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      https://www.ias.ac.in/article/fulltext/boms/037/05/0983-0989

    • Keywords

       

      DIBSD; in situ annealing; PL; XRD; XPS; ZnO.

    • Abstract

       

      We have investigated the influence of in situ annealing on the optical, electrical, structural and morphological properties of ZnO thin films prepared on 𝑝-type Si(100) substrates by dual ion beam sputtering deposition (DIBSD) system. X-ray diffraction (XRD) measurements showed that all ZnO films have (002) preferred orientation. Full-width at half-maximum (FWHM) of XRD from the (002) crystal plane was observed to reach to a minimum value of 0.139° from ZnO film, annealed at 600 °C. Photoluminescence (PL) measurements demonstrated sharp near-band-edge emission (NBE) at ∼ 380 nm along with broad deep level emissions (DLEs) at room temperature. Moreover, when the annealing temperature was increased from 400 to 600 °C, the ratio of NBE peak intensity to DLE peak intensity initially increased, however, it reduced at further increase in annealing temperature. In electrical characterization as well, when annealing temperature was increased from 400 to 600 °C, room temperature electron mobility enhanced from 6.534 to 13.326 cm2/V s, and then reduced with subsequent increase in temperature. Therefore, 600 °C annealing temperature produced good-quality ZnO film, suitable for optoelectronic devices fabrication. X-ray photoelectron spectroscopy (XPS) study revealed the presence of oxygen interstitials and vacancies point defects in ZnO film annealed at 400 °C.

    • Author Affiliations

       

      Sushil Kumar Pandey1 Saurabh Kumar Pandey1 Vishnu Awasthi1 Ashish Kumar1 Uday P Deshpande2 Mukul Gupta2 Shaibal Mukherjee1

      1. Discipline of Electrical Engineering, Hybrid Nanodevice Research Group, Indian Institute of Technology, Indore 453 441, India
      2. Department of Atomic Energy (UGC DAE), Consortium for Scientific Research, University Grants Commission, Indore 452 001, India
    • Dates

       
  • Bulletin of Materials Science | News

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