Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 6, Pages 1838-1843Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am2003735
Keywords
counter electrode; CoS; PEDOT:PSS; dye-sensitized solar cells; impedance spectroscopy
Funding
- Ministry of Education, Science and Technology (MEST) [2010-0001842, R31-2008-000-10092]
- MKE (The Ministry of Knowledge Economy), Korea under the ITRC (Information Technology Research Center) [NIPA-2010-C1090-1021-0004]
- National Research Foundation of Korea [2008-0062496] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Inorganic/organic nanocomposite counter electrodes comprised of sheetlike CoS nanoparticles dispersed in polystyrenesulfonate-doped poly(3,4-ethylenedioxythiophene (CoS/PEDOT:PSS) offer a synergistic effect on catalytic performance toward the reduction of triiodide for dye-sensitized solar cells (DSSCs), yielding 5.4% power conversion efficiency, which is comparable to that of the conventional platinum counter electrode (6.1%). The electrochemical impedance spectroscopy (EIS) and cyclic voltammetry measurements revealed that the composite counter electrodes exhibited better catalytic activity, fostering rate of triiodide reduction, than that of pristine PEDOT: PSS electrode. The simple preparation of composite (CoS/PEDOT:PSS) electrode at low temperature with improved electrocatalytic properties are feasible to apply in flexible substrates, which is at most urgency for developing novel counter electrodes for lightweight flexible solar cells.
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