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Effect of Molarity on Structural and Optical Properties of Chemically Deposited Nanocrystalline PbS Thin Film

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Thin films of PbS were deposited by chemical bath deposition (CBD) method under various molarities using lead acetate as Pb2+ ion source, thiourea as S2- ion source and ammonia as complexing agent at a fixed pH value of 9 under bath temperature of 333 K. Four different molarities of PbS thin films were prepared. The as-prepared films were characterized by using X-ray diffraction (XRD), X-ray fluorescence (XRF), EDX, field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM). Parameters like crystallite size, lattice constant, microstrain, dislocation density were calculated. Optical constants such as extinction coefficient, absorption coefficient were measured from absorption spectra. Studies show that average nanocrystallite size increases from14.2 nm to 18.1 nm as the molarity of the film increases. Optical studies reveal the decrease of band gap from 1.75 eV to 1.44 eV with increasing molarity of the film indicating higher electrical conductivity of the films.


International Letters of Chemistry, Physics and Astronomy (Volume 74)
M. P. Sarma and G. Wary, "Effect of Molarity on Structural and Optical Properties of Chemically Deposited Nanocrystalline PbS Thin Film", International Letters of Chemistry, Physics and Astronomy, Vol. 74, pp. 22-35, 2017
Online since:
June 2017

[1] H. Kanazawa, S. Adachi, Optical properties of PbS, J. Appl. Phys. 83(11) (1998) 5997-6001.

[2] J.L. Machol et al., Vibronic quantum beats in PbS microcrystallites, Physical Review B: Condensed Matter. 48(4) (1993) 2819-2822.


[3] P. Gadenne, Y. Yagil, G. Deutscher, Transmittance and reflectance in situ measurements of semicontinuous gold films during deposition, J. Appl. Phys. 66(7) (1989) 3019-3025.


[4] P.K. Nair, O. Gomezdaza, M.T.S. Nair, Metal sulphide thin film photography with lead sulphide thin films, Adv. Mater. Opt. Electron. 1 (1992) 139-145.


[5] H. Hirata, K. Higashiyama, Analytical study of the lead ion-selective ceramic membrane electrode, Bulletin of the chemical society of Japan. 44(9) (1971) 2420-2423.


[6] T.K. Chaudhuri, S. Chatterjes, Design of a thin film solar thermoelectric generator, Proceedings of the International Conference on Thermoelectronics, Texas, 1992, vol. 11, p.40.

[7] D.L. Partin et al., Handbook on semiconductors, Amsterdam, Elsevier, (1994).

[8] M. Sharon et al., Electrodeposition of lead sulphide in acidic medium, Journal of Electroanalytical Chemistry. 436(1) (1997) 49-52.

[9] B. Thangaraju, P. Kaliannan, Spray pyrolytically deposited PbS thin films, Semiconductor science and technology. 15(8) (2000) 843-849.


[10] V.I. Levchenko et al., Heteroepitaxy of PbS on porous silicon, Thin Solid Films. 348(1) (1999) 141-144.


[11] M.M. Abbas et al., Effect of deposition time on the optical characteristics of chemically deposited nanostructure PbS thin films, Energy Procedia. 6 (2011) 241-250.


[12] S. Seghaier et al., Structural and optical properties of PbS thin films deposited by chemical bath deposition, Mat. Chem. Phys. 97 (2006) 71-80.


[13] F. Gode et al., Synthesis, structural, optical, electrical and thermoluminescence properties of chemically deposited PbS thin films, Journal of Luminescence. 147 (2014) 41-48.


[14] B.D. Cullity, Elements of X-ray diffraction, Addison-Wesley publishing co., Inc, London, (1978).

[15] J.B. Nelson, D.P. Riley, An experimental investigation of extrapolation methods in the derivation of accurate unit-cell dimensions of crystals, Proc. Phys. Soc. 57 (1945) 160-177.


[16] G.K. Williamson, W.H. Hall, X-ray line broadening from filed aluminium and wolfram, Acta Metall. 1(1) (1953) 22-31.


[17] E. Lifshin, X-ray characterization of materials, New York, Wiley, (1999).

[18] K. Girija et al., Structural, morphological and optical studies of CdSe thin films from ammonia bath, Chalcogenide Letters. 6(8) (2009) 351-357.

[19] I. Horcas et al., WSXM: A software for scanning probe microscopy and a tool for nanotechnology, Rev. Sci. Instrum. 78 (2007) 013705.

[20] A. Hussain, A. Begum, A. Rahman, Effects of annealing on nanocrystalline Bi2S3 thin films prepared by chemical bath deposition, Materials Science in Semiconductor Processing. 21 (2014) 74–81.


[21] J.I. Pankove, Optical Processes in Semiconductors, Inc, New York, Dover Publications, (1971).

[22] H. Moreno-García, M.T.S. Nair, P.K. Nair, Chemically deposited lead sulfide and bismuth sulfide thin films and Bi2S3/PbS solar cells, Thin Solid Films. 519(7) (2011) 2287-2295.


[23] J. Barman et al., Structural and optical studies of chemically prepared CdS nanocrystalline thin films, Indian J. Pure Appl. Phys. 46(5) (2008) 339–343.

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