Bulletin of the Korean Chemical Society

  • 제32권8호
  • /
  • Pages.2671-2676
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  • 2011
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Charge Transport Characteristics of Dye-Sensitized TiO2 Nanorods with Different Aspect Ratios

  • Kim, Eun-Yi (Department of Chemistry, Inha University) ;
  • Lee, Wan-In (Department of Chemistry, Inha University) ;
  • Whang, Chin Myung (School of Materials Science and Engineering, Inha University)
  • 투고 : 2011.05.29
  • 심사 : 2011.06.27
  • 발행 : 2011.08.20
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초록

Nanocrystalline $TiO_2$ spherical particle (NP) with a dimension of 5 ${\times}$ 5.5 nm and several nanorods (NR) with different aspect ratios (diameter ${\times}$ length: 5 ${\times}$ 8.5, 4 ${\times}$ 15, 4 ${\times}$ 18 and 3.5 ${\times}$ 22 nm) were selectively synthesized by a solvothermal process combined with non-hydrolytic sol-gel reaction. With varying the molar ratio of TTIP to oleic acid from 1:1 to 1:16, the NRs in the pure anatase phase were elongated to the c-axis direction. The prepared NP and NRs were applied for the formation of nanoporous $TiO_2$ layers in dye-sensitized solar cell (DSSC). Among them, NR2 ($TiO_2$ nanorod with 4 ${\times}$ 15 nm) exhibited the highest cell performance: Its photovoltaic conversion efficiency (${\eta}$) of 6.07%, with $J_{sc}$ of 13.473 mA/$cm^2$, $V_{oc}$ of 0.640 V, and FF of 70.32%, was 1.44 times that of NP with a size of 5 ${\times}$ 5.5 nm. It was observed from the transient photoelectron spectroscopy and the incident photon to current conversion efficiency (IPCE) spectra that the $TiO_2$ films derived from NR2 demonstrate the longest electron diffusion length ($L_e$) and the highest external quantum efficiency (EQE).

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  2. One dimensional nanostructure/nanoparticle composites as photoanodes for dye-sensitized solar cells vol.4, pp.9, 2012, https://doi.org/10.1039/c2nr30347g
  3. Hybrid Titania Photoanodes with a Nanostructured Multi-Layer Configuration for Highly Efficient Dye-Sensitized Solar Cells vol.4, pp.9, 2013, https://doi.org/10.1021/jz400620q