Bulletin of Materials Science

, Volume 17, Issue 5, pp 455–463 | Cite as

Preparation and properties of (CdS)x-(PbS)1 −x thin-film composites

  • L P Deshmukh
  • B M More
  • S G Holikatti
  • P P Hankare
Special Section On Porous Silicon

Abstract

A modified chemical deposition process is employed for the preparation of thin-film (CdS)x-(PbS)1 −x composites with 0·2 ≤x ≤ 0·8. Cadmium sulphate, lead acetate and thiourea are used as the basic source materials. The electrical conductivity is found to decrease with increasing composition parameterx up to 0·5 and increase for further increase inx. The composites are polycrystalline as is revealed from XRD and microscopic observations and show phases of both cubic and hexagonal CdS, cubic CdO and PbS, and tetragonal PbO and PbO2. Additional peaks of free elemental Cd and S have also been observed. For all the phases no significant variation in lattice parameters withx has been observed. The optical absorption studies show the presence of four well-defined absorption edges at approximately 0·45 eV, 1·05eV, 1·80 eV and 2·35 eV, at the same energies for allx values. The absorption coefficient is of the order of 104 cm−1 and mode of band-to-band transition is of the direct type.

Keywords

Chemical deposition process (CdS)x-(PbS)1 −x 

References

  1. Bube R H 1960Photoconductivity of solids (New York: Wiley) p. 95Google Scholar
  2. Chopra K L, Kainthala R C, Pandya D K and Thakoor A P 1982Physics of thin films (eds) G Hasset al, (New York: Academic Press) Vol. 12 p. 201Google Scholar
  3. Deshmukh L P and More B M 1993Proc. int. conf. on energy, environment and electrochemistry (Karaikudi) p. 57Google Scholar
  4. Deshmukh L P, Palwe A B and Sawant V S 1990Solar Cells 28 1; also in 1990Solar Energy Mat. 20 341CrossRefGoogle Scholar
  5. Deshmukh L P, Zipre K V, Rane B P, Palwe A B, Hankare P P and Manikshete A H 1992Solar Energy Mat. Solar Cells 28 249CrossRefGoogle Scholar
  6. Gordillo G 1985Solar Cells 14 210CrossRefGoogle Scholar
  7. Hall R B, Birkmire R W, Phillips J E and Meaking J D 1981Proc. 15th IEEE photovoltaic spec. conf. (Orlando) p. 777Google Scholar
  8. Hauser O 1910Chem. Z. 34 1079Google Scholar
  9. Martinuzzi S, Sarti D, Vassilersky D and Zapien F 1980Solar Cells 2 173CrossRefGoogle Scholar
  10. Morris G C and Vanderveen R 1992Solar Energy Mat. Solar Cells 26 217CrossRefGoogle Scholar
  11. Nair P K, Nair M T S, Fernandez A and Ocampo M 1989J. Phys. D: Appl. Phys. 22 829CrossRefGoogle Scholar
  12. Nair P K, Ocampo M, Fernandez A, and Nair M T S 1990Solar Energy Mat. 20 235CrossRefGoogle Scholar
  13. Razykov T M 1988Thin Solid Films 164 301CrossRefGoogle Scholar
  14. Rodriguez J A and Gordillo G 1989Solar Energy Mat. 19 421CrossRefGoogle Scholar
  15. Reddy G B, Pandya D K and Chopra K L 1987Solar Energy Mat. 15 383CrossRefGoogle Scholar
  16. Sood A K, Wu K and Zemel J N 1978Thin Solid Films 48 73CrossRefGoogle Scholar

Copyright information

© the Indian Academy of Sciences 1994

Authors and Affiliations

  • L P Deshmukh
    • 1
  • B M More
    • 1
  • S G Holikatti
    • 1
  • P P Hankare
    • 1
  1. 1.Department of Physics, University Centre for P.G. StudiesShivaji UniversitySolapurIndia

Personalised recommendations