Abstract
In this work, anatase nanocrystallites are synthesized from an aqueous titanium(IV) chloride solution by hydrolysis and are used to fabricate mesoporous TiO 2 film photoanodes. The aqueous-synthesized titania nanocrystallites possess high specific surface area (250-350 m 2 /g), 4-5 nm crystallite size, enlarged bandgap, and enhanced surface hydroxylation. Current-voltage measurements of dye-sensitized solar cells (DSSCs) based on the aqueous-synthesized titania showed higher photocurrent (13.0 mA/cm 2 ) and conversion efficiency (5.0%) when compared to cells built from commercial Dyesol (10.7 mA/cm 2 , 4.8%) or P25 (8.5 mA/cm 2 , 4.1%) benchmark nanotitania materials. The enhanced performance is discussed in terms of improved dye loading and associated electron injection and transport facilitated by the nanocrystallite surface characteristics.
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