Journal
JOURNAL OF POWER SOURCES
Volume 177, Issue 2, Pages 631-636Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2007.10.096
Keywords
dye-sensitized solar cells; acetylene-black; Pt; light-to-electricity conversion efficiency
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We reported on the synthesis, characterization, and photovoltaic/electrochemical properties of Pt/acetylene-black (AB) cathode as well as their application in dye-sensitized solar cells (DSCs). The Pt/AB electrode was prepared through a thermal decomposition of H2PtCl6 on the AB substrate. SEM and TEM observations showed that the Pt nanoparticles were homogeneously dispersed on the AB surface. The Pt-loading content in the Pt/AB electrode was only about 2.0 mu g cm(-2), which was much lower than 5-10 mu g cm(-2) generally used for the Pt electrode in DSCs. Electrochemical measurements displayed a low charge-transfer resistance of 1.48 Omega cm(2) for the Pt/AB electrode. Furthermore, when this low-Pt-loading electrode was used as the cathode of DSCs, an overall light-to-electricity energy conversion efficiency of 8.6% was achieved, showing commercially realistic energy conversion efficiency in the application of DSCs. (C) 2007 Elsevier B.V. All rights reserved.
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