Influence of growth temperature and silver to sulfur molar ratios on optical, electrical and thermoelectrical properties of nanostructured Ag2S thin films



Silver sulfide (Ag2S) thin films have been deposited onto glass substrates using spray pyrolysis technique. The substrate temperature (260–310 °C) and also Ag to S molar ratio (0.33 and 0.43) dependent structural, morphological, optical, electrical and thermoelectrical properties of samples have been studied. The X-ray diffraction studies showed that the samples have single acanthite (α-Ag2S) phase with monoclinic structure and preferred orientation change from \((\bar{1}12)\) to \((\bar{1}03)\) plan with increasing sulfur content. SEM and AFM analyses revealed a compact surface morphology with slightly rough surface. Optical measurements showed a relatively high absorption coefficient (∼5 × 104–6 × 105 cm−1) in the visible range, with an effective optical band gap of ∼2.01–2.23 eV. The electrical studies showed that all these samples have an n-type conductivity and the free electron density increases with increasing the substrate temperature, in agreement with the reflectance spectra of the layers. The thermoelectric measurements revealed that the maximum Seebeck coefficient of −198 μV/K (at T = 400 K) was obtained for Ag2S (Ag:S = 0.33 at.%) film at substrate temperature of 310 °C.


Substrate Temperature Thermoelectrical Property Seebeck Coefficient Ag2S Band Tail 


  1. 1.
    K. Sahraoui, N. Benramdane, M. Khadraoui, R. Miloua, C. Mathieu, Sens. Transducers 27, 319 (2014)Google Scholar
  2. 2.
    U.M. Jadhav, S.R. Gosavi, S.N. Patel, R.S. Patil, Arch. Phys. Res. 2, 27 (2011)Google Scholar
  3. 3.
    M.M. El-Nahass, A.A.M. Farag, E.M. Ibrahim, S. Abd-El-Rahman, Instrum. Sci. Technol. 72, 453 (2004)Google Scholar
  4. 4.
    T. Ben Nasrallah, H. Dlala, M. Amlouk, S. Belgacem, J.C. Bern`ede, Synth. Met. 151, 225 (2005)CrossRefGoogle Scholar
  5. 5.
    R. Boughalmi, A. Boukhachem, I. Gaied, K. Boubaker, M. Bouhafs, M. Amlouk, Mater. Sci. Semicond. Process. 16, 1584 (2013)CrossRefGoogle Scholar
  6. 6.
    I.C. Lekshmi, G. Berera, Y. Afsar, G.X. Miao, T. Nagahama, T. Santos, J.S. Moodera, J. Appl. Phys. 103, 093719 (2008)CrossRefGoogle Scholar
  7. 7.
    A.N. Rodrıguez, M.T.S. Nair, P.K. Nair, Semicond. Sci. Technol. 20, 576 (2005)CrossRefGoogle Scholar
  8. 8.
    H.M. Pathan, P.V. Salunkhe, B.R. Sankapal, C.D. Lokhande, Mater. Chem. Phys. 72, 105 (2001)CrossRefGoogle Scholar
  9. 9.
    B.R. Sankapal, R.S. Mane, C.D. Lokhande, Mater. Chem. Phys. 63, 226 (2000)CrossRefGoogle Scholar
  10. 10.
    M. Chen, Y. Xie, H.Y. Chen, Z.P. Qiao, Y.T. Qian, J. Colloid Interface Sci. 237, 47 (2001)CrossRefGoogle Scholar
  11. 11.
    N.N. Abdulzadeh, N.N. Mursakulov, R.G. Ahmedsadeh, TPE-06 3rd International Conference on Technical and Physical Problems in Power Engineering, (2006)Google Scholar
  12. 12.
    A.V. Ditman, I.N. Kulikova, Fizica Tverdogo Tela 19(8), 1397 (1977)Google Scholar
  13. 13.
    M.H. Hebb, J. Chem. Phys. 20, 185 (1952)CrossRefGoogle Scholar
  14. 14.
    L.J. Van der Pauw, Philips Res. Rep. 13, 1 (1958)Google Scholar
  15. 15.
    P.K. Manoj, B. Joseph, V.K. Vaidyan, D. Sumangala Devi Amma, Ceram. Int. 33, 273 (2007)CrossRefGoogle Scholar
  16. 16.
    M. Bouaziz, M. Amlouk, S. Belgacem, Thin Solid Films 517, 2527 (2009)CrossRefGoogle Scholar
  17. 17.
    E. Burstein, Phys. Rev. 93, 632 (1954)CrossRefGoogle Scholar
  18. 18.
    T.S. Moss, Proc. Phys. Soc. Lond. Ser. B 67, 775 (1954)CrossRefGoogle Scholar
  19. 19.
    J.I. Pankove, Phys. Rev. A 140, 2059 (1965)CrossRefGoogle Scholar
  20. 20.
    U.M. Jadhav, S.N. Patel, R.S. Patil, Res. J. Chem. Sci. 3, 69 (2013)Google Scholar
  21. 21.
    P.E. Agbo, P.A. Nwofe, Int. J. Thin Films Sci. Technol. 9, 12 (2015)Google Scholar
  22. 22.
    S. Miyatani, J. Phys. Soc. Jpn. 10, 786 (1955)CrossRefGoogle Scholar
  23. 23.
    P.S. Patil, L.D. Kadam, Appl. Surf. Sci. 199, 211 (2002)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.School of PhysicsDamghan UniversityDamghanIran

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