EFFECT OF VARYING pH ON THE OPTICAL AND ELECTRICAL PROPERTIES OF ELECTRODEPOSITED ZnS THIN FILMS.
DOI:
https://doi.org/10.60787/tnamp-19-141-146Keywords:
ZnS, pH, Energy bandgap, UV-Visible spectrometryAbstract
The effect of varying pH on the optical and electrical properties of electrodeposited ZnS has been studied. The electrical parameter were studied using the Photoelectrochemical (PEC) cell while the optical parameters were studied using the UV-Visible spectrophotometry technique for wavelength range 400 – 1900 nm. Visual examination revealed that the colour of the ZnS thin films became lighter as the pH reduced. High transmittance, which decreases with increase in the pH were observed at the visible and near infrared regions. The values of the energy bandgaps decreases as the pH values decrease, an indication that the transmittance of the ZnS thin film decreased with decreased pH. The average current density and thickness of the thin films decreased with increasing pH while the thin films were all p-type in electrical conductivity which shows that variation in the pH did not have any significant effect on the conductivity type of the films.
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References
López, M. C., Espinos, J. P., Martín, F., Leinen, D., and Ramos-Barrado, J. R. (2005). Growth of ZnS thin films obtained by chemical spray pyrolysis: The influence of precursors. Journal of Crystal Growth, 285(1–2), 66–75. https://doi.org/10.1016/j.jcrysgro.2005.07.050
Madugu, M. L., Olusola, O. I. O., Echendu, O. K., Kadem, B., and Dharmadasa, I. M. (2016). Intrinsic Doping in Electrodeposited ZnS Thin Films for Application in Large-Area Optoelectronic Devices. Journal of Electronic Materials, 45(6), 2710–2717. https://doi.or
Cheng, J., Fan, D., Wang, H., Liu, B., YongCai, Z., and Hui, Y. (2017). Chemical Bath deposition of crystalline ZnS Thin Films. Chemical Bath Deposition of Crystalline Cu4SnS4 Thin Films. https://doi.org/10.4172/978-1-63278-006-5-007
Ong, H. C., and Chang, R. P. H. (2001). Optical constants of wurtzite ZnS thin films determined by spectroscopic ellipsometry. Applied Physics Letters, 79(22), 3612–3614. https://doi.org/10.1063/1.1419229.
Sinha, T., Lilhare, D., and Khare, A. (2018). Effects of Various Parameters on Structural and Optical Properties of CBD-Grown ZnS Thin Films: A Review. Journal of Electronic Materials, 47(2), 1730–1751. https://doi.org/10.1007/s11664-017-5876-z.
Leftheriotis, G., Yianoulis, P., and Patrikios, D. (1997). Deposition and optical properties of optimised ZnS/Ag/ZnS thin films for energy saving applications. Thin Solid Films, 306(1), 92–99. https://doi.org/10.1016/S0040-6090(97)00250-2
Wei, A., Liu, J., Zhuang, M., and Zhao, Y. (2013). Preparation and characterization of ZnS thin films prepared by chemical bath deposition. Materials Science in Semiconductor Processing, 16(6), 1478–1484. https://doi.org/10.1016/j.mssp.2013.03.016.
Elidrissi, B., Addou, M., Regragui, M., Bougrine, A., Kachouane, A., and Bernède, J. C. (2001). Structure, composition and optical properties of ZnS thin films prepared by spray pyrolysis. Materials Chemistry and Physics, 68(1–3), 175–179. https://doi.org/10.1016/S0254-0584(00)00351-5
Roy, P., Ota, J. R., and Srivastava, S. K. (2006). Crystalline ZnS thin films by chemical bath deposition method and its characterization. Thin Solid Films, 515(4), 1912–1917. https://doi.org/10.1016/j.tsf.2006.07.035
Afifi, H. H., Mahmoud, S. A., and Ashour, A. (1995). Structural study of ZnS thin films prepared by spray pyrolysis. Thin Solid Films, 263(2), 248–251. https://doi.org/10.1016/0040-6090(95)06565-2
Göde, F. (2011). Annealing temperature effect on the structural, optical and electrical properties of ZnS thin films. Physica B: Condensed Matter, 406(9), 1653–1659. https://doi.org/10.1016/j.physb.2010.12.033
Long, F., Wang, W. M., Cui, Z. kui, Fan, L. Z., Zou, Z. guang, and Jia, T. kun. (2008). An improved method for chemical bath deposition of ZnS thin films. Chemical Physics Letters, 462(1–3), 84–87. https://doi.org/10.1016/j.cplett.2008.07.064
g/10.1007/s11664-015-4310-7
Qi, L., Mao, G., and Ao, J. (2008). Chemical bath-deposited ZnS thin films: Preparation and characterization. Applied Surface Science, 254(18), 5711–5714. https://doi.org/10.1016/j.apsusc.2008.03.059
Hwang, D. H., Ahn, J. H., Hui, K. N., Hui, K. S., and Son, Y. G. (2012). Structural and optical properties of ZnS thin films deposited by RF magnetron sputtering. Nanoscale Research Express, 7:26 http://www.nanoscalereslett.com/content/7/1/2
Sinha, T., Lilhare, D and Khare, A. (2017). Effects of various parameters on the structural and optical properties of CBD-grown ZnS thin films: A review. Journal of Electronic MaterialsDOI: 10.1007/s11664-017-5876-z
Antony, A., Murali, K. V., Manoj, R., and Jayaraj, M. K. (2005). The effect of the pH value on the growth and properties of chemical-bath-deposited ZnS thin films. Materials Chemistry and Physics, 90(1), 106–110. https://doi.org/10.1016/j.matchemphys.2004.10.017
Nasr, T., Kamoun, N., Kanzari, M., and Bennaceur, R. (2006). Effect of pH on the properties of ZnS thin films grown by chemical bath deposition. Thin Solid Films, 500(1–2), 4–8. https://doi.org/10.1016/j.tsf.2005.11.030
Göde, F., Gümüş, C., and Zor, M. (2007). Investigations on the physical properties of the polycrystalline ZnS thin films deposited by the chemical bath deposition method. Journal of Crystal Growth, 299(1), 136–141. https://doi.org/10.1016/j.jcrysgro.2006.10.26
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