Efficient Light Harvesting
and Charge Collection of
Dye-Sensitized Solar Cells with (001) Faceted Single Crystalline Anatase
Nanoparticles
Feng Hao
Xiao Wang
Chen Zhou
Xingjian Jiao
Xin Li
Jianbao Li
Hong Lin
10.1021/jp3053967.s001
https://acs.figshare.com/articles/journal_contribution/Efficient_Light_Harvesting_and_Charge_Collection_of_Dye_Sensitized_Solar_Cells_with_001_Faceted_Single_Crystalline_Anatase_Nanoparticles/2486959
With a comparable specific surface area, 17% enhanced
dye-loading
capacity was observed for the first time in the (001) faceted TiO<sub>2</sub> single crystals compared to that of benchmark P25 nanoparticles,
thus generating a significant enrichment in both short-circuit photocurrent
density and power conversion efficiency of dye-sensitized solar cells
(DSCs). Such a remarkably increased dye-loading capacity was primarily
ascribed to the higher density of 5-fold-coordinnated Ti atoms on
the (001) surfaces. Furthermore, kinetic studies revealed that such
single crystals confer a higher electron lifetime and charge collection
efficiency compared with conventional P25 electrode, which might originate
from the specific surface configuration in these high energetic facet
dominant single crystals. Our study provides straightforward evidence
for the superior reactivity of (001) facets and implies that such
single TiO<sub>2</sub> crystals with high-energetic facets would be
a promising electrode material for DSCs.
2012-09-13 00:00:00
TiO 2 crystals
surface area
electrode material
facet
power conversion efficiency
capacity
P 25 electrode
benchmark P 25 nanoparticles
DSC
charge collection efficiency
electron lifetime
Charge Collection
density
Efficient Light Harvesting
surface configuration