Current Photovoltaic Research

Korea Photovoltaic Society (한국태양광발전학회)
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Poling Field Effect on Absorption and Luminescence of Disperse Red-19 and TiO2 Composites

  • Kim, Byoung-Ju (Department of New and Renewable Energy, Kyungil University) ;
  • Hwang, Un-Jei (Department of New and Renewable Energy, Kyungil University) ;
  • Jo, Dong-Hyun (Department of New and Renewable Energy, Kyungil University) ;
  • Lim, Sae-Han (Department of New and Renewable Energy, Kyungil University) ;
  • Kang, Kwang-Sun (Department of New and Renewable Energy, Kyungil University)
  • Received : 2015.02.25
  • Accepted : 2015.03.03
  • Published : 2015.03.31
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Abstract

Absorption and luminescence characteristics of disperse red-19 (DR-19) and $TiO_2$ composite have been investigated with various poling electric field strengths. Two step synthetic processes were employed to employ the DR-19 to the $TiO_2$ sol-gel. Firstly, urethane bond formation between DR-19 (-OH) and 3-isocyanatopropyl triethoxysilane (ICPTES, -N=C=O) performed (ICPDR) prior incorporation to the $TiO_2$ sol-gel. Secondary, the hydrolysis of the ethoxy group from the ICPTES and condensation reaction between silanol groups from ICPTES and $TiO_2$ sol-gel were performed. The ICPDR and $TiO_2$ sol-gel ($DRTiO_2$) were mixed and stirred for several days. The composite was coated to the ITO coated glass substrate. Corona poling were performed before drying the composite with various electric field strengths. The absorption intensity decreased with the increase of the poling field strength, which resulted in the increase of poling efficiency. The photoluminescence also decreased as the poling field strength increased. There is long luminescence tail for the poled $DRTiO_2$ film compared with unpoled $DRTiO_2$ film. The luminescence long tail indicates that the self-trapped excitons and polarons were generated when the $DRTiO_2$ film was poled with electric field.

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References

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