3-D TiO2 nanoparticle/ITO nanowire nanocomposite antenna for efficient charge collection in solid state dye-sensitized solar cells

Gill Sang Han, Sangwook Lee, Jun Hong Noh, Hyun Suk Chung, Jong Hoon Park, Bhabani Sankar Swain, Jeong Hyeok Im, Nam Gyu Park, Hyun Suk Jung

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TiO2 nanoparticle (NP)/ITO nanowire (NW) nanocomposites for use as photoelectrode materials were fabricated to improve the charge collection efficiency in solid state dye sensitized solar cells (ss-DSSCs). The average current density for ss-DSSCs containing TiO2 NP/ITO NW arrays was 7.2 mA cm-2 that was 98% higher than that for the conventional TiO 2 NP ss-DSSCs. The intensity modulated photocurrent spectroscopy (IMPS) and intensity modulated photovoltage spectroscopy (IMVS) studies exhibited that the electron diffusion length of TiO2 NP/ITO-NW nanocomposite ss-DSSCs was in the range of 4.3-5.6 μm, longer than that of TiO2 NP solar cells (2.6-4.1 μm). The longer diffusion length was responsible for the boosted current densities of TiO2 NP/ITO NW nanocomposite ss-DSSCs. We also employed the TiO2 NP/ITO NW nanocomposite photoelectrode to inorganic-organic perovskite solar cells whose energy conversion efficiency was 7.5%.

Original languageEnglish
Pages (from-to)6127-6132
Number of pages6
Issue number11
Publication statusPublished - 2014 Jun 7
Externally publishedYes


ASJC Scopus subject areas

  • Materials Science(all)

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