Effects of pH Value on Performance of CdS Films with Chemical Bath Deposition

Abstract:

CdS thin films were prepared by chemical-bath deposition (CBD) from a bath containing thiourea, acetic cadmium, ammonia and ammonium acetate in aqueous solution onto glass substrates at 80°C with stirring. The influence of pH value on the surface morphology and optical properties of the CdS thin films was investigated. Step height measurement instrument, scanning electron microscopy (SEM), X-ray diffraction (XRD), spectrophotometer and digital four-point probe resistance measurement were used to characterize their thickness, surface morphology, crystal structure, electrical and optical properties. Uniform CdS thin films were obtained when pH=11.6. There are obvious diffraction peaks at 26.04° when pH is 11.6. The transmittance increases as the pH values increase. The experiment show that pH value play a vital role in the properties of the CdS thin films.

• Periodical: Advanced Materials Research (Volumes 557-559)
• Pages: 1941-1944
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.557-559.1941
• Online since: July 2012
• Authors: Li Mei Zhou, Xiao Fei Hu, Su Mei Wu
• Keywords: CdS Thin Film, Chemical Bath Deposition (CBD), pH Value, Solar Cell

References

[1] Vigil O, Zeleya-Angel O and Rodriguez Y Semicond. Sci. Technol. 15 (2000), p.259

[2] Mahanty S, Basak D, Rueda F and Leon M J. Electron Mater. 28 (1999), p.559

[3] Y. Bharath Kumar Reddy, V. Sundara Raja. Sol. Energy Mater. Sol. Cells 90 (2006), p.1656

[4] Reddy Y. K. and Raja V. S., . Semicond. Sci. Technol.19(2004), p.1015