10.1007/s40089-018-0251-5

Effect of Ag incorporation on structural and opto-electric properties of pyrolized CdO thin films

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  • M. R. Alam1,
  • M. Mozibur Rahman1,
  • A. M. M. Tanveer Karim2,
  • M. K. R. Khan*1,
  1. Department of Physics, University of Rajshahi, Rajshahi, 6205, BD
  2. Department of Physics, Rajshahi University of Engineering and Technology, Rajshahi, 6204, BD
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Published in Issue 2018-10-26

How to Cite

Alam, M. R., Mozibur Rahman, M., Tanveer Karim, A. M. M., & Khan, M. K. R. (2018). Effect of Ag incorporation on structural and opto-electric properties of pyrolized CdO thin films. International Nano Letters, 8(4 (December 2018). https://doi.org/10.1007/s40089-018-0251-5
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Abstract

Abstract We have investigated the structure, morphology and opto-electric properties of CdO and Ag-incorporated CdO thin films prepared by chemical spray pyrolysis (CSP) method. The X-ray diffraction (GIXRD) study confirms that CdO samples are highly polycrystalline with cubic structure. The AFM study shows smooth surfaces both for CdO and Ag-CdO thin films. The direct band gap energy varies from 2.25 to 2.50 eV depending on Ag content in the films. Urbach energy reversal in optical band gap indicates that several localized states are present above Fermi level or near at the conduction band. The optical properties, such as refractive index, optical conductivity and nonlinear optical susceptibility, are found dependent on Ag content. A combined effect on the transport properties has been observed with the incorporation of Ag in CdO. The metal-like electric conduction of CdO film has been removed up to a temperature T c for Ag doping. The n-type carrier concentration of CdO is reduced with increasing Ag content and the concentration is of the order of ~ 10 20 cm −3 .

Keywords

  • Thin films,
  • XRD,
  • Band gap,
  • Urbach tail,
  • Activation energy
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References

  1. Zhao et al. (2002) Electrical and optical properties of tin-doped CdO films deposited by atmospheric metal organic chemical vapor deposition (pp. 203-211) https://doi.org/10.1016/S0040-6090(02)00344-9
  2. Dhakel (2008) Influence of hydrogenation on the electrical and optical properties of CdO thin films https://doi.org/10.1088/0268-1242/23/5/055017
  3. Dhakel (2015) Development of electrical conduction with beryllium doping of CdO nanostructure thin films (pp. 222-227) https://doi.org/10.1590/1516-1439.301014
  4. Burbano et al. (2011) Sources of conductivity and doping limits in CdO from hybrid density functional theory (pp. 15065-15072) https://doi.org/10.1021/ja204639y
  5. Kammler et al. (2001) Comparison of thin film and bulk forms of the transparent conducting oxide solution Cd1+xIn2-2xSnxO4 https://doi.org/10.1063/1.1410882
  6. Mason et al. (2002) Defect chemistry and physical properties of transparent conducting oxides in the CdO–In2O3–SnO2 system (pp. 106-114) https://doi.org/10.1016/S0040-6090(02)00197-9
  7. Khan et al. (2010) Effect of Al-doping on optical and electrical properties of spray pyrolytic nano-crystalline CdO thin films 10(3) (pp. 790-796) https://doi.org/10.1016/j.cap.2009.09.016
  8. Dou et al. (1998) N-type doping in CdO ceramics: a study by EELS and photoemission spectroscopy 398(1-2) (pp. 241-258) https://doi.org/10.1016/S0039-6028(98)80028-9
  9. Dakhel (2008) Effect of thallium doping on the electrical and optical properties of CdO thin films (pp. 2704-2710) https://doi.org/10.1002/pssa.200723472
  10. Gupta et al. (2009) Preparation and characterization of highly conducting and transparent Al doped CdO thin films by pulsed laser deposition (pp. 673-677) https://doi.org/10.1016/j.cap.2008.06.004
  11. Karim et al. (2015) Structural and opto-electrical properties of pyrolized ZnO—CdO crystalline thin films 36(5) https://doi.org/10.1088/1674-4926/36/5/053001
  12. Karim et al. (2015) Study of the morphology, photoluminescence and photoconductivity of ZnO–CdO nanocrystals 2(3) https://doi.org/10.1088/2053-1591/2/3/036402
  13. Karim et al. (2016) Effect of Zn/Cd ratio on the optical constants and photoconductive gain of ZnO–CdO crystalline thin films (pp. 184-192) https://doi.org/10.1016/j.mssp.2015.08.037
  14. Ashaduzzman et al. (2018) Influence of chromium on structural, non-linear optical constants and transport properties of CdO thin films (pp. 135-144) https://doi.org/10.1016/j.surfin.2018.05.008
  15. Yan et al. (2006) Doping of ZnO by group-Ib elements https://doi.org/10.1063/1.2378404
  16. Hong-Liang et al. (2010) Study on the crystalline structure and the thermal stability of silver-oxide films deposited by using direct-current reactive magnetron sputtering methods (pp. 1176-1179) https://doi.org/10.3938/jkps.56.1176
  17. Jarzebski (1973) Pergamon Press
  18. Cullity and Stock (2001) Prentice Hall
  19. McKenna and Shluger (2009) The interaction of oxygen vacancies with grain boundaries in monoclinic HfO2 https://doi.org/10.1063/1.3271184
  20. Joakim et al. (2012) Oxygen vacancy segregation and space-charge effects in grain boundaries of dry and hydrated BaZrO3 https://doi.org/10.1063/1.3681169
  21. Klie et al. (2005) Enhanced current transport at grain boundaries in high-Tc superconductors https://doi.org/10.1038/nature03644
  22. Dhakel and Hamad (2012) Investigation on high carrier mobility in chromium incorporated CdO thin films on glass (pp. 25-33)
  23. Flores-Mendoza et al. (2013) Photoluminescence in undoped (CdO)1−x(InO3/2)x thin films at room temperature, 0 ≤ x ≤ 1 (pp. 133-138) https://doi.org/10.1016/j.jlumin.2012.10.030
  24. Urbach (1953) The long-wavelength edge of photographic sensitivity and of the electronic absorption of solids https://doi.org/10.1103/PhysRev.92.1324
  25. Abeles (1972) North-Holland
  26. Pankove (1975) Dover Publications Inc.
  27. Mahmoud and Al-Ghamdi (2010) Synthesis of CdZnO thin film as a potential candidate for optical switches (pp. 1134-1138) https://doi.org/10.1016/j.optlastec.2010.02.009
  28. Van-der-Pauw (1958) A method of measuring the resistivity and Hall coefficient on lamellae of arbitrary shape (pp. 220-224)