Abstract
In this paper, we have carried out thin film characterization of poly(3,4-propylenedioxythiophene)–sultone (PProDOT–S), a derivative of electrochromic poly(3,4-propylenedioxythiophene) (PProDOT). PProDOT–S was deposited onto transparent conducting oxide coated glass substrates by solution casting method. Single wavelength spectrophotometry is used to monitor the switching speed and contrast ratio at maximum wavelength (λ max). The percentage transmittance at the λ max of the neutral polymer is monitored as a function of time when the polymer film is repeatedly switched. This experiment gives a quantitative measure of the speed with which a film is able to switch between the two states i.e. the coloured and the bleached states. PProDOT–S films were switched at a voltage of 1·9 V with a switching speed of 2 s at λ max of 565 nm and showed a contrast of ∼37%. Cyclic voltammetry performed at different scan rates have shown the characteristic anodic and cathodic peaks. The structural investigations of PProDOT–S films by IR spectra were in good agreement with previously reported results. Raman spectra of PProDOT–S showed a strong Raman peak at 1509 cm − 1 and a weak peak at 1410 cm − 1 due to the C = C asymmetric and symmetric stretching vibrations of thiophene rings. The morphological investigations carried out by using scanning electron microscope (SEM) of polymer films have shown that these polymers are found to be arranged in dense packed clusters with non-uniform distribution having an average width and length of 95 nm and 160 nm, respectively.
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References
Aysegul G, Omastov M and Yavuz A G 2007 Synth. Met. 157 23
Burroughes J H, Bradley D D C and Holmes A B 1995 Nature 347 539
Gosse B, Gosse J P, Gadoum A and Nemamcha M 1992 J. Appl. Polym. Sci. 46 1121
Granquist C G 2000 Sol. Energ. Mat. Sol. C. 60 201
Granquist C G, Avendano E and Azens A 2003 Thin Solid Films 442 201
Habib M A and Murphy O J 1992 Electrochemistry in transition (New York: Plenum Press)
Ikenoue Y, Saida Y, Kira M, Tomozawa H, Yashima H and Kobayashi M 1990 J. Chem. Soc., Chem. Commun. (DOI: 10.1039,1694-1695).
Jain V, Sahoo R, Mishra S P, Sinha J, Montazami R, Yochum H M, Heflin J R and Kumar A 2009 Macromolecules 42 135
Kitching S and Donald A M 1998 J. Microsc. 190 357
Krishnamoorthy K, Ambade A V, Kanungo M, Contractor A Q and Kumar A 2001 J. Mater. Chem. 11 2909
Liu K, Zhenglon K, Xue H, Zhang R and Zhu J 2008 J. Power Sources 179 858
Metin A K, Cirpan A, Yılmaz F, Yusuf Y and Toppare L 2005 Eur. Polym. J. 41 967
Mishra S P, Sahoo R, Ambade A V, Contractor A Q and Kumar A 2004 J. Mater. Chem. 14 1896
Monk P M S, Mortimer R J and Rosseinsky D R 1995 Electrochromism: fundamentals and applications (Weinheim: VCH)
Mortimer R J 1999 Electrochem. Acta 44 2971
Rosseinsky D R and Mortimer R J 2001 Adv. Mater. 3 783
Sarada P M, Krishnamoorthy K, Sahoo R and Kumar A 2004 J. Polym. Sci. Part A Polym. Chem. 43 419
Shao Y 2011 Applications of ionic liquids in science and technology, (ed.) Scott Handy (USA: Middle Tennessee State University) p. 136
Sindhu S, Narasimha Rao K, Ahuja S, Kumar A and Gopal E S R 2006 Mater. Sci. Eng. B132 39
Svensson J S E M and Granqvist C G 1984 Electrochromic coatings for smart windows, Proc. SPIE (Bangalore: The International Society for Optical Engineering) Vol. 502, pp 30–37
Vacca P, Petrosino M, Miscioscia R, Nenna G, Minarini C, Sala D D and Rubino A 2008 Thin Solid Films 516 4232
Varis S, Ak M, Tanyeli C, Akhmedov I M and Toppare L 2006 Eur. Polym. J. 42 2352
Welsh D M, Kuamr A, Morvant M C and Reynolds J R 1999a Synth. Metals 102 967
Welsh D M, Kumar A, Meijer E W and Reynolds J R 1999b Adv. Mater. 11 1379
Woo H S, Cho S, Kwon T W, Park D K, Kim Y B, Czerw R, Carroll D L and Park J W 2005 J. Korean Phys. Soc. 46 981
Xiao Y, Cui X and Martin D C 2004 J. Electroanal. Chem. 573 43
Yu G, Hummelen J C, Wudl F and Heeger A J 1995 Science 270 1789
Acknowledgements
The authors are grateful to Dr Anil Kumar and his group, Department of Chemistry, Indian Institute of Technology, Mumbai, for the synthesis and supply of the polymer. The authors would like to thank the Department of Science and Technology, Govt of India, for financial support.
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SINDHU, S., SIJU, C.R., SHARMA, S.K. et al. Optical, electrochemical and morphological investigations of poly (3,4-propylenedioxythiophene)–sultone (PProDOT–S) thin films. Bull Mater Sci 35, 611–616 (2012). https://doi.org/10.1007/s12034-012-0327-1
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DOI: https://doi.org/10.1007/s12034-012-0327-1