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Electronic and optical properties of Cd1-xZnxS nanocrystals

  • N. SaftaEmail author
  • A. Sakly
  • H. Mejri
  • Y. Bouazra
Solid and Condensed State Physics

Abstract.

We report a numerical simulation of the conduction and valence band edges of Cd1-xZnxS nanocrystallites using a one — dimensional potential model. Electron — hole pairs are assumed to be confined in nanospheres of finite barrier heights. Optical absorption measurements are used to fit the bandgap of the Cd1-xZnxS nanocrystal material. A theoretical analysis is also made to calculate the energy location of bound excitons and the oscillator strength of interband transitions as a function of zinc composition. The aim of the latter study is to investigate the optical behavior of Cd1-xZnxS nanocrystals. An attempt to explain all the results is presented.

PACS.

73.21.La Quantum dots 73.22.-f Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals 71.55.Gs II-VI semiconductors 

References

  1. K.K. Nanda, S.N. Sarangi, S. Mohanty, S.N. Sahu, Thin Solid Films 322, 21 (1998) CrossRefADSGoogle Scholar
  2. Al.L. Efros, A.L. Efros, Sov. Phys. Semiconduc. 16, 722 (1982) Google Scholar
  3. L.E. Brus, J. Phys. Chem. 90, 2555 (1986) CrossRefGoogle Scholar
  4. A. Schmitt-Rink, D.A.B. Miller, D.S. Chelma, Phys. Rev. B 35, 8113 (1987) CrossRefADSGoogle Scholar
  5. Y. Kayanuma, Phys. Rev. B 38, 7997 (1988) CrossRefGoogle Scholar
  6. L.E. Brus, Nanostruc. Mater. 1, 71 (1992) CrossRefGoogle Scholar
  7. B. Bhattacharjee, S.K. Mandal, K. Chakrabarti, D. Ganguli, S. Chaudhui, J. Phys. D: Appl. Phys. 35, 2636 (2002) CrossRefADSGoogle Scholar
  8. V. Alberts, R. Herberhonz, T. Walter, H.W. Scock, J. Phys. D: Appl. Phys. 30, 2156 (1997) CrossRefADSGoogle Scholar
  9. N. Kohara, T. Negami, M. Nishitani, T. Wada, Jpn J. Appl. Phys 34, L 1141 Google Scholar
  10. H.L. Kwok, J. Phys. D: Appl. Phys. 16, 2367 (1983) CrossRefADSGoogle Scholar
  11. H.S. Kim, H.B. Im, J.T. Moon, Thin Solid Films 214, 207 (1992) CrossRefADSGoogle Scholar
  12. G. Gordillo, Solar Energy Mater, Solar Cells 25, 41 (1992) CrossRefGoogle Scholar
  13. J.W. Bowron, S.D. Damaskinos, A.E. Dixon, Solar cells 31, 159 (1991) CrossRefADSGoogle Scholar
  14. O.M. Hussain, P.S. Reddy, B.S. Naidu, U. Uthanna, P.J. Reddy, Semicond. Sci. Technol. 6, 690 (1991) CrossRefADSGoogle Scholar
  15. T.L. Chu, S.S. Chu, J. Britt, C. Feredikes, C.Q. Wu, J. Appl. Phys. 70, 2688 (1991) CrossRefADSGoogle Scholar
  16. M.C. Klein, F. Hache, D. Ricard, C. Flytzanis, Phys. Rev. B 42, 11123 (1990) CrossRefADSGoogle Scholar
  17. A.L. Efros, Sov. Phys. Semicond 16, 772 (1992) Google Scholar
  18. R.L. Greene, K.K. Bajaj, Solid State Commun. 45, 831 (1983); R.L. Greene, K.K. Bajaj, D.E. Phelps, Phys. Rev. B 29, 1807 (1984) CrossRefADSGoogle Scholar
  19. G. Bastard, E.E. Mendez, L.L. Chang, L. Esaki, Phys. Rev. B 26, 1974 (1982) CrossRefADSGoogle Scholar
  20. H. Mathieu, Physique des semi-conducteurs et des composants électroniques (Masson, Paris, 1987, 1990) Google Scholar
  21. G.K. Padam, G.L. Mahotra, S.U.M. Rao, J. Appl. Phys. 63, 770 (1988) CrossRefADSGoogle Scholar
  22. H. Yükselici, P.D. Persans, T.M. Hayes, Phys. Rev. B 52, 11763 (1995) CrossRefADSGoogle Scholar
  23. W.Q. Chen, T.G. Andersson, J. Appl. Phys. 73, 4484 (1993) CrossRefADSGoogle Scholar

Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Authors and Affiliations

  1. 1.Laboratoire de Physique des Semi-conducteurs et des Composants Électroniques, Faculté des SciencesMonastirTunisia
  2. 2.Unité de Physique Quantique, Faculté des SciencesMonastirTunisia
  3. 3.École Préparatoire aux Académies Militaires, Avenue Maréchal TitoSousseTunisia

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