Journal
NANOSCALE
Volume 6, Issue 11, Pages 6127-6132Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr00621f
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Funding
- National Research Foundation of Korea (NRF) - Korean government (MEST) [2012M3A6A7054861, 2011-0017210]
- Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2012M3A7B4049967]
- National Research Foundation of Korea [2012M3A6A7054861, 2011-0017210, 2012M3A7B4049986] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 TiO2 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 mu m, longer than that of TiO2 NP solar cells (2.6-4.1 mu m). 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%.
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