Structural and optical properties of PbS thin films grown by chemical bath deposition
- Laboratoire de Physique de la Matiere Condensee, Faculte des Sciences de Tunis (2092) El Manar, Tunisie (Tunisia)
- Institut d'Electronique du Sud, UMR 5814, CNRS, Universite Montpellier Place Eugene Bataillon--CC082--34095 Montpellier cedex (France)
- Laboratoire de Physique de la Matiere Condensee, Faculte des Sciences d'Amiens, 33 rue Saint-Leu, 80039 Amiens (France)
Lead sulphide thin films are grown on glass substrates at various deposition times tD, in the range of 40-60 min per step of 2 min, using the chemical bath deposition technique. X-ray diffraction and atomic force microscopy are used to characterize the film structure. The surface composition is analysed by Auger electron spectroscopy. It appears that the as-prepared thin films are polycrystalline with cubic structure. Nanometric scale crystallites are uniformly distributed on the surface. They exhibit almost a stoechiometric composition with a [Pb]/[S] ratio equal to 1.10. Optical properties are studied in the range of 300-3300 nm by spectrophotometric measurements. Analysis of the optical absorption data of lead sulphide thin layers reveals a narrow optical direct band gap equal to 0.46 eV for the layer corresponding to a deposition time equal to 60 min.
- OSTI ID:
- 21035872
- Journal Information:
- AIP Conference Proceedings, Vol. 935, Issue 1; Conference: ISC 2007: 2. international spectroscopy conference, Sousse (Tunisia), 25-28 Mar 2007; Other Information: DOI: 10.1063/1.2795405; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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