Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 27, Pages 9973-9979Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.08.082
Keywords
Carbon nanotubes; Poly acrylonitrile; Composite electrolyte; Dye sensitized solar cells; Short circuit current density
Categories
Funding
- Ministry of Knowledge Economy
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20104010100660]
- Center for Future Energy Materials and Devices by National Research Foundation (NRF), Korea
- Korea Evaluation Institute of Industrial Technology (KEIT) [20104010100660] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A new carbon nanotube (CNTs)-poly acrylonitrile (PAN) composite electrolyte was prepared by the thermal polymerization of acrylonitrile (AN) with CNTs for solid-state dye sensitized solar cells (DSSCs). It was found that the uniform CNT-PAN composite was formed due to the thermal polymerization of AN on CNTs. The strong bonding between CNTs and PAN could be confirmed by the characterization of XPS and Raman spectroscopy, resulting in the lowering of crystallinity and the increasing the ionic conductivity of composite electrolytes. On comparison with bare CNTs and the other composite electrolytes, the formation of triiodide (I-3(-)) ions in CNT-PAN composite electrolytes was drastically increased which was expected from the high ionic conductivity of electrolyte via I-3(-)/I- redox couple. DSSCs fabricated with CNT-PAN composite electrolytes achieved relatively high conversion efficiency of 3.9% with an open circuit voltage (V-OC) of 0.57 V. short circuit current density (J(SC)) of 10.9 mA/cm(2) and fill factor of 63.6%, which attributed to supply the higher extent of I-3(-) ions from CNT-PAN composite electrolyte during the charge transport process. (C) 2011 Elsevier Ltd. All rights reserved.
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