Author: Muhammed Husham1
1Physics Education Department, Faculty of Education, Tishk International University, Erbil, Iraq
Abstract: Nanocrystalline lead sulfide (PbS) thin films have been successfully deposited onto glass substrate via microwave assisted chemical bath deposition. Aqueous solutions of lead nitrate Pb(NO3) and thiourea [SC(NH2)2] were used as lead and sulfur ion sources respectively. Structural and morphological studies revealed a high synthesized nanocrystalline PbS thin films quality. Optical studies showed a significant blue shifting in the energy gap of the prepared nanocrystalline PbS thin films. Compared with bulk PbS, the prepared nanocrystalline PbS showed large energy gap, value of about 2.4 eV. This could be attributed to the confinement effect of nanocrystalline PbS thin films. The study introduced a simple and cost-effective method to further investigate other properties of nanocrystalline PbS thin films such as electrical and morphological properties.
Keywords: Nanocrystalline PbS Thin Films, Properties, Microwave CBD, Blue Shift, Energy Gap
Published: June 28, 2022
Banerjee, R., Jayakrishnan, R., & Ayyub, P. (2000). Effect of the size-induced structural transformation on the band gap in CdS nanoparticles. J. Phys.: Condens. Matter, 12 10647.
Butson, J.D., Narangari, P.R., Lysevych, M., WongLeung, J., Wan, Y., Karuturi, S. K., Tan, H.H., & Jagadish, C. (2019). InGaAsP as a promising narrow band gap semiconductor for photoelectrochemical water splitting. ACS Appl. Mater. Interfaces, 25236–25242.
Husham, M., Hamidon, M.N., Paiman, S., Abuelsamen, A.A., Farhat, O.F., & Al-Dulaimi, A.A. (2017). Synthesis of ZnO nanorods by microwave-assisted chemical-bath deposition for highly sensitive self-powered UV detection. Sensors and Actuators A, 263 166–173.
Husham, M., Hassan, Z., Selman, A.M., & Allam, N.K. (2015). Microwave-assisted chemical bath deposition of nanocrystalline CdS thin films with superior photodetection characteristics. Sensors and Actuators A, 230 9–16.
Nanda, J., Narayan, K.S., Kuruvilla, B.A., Murthy, G.L., & Sarma, D.D. (1998). Sizable photocurrent and emission from solid state devices based on CdS nanoparticles. Appl. Phys. Lett., 72 1335–1337.
Obaid, A.S., Hassan, Z., & Bououdina, M. (2012) Characterization of nanocrystalline PbS thin films prepared using microwave-assisted chemical bath deposition. Materials Science in Semiconductor Processing, 15 564-571.
Pitt, M. J. (1999). In Bretherick’s Handbook of Reactive Chemical Hazards 6th ed.; Urben, P. G. Ed.; Butterworth-Heinemann Ltd: Oxford, Vol. 2, pp 307-312.
Wang, Y., Liu, J., Wu, X., & Yang, B. (2014). Adhesion enhancement of indium tin oxide (ITO) coated quartz optical fibers. Appl. Surf. Sci, 308 341–346.
Yang, J., Elim, H.I., Zhang, Q., Lee, J.Y., & Ji, W. (2006). Rational synthesis, self-assembly, and optical properties of pbs-au heterogeneous nanostructures via preferential deposition. J. Am. Chem. Soc., 128, 11921-11926.