Journal
JOURNAL OF POWER SOURCES
Volume 274, Issue -, Pages 937-942Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.10.125
Keywords
Tandem solar cell; Selective etching; Dye-sensitized solar cell; Nanoporous electrode
Funding
- National Research Foundation of Korea (NRF) [2013R1A1A2065793, 2010-0029065]
- National Research Foundation of Korea [2013R1A1A2065793] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A tandem dye-sensitized solar cell (tandem-DSSC) was synthesized on the basis of thin-film semiconductor electrodes. The nanoporous p-type NiO films were successfully obtained by simultaneous deposition of Al and Ni, followed by selective etching of Al and oxidation. Likewise, the n-type photoanode was made where Ag was etched in nitric acid after the initial formation of Ag/TiO2 nanocomposites. Such dye-sensitized photoelectrodes were combined to construct a tandem solar cell which exhibited an enhanced open-circuit voltage. Also, the tandem devices were subjected to various light fluxes to correlate the experimental cell parameters (open-circuit voltage, short-circuit current, fill factor, recombination shunt resistance, etc.) with the ideal one-diode model. Interestingly, impedance spectra of the tandem cell was well matched with the parameters from each of the n-type or p-type DSSC, indicative of successfully-designed tandem structure. (C) 2014 Elsevier B.V. All rights reserved.
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