The construction of tandem dye-sensitized solar cells from chemically-derived nanoporous photoelectrodes

A tandem dye-sensitized solar cell (tandem-DSSC) was synthesized on the basis of thin-film semi-conductor 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 photo-anod...

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Published inJournal of power sources Vol. 274; pp. 937 - 942
Main Authors Choi, Hongsik, Hwang, Taehyun, Lee, Sangheon, Nam, Seunghoon, Kang, Joonhyeon, Lee, Byungho, Park, Byungwoo
Format Journal Article
LanguageEnglish
Published 15.01.2015
Subjects
Aluminum
Dyes
Electric potential
Etching
Mathematical models
Nanostructure
Photovoltaic cells
Silver
Solar cells
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Summary:A tandem dye-sensitized solar cell (tandem-DSSC) was synthesized on the basis of thin-film semi-conductor 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 photo-anode was made where Ag was etched in nitric acid after the initial formation of Ag/TiO sub(2) nano-composites. 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.
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ISSN:0378-7753
DOI:10.1016/j.jpowsour.2014.10.125