Current Photovoltaic Research

Korea Photovoltaic Society (한국태양광발전학회)
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Synthesis and Characterization of Soluble Polyaniline and TiO2 Composite

  • Kim, Byoung-Ju (Department of New and Renewable Energy, Kyungil University) ;
  • Kang, Kwang-Sun (Department of New and Renewable Energy, Kyungil University)
  • Received : 2015.07.21
  • Accepted : 2015.07.29
  • Published : 2015.09.30
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Abstract

Soluble polyaniline was synthesized by attaching titanium isoproxide ($Ti(OPr)_4$) to the amine group of the aniline. Approximately 1 to 1 molar ratio of aniline and $Ti(OPr)_4$ was mixed and polymerized with ammonium persulfate. The FTIR result showed clear difference between $TiO_2$-aniline composite ($TiO_2An$) and $TiO_2$-polyaniline composite ($TiO_2PAn$). Although the $TiO_2An$ had negligible UV-visible absorption, the $TiO_2PAn$ showed strong absorption in the UV-visible region. Photoluminescence (PL) peaks of $TiO_2An$ were shifted toward red with the reduction of the excitation energy, which could be due to the multiple emission centers. The luminescence peak shift stopped at 501 nm. The PL spectra of $TiO_2PAn$ exhibited three emission peaks at 2.88 eV (430 nm), 2.48 eV (501 nm) and 2.22 eV (558 nm). The new emission center (2.22 eV) was observed after polymerization. Field emission scanning electron microscope image showed crack-free composite film.

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References

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