Effect of complexing agent on the properties of electrochemically deposited Cu2ZnSnS4 (CZTS) thin films

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The Cu2ZnSnS4 (CZTS) thin films have been electrochemically deposited on Mo-coated glass substrate from weak acidic medium (pH 4.5-5) at room temperature. The effect of complexing agent (tri-sodium citrate) on the structural, morphological and compositional properties of CZTS thin films has been investigated. The as-deposited and annealed thin films were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM),EDAX and X-ray photoelectron spectroscopy (XPS) techniques for their structural, morphological, compositional and chemical properties, respectively. XRD studies reveal that the amorphous nature of as-deposited thin film changes into polycrystalline with kesterite crystal structure after annealing in Ar atmosphere. The film prepared without complexing agent showed well-covered surface morphology on the substrate with some cracks on the surface of the film whereas those prepared using complexing agent, exhibited uneven and slightly porous and some overgrown particles on the surface of the films. After annealing, morphology changes into the flat grains, uniformly distributed over the entire surface of the substrate. The EDAX and XPS study reveals that the films deposited using 0.2 M tri-sodium citrate are nearly stoichiometric. (C) 2010 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2010-12
Language
English
Article Type
Article
Keywords

ZN-SN PRECURSORS; OPTICAL-PROPERTIES; ELECTRODEPOSITION; SULFURIZATION; NANOCRYSTALS; FABRICATION; EDTA

Citation

APPLIED SURFACE SCIENCE, v.257, no.5, pp.1786 - 1791

ISSN
0169-4332
DOI
10.1016/j.apsusc.2010.09.016
URI
http://hdl.handle.net/10203/93589
Appears in Collection
RIMS Journal Papers
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