A highly efﬁcient ZnO photoanode for dye-sensitized solar cells was successfully grown by a simple, low cost, and scalable method. A nanostructured coral-shaped Zn layer was deposited by sputtering onto ﬂuorine-doped tin oxide/glass slices at room temperature and then thermally oxidized in ambient atmosphere. Stoichiometry, crystalline phase, quality, and morphology of the ﬁlm were investigated, evidencing the formation of a highly porous branched nanostructure, with a pure wurtzite crystalline structure. ZnO-based dye-sensitized solar cells were fabricated with customized microﬂuidic architecture. Dye loading on the oxide surface was analyzed with ultraviolet-visible spectroscopy, and the dependence of the cell efﬁciency on sensitizer incubation time and ﬁlm thickness was studied by current-voltage electrical characteriza- tion, incident photon-to-electron conversion efﬁciency, and impedance spectroscopy measurements, showing the promising properties of this material for the fabrication of dye-sensitized solar cell photoanodes with a solar conversion efﬁciency up to 4.58%.
|Titolo:||Coral-shaped ZnO nanostructures for Dye Sensitized Solar Cell photoanodes|
|Data di pubblicazione:||2014|
|Digital Object Identifier (DOI):||10.1002/pip.2251|
|Appare nelle tipologie:||1.1 Articolo in rivista|