Current Photovoltaic Research

Korea Photovoltaic Society (한국태양광발전학회)
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Optical Properties of Soluble Polythiophene for Flexible Solar Cell

  • Kim, Byoung-Ju (Department of New and Renewable Energy, Kyungil University) ;
  • Park, Eun-Hye (Department of New and Renewable Energy, Kyungil University) ;
  • Kang, Kwang-Sun (Department of New and Renewable Energy, Kyungil University)
  • Received : 2018.06.08
  • Accepted : 2018.12.19
  • Published : 2018.12.31
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Abstract

Polythiophene-$TiO_2$ composite was synthesized with different molar ratios of thiophene and titaniumisopropoxide ($Ti(OPr)_4$) for flexible solar cell application as a flexible electrode or an active material. The $Ti(OPr)_4$ was stabilized by thiophene. The thiophene was polymerized by ferric chloride catalyst. The synthesized polythiophene exhibited strong UV-visible absorption in the range of the wavelength shorter than 500 nm. Field emission scanning electron microscope (FESEM) image of low concentration of $TiO_2$ film showed smooth surface. However, FESEM image of high concentration of $TiO_2$ film exhibited relatively rough surface. Polythiophene concentration dependent strong photoluminescence quenching of surfrhodamine-B was observed.

Keywords

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Fig. 1. Schematic representation of the synthetic process and possible chemical structures

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Fig. 2. FESEM images of PThTiO2 synthesized with (a) 0.3 g of Ti(OPr)4 and (b) 0.5 g of Ti(OPr)4

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Fig. 3. UV-visible absorption spectra with various amount of PThTiO2 solution.

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Fig. 4. PL quenching spectra of PThTiO2 with excitation wavelength of (a) 480 nm and (b) 500 nm

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