases as the substrate temperature increases. Upon the increment of substrate temperature, there is an increase in the carrier concentration value from 9.98 × 10¹⁹ to 5.4 × 10²⁰ cm⁻³ and an increase in the carrier mobility value from 5.5 to 9.76 cm².(V. S)⁻¹.

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Author Biography

Mohammad G. Faraj, Department of Physics, Faculty of Science and Health, Koya University, Koya KOY45, Kurdistan Region – F.R. Iraq

Mohammad Ghaffar Faraj is an Assistant Professor at the Department of Physics, Koya University. He received his B.Sc. and M.Sc. degrees in physics, both from the University of Al-Mustansiryah, Iraq, in 2001 and 2004, respectively. He received his Ph.D. degree in solar energy from the School of Physics; University Sains Malaysia (USM), Malaysia, 2012. He completed Post-doctorate Fellow, Polymer Thin Film, in 2017 from University of Santiago de Compostela (USC), Spain. His research interests include solar cells, thin films, nanotechnology, polymers, and photodetectors Heterojunction.

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