Optical, Morphological and Electrical Properties of PBS Thin Films Prepared by Chemical Bath Deposition (CBD) Technique at Different Deposition Time
Author(s)
Abubakar Muhammad Ramalan , Yusuf A. S , Samson Damilola , Abdul Dahiru Ardo Buba ,
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Abstract
Lead sulphide (PBS) thin films have been investigated in this present work by using chemical bath deposition (CBD) technique onto glass substrates with different deposition times (20, 40 and 60 min.) at 70oC (158oF) exploiting lead nitrate and thiourea as lead and sulphide ions sources. The effect of the deposition time on the optical, morphological and electrical properties of the as-deposited PBS films were studied. The thin films exhibit a strong optical absorption in the ultraviolet (UV) and visible regions but low absorption over the longer wavelength region towards near infrared (NIR) of the electromagnetic spectrum. In contrast, the films transmit very low at the UV and visible regions while NIR region exhibit a good optical transmission. The optical band gap energy of the films decreases with increase in deposition time ( ), ascribing larger particle size. The extinction coefficient (k) of the films increased with deposition time increment which corresponds to greater attenuation of light and also the higher probability of raising the electron transfer across the mobility gap with the photon energy. The image obtained shows almost dense spherical and uniform grains with an increase in time of dipping the glass slides into the solution. The electrical conductivity was observed to be inversely related to the optical band gap energy of the films
Keywords
PbS, CBD, UV, NIR, Thin films
References
i. Aadim, K. A., Ibrahim, A. -M., & Marie, J. M. (2017). Structural and Optical Properties of PbS Thin Films Deposited by Pulsed Laser Deposited (PLD) Technique at Different AnnealingTemperature. International Journal of Physics, 5(1), 1-8. doi:10.12691/ijp-5-1-1
ii. Abbas, M. M., Shehab, A. A.-M., Hassan, N.-A., & Al-Samuraee, A.-K. (2011). Effect of temperature and deposition time on the optical properties of chemically deposited nanostructure PbS thin films. Thin Solid Films, 519, 4917–4922.
iii. Ahmed, S. S., Hassan, E. K., & Emad, F. (2013). PbS nano thin film photoconductor. International Journal of Physics and Research (IJPR), 3(3), 21-26.
iv. Cheng, S., Chen, Y., Huang, C., Chen, G. (2006). Characterization of SnS films prepared by constant-current electro-deposition. Thin Solid Films, 500, 96–100.
v. Ezekoye, B. A., Emeakaroha, T. M., Ezekoye, V. A., Ighodalo, K. O., & Offor, P. O. (2015). Optical and structural properties of lead sulphide (PbS) thin films synthesized by chemical method. International Journal of Physical Sciences, 10(13), 385-390.
vi. Ezema, F. I., Ekwealor, A. B., & Osuji, R. U. (2007). Optical properties of chemical bath deposited nickel oxide (NiO )thin films. Journal of Optoelectronics and Advanced Materials, 9, 898–1903.
vii. Göde, F., Gümüs, C. (2009). Influences of copper and manganese concentrations on the properties of polycrystalline ZnS:Cu and ZnS:Mn thin films. Journal of Optoelectronics and Advanced Materials, 11(4), 429 - 436.
viii. Göde, F., Güneri, E., Emen, F. M., EmirKafadar, V., & Ünlü, S. (2014). Synthesis, structural, optical, electrical and thermoluminescence properties of chemically deposited PbS thin films. Journal of Luminescence, 147, 41–48.
ix. Gülen, Y. (2014). Characteristics of Ba-Doped PbS Thin Films Prepared by the SILAR Method. Acta Physica Polonica A, 126, 763-767. doi:10.12693/APhysPolA.126.763
x. Jana, S., Thapa, R., Maity, R., & Chattopadhyay, K. K. (2008). Optical and dielectric properties of PVA capped nanocrystalline PbS thin films synthesized by chemical bath deposition. Physica E, 40, 3121– 3126.
xi. Kamal, U. A. (2010). Preparation and Characterization of II-VI SemiconductorThin Film by Spray Pyrolysis. Dhaka, Bangladesh: Bangladesh University of Engineering & Technology.
xii. Kumara, D., Agarwal, G., Tripathi, B., Vyas, D., & Kulshrestha, V. (2009). Characterization of PbS nanoparticles synthesized by chemical bathdeposition. Journal of Alloys and Compounds, 484, 463-466.
xiii. Mosiori, C. O., Njoroge, W. N., & Okumu, J. (2014). Optical and Electrical Properties of Pbs Thin Films Grown by Chemically Bath Deposition [CBD] at Different Lead Concentrations. International Journal of Advanced Research in Physical Science, 1(1), 25-32.
xiv. Obaid, A. S., Mahdi, M. A., Dihe, A. A., & Hassan, Z. (2012). Effect of Deposition Time on the PbS Thinfilms Prepared using Microwave-Assisted Chemical Bath Deposition: Structure andOptical Characterization. International Conference on Education, Applied Sciences and Management (oju ewe 86 - 89). Dubai, UAE: ICEASM.
xv. Obaid, A. S., Mahdi, M. A., Yusof, Y., Bououdina, M., & Hassan, Z. (2013). Structural and optical properties of nanocrystalline lead sulfide thin films prepared by microwave-assisted chemical bath deposition. Materials Science in Semiconductor Processing, 16, 971–979.
xvi. Osherov, A., Ezersky, V., & Golan, Y. (2007). The role of solutioncomposition in chemical bath deposition of epitaxial thin films of PbSon GaAs (100). Journal Crystal Growth, 308, 334–339. doi:10.1016/j.jcrysgro.2007.07.046
xvii. Pawar, S. B., Pawar, S. A., Patil, P. S., & Bhosale, P. N. (2013). Chemosynthesis ofPbS thin film by SILAR technique. AIP Conf. Proc., 1536, 483-484. doi:10.1063/1.4810311
xviii. Preetha, K. C., Deepa, K., Dhanya, A. C., & Remadevi, T. L. (2015). Role ofcomplexing agents on chemical bath deposited PbS thin filmcharacterization. Material Science and Engineering, 73(012086), 1-5. doi:10.1088/1757-899X/73/1/012086
xix. Rafa, M. A., & Rousdy, N. (2010). Study of optical properties of nanostructuredPbS films. Journal of Philosophical Magazine Letters, 90(2), 113-120.
xx. Rajashree, C., Balu, A. R., & Nagarethinam, V. S. (2014). Substrate temperatureeffect on the Physical properties of Spray deposited Lead sulfide thinfilms suitable for solar control coatings. International Journal of ChemTech Research, 6, 347-360.
xxi. Thirumavalavan, S., Mani, K., & Suresh, S. (2015). Investigation on Structural, Optical, Morphological and Electrical Properties of Lead Sulphide (PbS) Thin Films. Journal of Ovonic Research, 11(3), 123 - 130.
xxii. Uhuegbu, C. C. (2011). Growth and Characterization of Lead Sulphide Thin Film for Solar Cell Fabrication. Canadian Journal on Scientific and Industrial Research, 2(6), 230 - 240.
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