The optical properties of nanoporous structured titanium dioxide and the photovoltaic efficiency on DSSC |
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Authors: | Yeji Lee Misook Kang |
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Affiliation: | Department of Chemistry, College of Science, Yeungnam University, 214-1 Dae-dong, Gyeongsan, Gyeongbuk 712-749, South Korea |
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Abstract: | This study examined the characterization of nanoporous structured titanium dioxide and its application to dye-sensitized solar cells (DSSCs). TEM revealed nanopore sizes of 10.0 nm with a regular hexagonal form. When nanoporous structured TiO2 was applied to DSSC, the energy conversion efficiency was enhanced considerably compared with that using nanometer sized TiO2 prepared using a hydrothermal method. The energy conversion efficiency of the DSSC prepared from nanoporous structured TiO2 was approximately 8.71% with the N719 dye under 100 mW cm−2 simulated light. FT-IR spectroscopy showed that the dye molecules were attached perfectly to the surface and more dye molecules were absorbed on the nanoporous structured TiO2 than on the nano-sized TiO2 particles prepared using a conventional hydrothermal method. Electrostatic force microscopy (EFM) showed that the electrons were transferred rapidly to the surface of the nanoporous structured TiO2 film. |
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Keywords: | Nanoporous TiO2 Nano-sized TiO2 Dye-sensitized solar cell (DSSC) N719 dye |
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