Optical Properties of Poly(2- thioacetate) Thin Films Prepared By Spin-Coating Method


Ziyad T. AL-Malki, Abdullah A. Hussein, Adel A. AL-Fregi

Department of Chemistry, Polymer Research Centre, University of Basra
Department of Material Science, Polymer Research Centre, University of Basra 
Department of Chemistry, College of science, University of Basra

DOI: https://doi.org/10.17656/jzs.10574

Abstract

Poly(2-thioacetate) has been prepared and characterized by infrared spectroscopy (IR). A thin film of new Polythioacetate been prepared by spin-coating technique and its optical properties were studied . Transmittance measurements in the wavelength range (300-900 nm) were used to calculate the refractive index n and extinction coefficient k. The optical band gap Eg , optical conductivity σopt, electrical conductivity σe , real dielectric constant, complex dielectric constant, relaxation time τ and dissipation factor tan δ were determined. The analysis of the optical absorption data indicated that the optical band gap Eg was governed indirect transitions. According to Wemple and Didomenico method, the optical dispersion parameters Eo ( average excitation energy for electronic) and Ed( dispersion energy) were determined.


Key Words:
Optical properties, Polythioacetate, Refractive index, optical energy gap.


References

[1] Tariq J. Alwan, "Refractive Index Dispersion and Optical Properties of Dye Doped Polystyrene Films". Malaysian Polym. J., Vol. 2, No. 5, pp 204-213. (2010).

[2] Grazulevicius J. V., Strohriegl P., Pielichowski J., "Carba-zole-containing Polymers: Synthesis, Properties and Applications", Prog. Polym. Sci., Vol. 28, No. 9, pp 1297-1353. (2003).

[3] Akcelrud L., "Electroluminescent Polymers". Prog. Polym. Sci., Vol. 28, No. 6, pp 875-962. (2003).

[4] Kim D. Y., Cho H. N., Kim C. Y., "Blue Light Emitting Polymers". Prog. Polym. Sci., Vol. 25, No. 8, pp 1089-1139. (2000).

[5] Lo S. C., Burn P. L., "Development of Dendrimers: Macromolecules for Use in Organic Light-Emitting Diodes and Solar Cells". Chem. Rev., Vol. 107, No. 4, pp 1097- 1116. (2007).

[6] Cravino A., Sariciftci N.S., "Double-cable Polymers for Fullerene Based Organic Optoelectronic Applications". J. Mater. Chem., Vol. 12, pp 1931-1943. (2002).

[7] Luo J., Li X., Hou Q., et al., "High-Efficiency White-Light Emission from a Single Copolymer: Fluorescent Blue, Green, and Red Chromophores on a Conjugated Polymer Backbone". Adv Mater., Vol. 19, No. 8, pp 1113-1117. (2007).

[8] Liu J., Shao S., Chen L., et al., "White Electroluminescence From a Single Polymer System: Improved Performance By Means of Enhanced Effi-Ciency and Red- Shifted Luminescence of the Blue-Light-Emitting Species". Adv. Mater., Vol. 19, No. 14, pp 1859-1863. (2007).

[9] Zhen H. Y., Xu W., King W., et al., "White-Light Emission from a Single Polymer with Singlet and Triplet Chromophores on the Backbone". Macromol. Rapid. Commun, Vol. 27, No. 24, pp 2095-2100. (2006).

[10] E.M. Assim, "Optical constants of titanium monoxide TiO thin films". Journal of Alloys and Compounds Vol. 465, pp 1-7. (2008).

[11] S. Ilican, Y. Caglar and M. Caglar, "Effect of the Substrate Temperatures on the Optical Properties of the Cd0.22Zn0.78S thin films by Spray Pyrolysis Method". Physica Macedonica Vol. 56, pp 43-48. (2006).

[12] E. A. Davis, N. F. Mott, Philos. Mag. Vol. 22, pp 903. (1970).

[13] J., Tuac, "Amorphous and Liquid Semiconductors". Plenum Press, New York, pp 1-196. (1974).

[14] R.M.Silverstien , F.X. Webster and D.J.Kiemle , "Spectrometric Idendification of Organic Chemistry Compounds". 6th Ed., John Wiley and Sons , New York, (2005) .

[15] R.I. Shriner and C.K.Hermann,"Spectroscopic Techniques for Organic Chemistry". John Wiley and Sons , N. Y, ( 2004) .

[16] S. H. Deshmukh , D. K. Burghate , et Indian J. of Pure & Appl. Phys. Vol. 46, pp 344-348. (2008).

[17] J. Tauc, in: F. Abeles (ed.) "Optical properties of solids". North Holland, Amsterdam, 903, 93 (1970).

[18] M. Didomenico, S.H. Wemple, J. Appl. Phys. Vol. 40, pp 7-20. (1969).

[19] S.H. Wemple, M. Didomenico, Phys. Rev. B Vol. 3, pp 13-38. (1971).

[20] J.N. Zemel, J.D. Jensen, R.B. Schoolar, Phys. Rev. A Vol. 140, pp 330. (1965).

[21] S. Moss, Optical Properties of Semiconductors, ButterWorths Scientific Publication LTD., pp 279, OCLC nr. 301680818, London, (1959).

[22] F. Yakuphanoglu, A. Cukurovali, I. Yilmaz, Phys. B Vol. 351 ,pp 53. (2004).

[23] T. Toyoda, J. Phys. D: Appl. Phys. 18, L129 (1985).

[24] M.M. Abdel-Aziz, I.S. Yahia, L.A. Wahab, M. Fadel, M.A. Afifi, Appl. Surf. Sci. Vol. 252, pp 8165-8170. (2006).

[25] R.J. Bell, M.A. Ordal, R.W. Alexender, Appl. Opt. Vol. 24, pp 3680. (1985).

[26] M.Y. Han, H. Huang, C.H. Chew, L.M. Gan, X.J. Zhang, W. Ji, J. Phys. Chem. B Vol. 102, pp 1884. (1998).

[27] M.M. Wakkad , E.Kh. Shokr, S.H. Mohamed, J. Non-Cryst. Sol. Vol. 265, pp 157. (2000).