Abstract
For high solar conversion efficiency of dye-sensitized solar cells [DSSCs], TiO2 nanofiber [TN] and Ag-doped TiO2 nanofiber [ATN] have been extended to be included in TiO2 films to increase the amount of dye loading for a higher short-circuit current. The ATN was used on affected DSSCs to increase the open circuit voltage. This process had enhanced the exit in dye molecules which were rapidly split into electrons, and the DSSCs with ATN stop the recombination of the electronic process. The conversion efficiency of TiO2 photoelectrode-based DSSCs was 4.74%; it was increased to 6.13% after adding 5 wt.% ATN into TiO2 films. The electron lifetime of DSSCs with ATN increased from 0.29 to 0.34 s and that electron recombination was reduced.
Highlights
Since the Grätzel group discovered dye-sensitized solar cells [dye-sensitized TiO2 solar cells (DSSC)], many people became interested
DSSCs, the photoexcited electrons of the dye adsorbing on the TiO2 surface are transferred to the conduction band of TiO2, which are taken to an outer circuit using a fluorine-doped tin oxide [FTO] substrate and a counter electrode, respectively, and the electrons are passed to an electrolyte [5,6]
In conclusion, TN and ATN were added into the TiO2 film of DSSCs
Summary
Since the Grätzel group discovered dye-sensitized solar cells [DSSCs], many people became interested. In order to get a high solar conversion efficiency in DSSCs, a high surface area for the porous TiO2 films for efficient absorption of the sensitizer and good networking between the particle to particle or particle to FTO substrate are very important [7-10]. In order to increase the solar conversion efficiency in DSSCs, have been studied about photoelectrodes such as synthesis of the wide bandgap of TiO2, the small particle size of 10 to approximately 20 nm, the wide surface area of TiO2, and the porosity.
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