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

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

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
JournalNanoscale
Volume6
Issue number11
DOIs
Publication statusPublished - 2014 Jun 7
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)

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    Han, G. S., Lee, S., Noh, J. H., Chung, H. S., Park, J. H., Swain, B. S., Im, J. H., Park, N. G., & Jung, H. S. (2014). 3-D TiO2 nanoparticle/ITO nanowire nanocomposite antenna for efficient charge collection in solid state dye-sensitized solar cells. Nanoscale, 6(11), 6127-6132. https://doi.org/10.1039/c4nr00621f