• Journal of the Korean Applied Science and Technology
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• v.31 no.3
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• pp.337-344
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• 2014

In this paper, we have examined the interaction of low bandgap polymer {poly(2-heptadecyl-4-vinylthieno[3,4-d]thiazole)(PHVTT)} with ionic liquids. Further, we have studied the temperature dependent interactions between the ionic liquids [tri-butyl methyl ammonium methyl sulfate ([TBMA][$MeSO_4$]), methyl imidazolium chloride ([MIM]Cl) and butyl methyl imidazolium chloride ([BMIM]Cl)] and polymer using UV-vis spectroscopy, FT-IR spectroscopy, photoluminescence (PL) spectroscopy, as a function of temperature at 21, 28, 32, $37^{\circ}C$. These experimental results suggest that interactions of polymer with ionic liquids ([MIM]Cl, [TBMA][$MeSO_4$]) showed weak interactions by increasing temperature but [BMIM]Cl has no significant effect with increase in temperature.

• Journal of the Korean Applied Science and Technology
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• v.30 no.3
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• pp.461-471
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• 2013

Use of low bandgap polymers is the most suitable way to harvest a broader spectrum of solar radiations for solar cells. But, still there is lack of most efficient low bandgap polymer. In order to solve this problem, we have synthesised a new low bandgap polymer and investigated its interaction with the ILs to enhance its conductivity. ILs may undergo almost unlimited structural variations; these structural variations have attracted extensive attention in polymer studies. In addition to this, UV-Vis spectroscopy, confocal Raman spectroscopy and FT-IR spectroscopy results have revealed that all studied ILs (tributylmethylammonium methyl sulfate [$N_{1444}$][$MeSO_4$] from ammonium family) and 1-methylimidazolium chloride ([MIM]Cl, and 1-butyl-3-methylimidazolium chloride [Bmim]Cl from imidazolium family) has potential to interact with polymer. Further, protic ILs shows enhanced conductivity than aprotic ILs with low bandgap polymer. This study provides the combined effect of low bandgap polymer and ILs that may generate many theoretical and experimental opportunities.