On the structure, morphology, and optical properties of chemical bath deposited Sb2S3 thin films

In the present paper, we have reported the room temperature growth of antimony sulphide (Sb2S3) thin films by chemical bath deposition and detailed characterization of these films. The films were deposited from a chemical bath containing SbCl3 and Na2S2O3 at 27 deg C. We have analysed the structure,...

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Bibliographic Details
Published in:	Applied surface science 2008-03, Vol.254 (10), p.3200-3206
Main Authors:	KRISHNAN, B, ARATO, A, CARDENAS, E, DAS ROY, T. K, CASTILLO, G. A
Format:	Article
Language:	eng
Subjects:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Methods of deposition of films and coatings film growth and epitaxy Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity) Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optical properties of bulk materials and thin films Physics Single-crystal and powder diffraction Structure and morphology thickness Structure of solids and liquids crystallography Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) Thin film structure and morphology X-ray diffraction and scattering
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Summary:	In the present paper, we have reported the room temperature growth of antimony sulphide (Sb2S3) thin films by chemical bath deposition and detailed characterization of these films. The films were deposited from a chemical bath containing SbCl3 and Na2S2O3 at 27 deg C. We have analysed the structure, morphology, composition and optical properties of as deposited Sb2S3 films as well as those subjected to annealing in nitrogen atmosphere or in air. As-deposited films are amorphous to X-ray diffraction (XRD). However, the diffused rings in the electron diffraction pattern revealed the existence of nanocrystalline grains in these films. XRD analysis showed that upon annealing in nitrogen atmosphere these films transformed into polycrystalline with orthorhombic structure. Also, we have observed that during heating in air, Sb2S3 first converts into orthorhombic form and then further heating results in the formation of Sb2O3 crystallites. Optical bandgap energy of as deposited and annealed films was evaluated from UV-vis absorption spectra. The values obtained were 2.57 and 1.73eV for the as-deposited and the annealed films respectively.
ISSN:	0169-4332 1873-5584