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    • Structural, morphological, optical and electrical properties of Ni-doped SnO$_2$ thin films by pneumatic spray pyrolysis method

      SABRINA ROGUAI ABDELKADER DJELLOUL

      Volume 45 Published: 16 November 2022 Article ID 0227

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/045/0227

    • Keywords

       

      Ni-doped SnO$_2$ thin films; pneumatic spray pyrolysis; Seebeck coefficient; optical properties.

    • Abstract

       

      In this study, we used a pneumatic spray pyrolysis technique at 450°C to deposit Sn$_{1–x}$Ni$_x$O$_2$ thin films (0.0 ${\le}$ x ${\le}$ 0.10) on glass substrates. The influence of doping content on the films structural, morphological, optical andelectrical properties was investigated. Structural characterization by X-ray diffraction indicated that the rutile phase of SnO$_2$ is present in all thin films, and crystallite sizes are estimated to be in the range of 27–47 nm. Furthermore, structural and microstructural analyses revealed that at x = 0.05, there is a solubility limit for (Ni/Sn) in the SnO$_2$ matrix. The optical bandgap energy increases from 3.83 to 4.01 eV as the dopant content increases according to the Burstein-Moss effect. Resistivity is affected by doping and the thickness of thin films. The figure-of-merit calculated for all samples showed significant differences in the Ni–SnO$_2$ thin films. There was a difference between the doped thin films depending on the thickness. The lowest resistivity of 1.32${\times}$10$^{-2}$ ${\Omega}$ cm and the maximum conductivity of 75 ${\Omega}^{-1}$ cm$^{-1}$ was found at a Ni content of 2%. Seebeck coefficient of all the thin films developed had n-type conductivity, and the values of 76, 71,133 and 69 ${\mu}$ V/K for Ni-doped SnO$_2$ thin films at 0, 2, 5 and 10 at.%, respectively, were found to improve the thermoelectric properties of SnO$_2$ by Ni doping.

    • Author Affiliations

       

      SABRINA ROGUAI1 2 ABDELKADER DJELLOUL1 2

      1. LASPI2A Laboratory of Structures, Properties and Interatomic Interactions, Abbes Laghrour University, Khenchela 40000, Algeria
      2. Science of Matter, Abbes Laghrour University, Khenchela 40000, Algeria

    • Dates

       
      Published
      16 November 2022
      Manuscript received
      11 April 2022
      Accepted
      12 July 2022
      Final version published online
      16 November 2022

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