Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 561, Issue -, Pages 206-210Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.01.188
Keywords
Dye-sensitized solar cells; SnO2 blocking layer; Nanocluster deposition; Solar energy conversion efficiency; Low temperature processing
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Funding
- National Research Foundation of Korea (NRF)
- Korea government (MEST) [2012-0000119]
- National Research Foundation of Korea [2009-0079164] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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SnO2 blocking layers of various thicknesses were tested for an enhancement to the efficiency of dye-sensitized solar cells (DSSCs). The blocking layers were placed onto FTO/glass substrates at 240 degrees C using a nanocluster deposition (NCD) technique. The root mean square (rms) roughness of the FTO with 120 nm-thick SnO2 blocking layers showed an increase of about 15% compared with that of a bare-FTO, and the transmittance of the SnO2/FTO structures was not changed compared with that of the bare-FTO. The SnO2 blocking layer prepared by NCD played an important role in increasing the contact area between TiO2 thick films and FTO, which helped prevent electron movement back to the electrolyte, and decreased the contact resistance at the TiO2/FTO interface. The energy-conversion efficiency of the 120 nm-thick SnO2/FTO-based DSSCs was significantly improved, by about 12.1%, compared with that of a bare FTO-based DSSC. (C) 2013 Elsevier B.V. All rights reserved.
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