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Journal of Materials Science: Materials in Electronics

, Volume 29, Issue 17, pp 14774–14782 | Cite as

Optical and electrical optimization of dysprosium-doped CdS thin films

  • S. Yılmaz
  • İ. Polat
  • M. Tomakin
  • S. B. Töreli
  • T. Küçükömeroğlu
  • E. Bacaksız
Article

Abstract

As-grown and Dy-doped CdS thin films containing concentrations of 1, 2, 3, 4 and 5 at.% Dy atom were prepared via chemical spray route on glass substrates. The constructed thin films were searched through analyzing their structural, morphological, optical and electrical features. X-ray diffraction (XRD) surveys showed that as-grown and Dy-doped CdS thin films had hexagonal structure and the preferential orientation was along (101) plane for as-grown, 1 and 2 at.% Dy-dopings. But further dopings (3 and 4 at.%) caused more random orientation, especially for the case of 5 at.%, the preferred orientation changed to (002) plane. The crystallite size progressively lessened from 39 to 27 nm with increasing Dy-doping. The existence of a close relation between grain shape and the preferential orientation appeared as compared to micrographs of scanning electron microscopy with XRD data. 5 at.% Dy-doped CdS thin films possessed the best transmittance (over 80%) among all the samples. Except for 2 at.% Dy-doped CdS sample, the other samples had almost a band gap of 2.45 eV. Photoluminescence results revealed that more stoichiometric thin films were formed after Dy-incorporations. The outcomes of the electrical investigation evidenced that the best sample was 1 at.% Dy-doped CdS thin films since the lowest resistivity (6.35 × 103 Ω cm) and highest carrier concentration (1.06 × 1014 cm−3) were obtained for this specimen.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • S. Yılmaz
    • 1
  • İ. Polat
    • 2
  • M. Tomakin
    • 3
  • S. B. Töreli
    • 1
  • T. Küçükömeroğlu
    • 4
  • E. Bacaksız
    • 4
  1. 1.Department of Materials Engineering, Faculty of EngineeringAdana Science and Technology UniversityAdanaTurkey
  2. 2.Department of Energy Systems Engineering, Faculty of TechnologyKaradeniz Technical UniversityTrabzonTurkey
  3. 3.Department of Physics, Faculty of Arts and SciencesRecep Tayyip Erdogan UniversityRizeTurkey
  4. 4.Department of Physics, Faculty of SciencesKaradeniz Technical UniversityTrabzonTurkey

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