INFLUENCE OF CADMIUM SALTS ON A MODIFIED CHEMICAL BATH DEPOSITION OF CADMIUM SULFIDE THIN FILMS

X. B. Xu, S. Y. Huang, J. B. Chu, H. B. Zhu, Z. Sun, Y. W. Chen and S. M. Huang ()
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X. B. Xu: Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, East China Normal University, North Zhongshan Rd. 3663, Shanghai 200062, PR China
S. Y. Huang: Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, East China Normal University, North Zhongshan Rd. 3663, Shanghai 200062, PR China
J. B. Chu: Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, East China Normal University, North Zhongshan Rd. 3663, Shanghai 200062, PR China
H. B. Zhu: Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, East China Normal University, North Zhongshan Rd. 3663, Shanghai 200062, PR China
Z. Sun: Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, East China Normal University, North Zhongshan Rd. 3663, Shanghai 200062, PR China
Y. W. Chen: Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, East China Normal University, North Zhongshan Rd. 3663, Shanghai 200062, PR China
S. M. Huang: Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, East China Normal University, North Zhongshan Rd. 3663, Shanghai 200062, PR China

Surface Review and Letters (SRL), 2008, vol. 15, issue 03, 265-270

Abstract: A simply modified bath deposition technique has been successfully used to deposit uniformCdSthin films using cadmium chloride or cadmium acetate as the cadmium ion source, and thiourea as the sulfur source on glass substrates. Both the traditional magnetic agitation and the frequent substrate vibration by hand were done simultaneously during the deposition. Various properties of the deposited films such as surface morphology, crystallinity, and optical properties were investigated. The CdS films deposited from cadmium acetate show a good crystallinity and exhibit a preferential orientation along the hexagonal (002) direction. Their surface morphologies are more homogeneous with smaller grains than those from cadmium chloride. TheCdSfilms prepared from both cadmium ion sources present a high optical transmission (more than 80%) in the visible range with the band gap value of about 2.4 eV. The substrate vibration reduces the formation and residence of gas bubbles on the glass substrate during growth and resulted in deposition of CdS thin films with high quality. XRD, SEM, and UV–Vis measurements have provided the supported data. The fundamental CBD growth mechanisms involving different cadmium salts are discussed.

Keywords: Chemical bath deposition; cadmium sulfide; thin films; cadmium salt (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1142/S0218625X08011342

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