Ordered Mesoporous SnO<sub>2</sub>−Based Photoanodes for High-Performance Dye-Sensitized Solar Cells
Easwaramoorthi Ramasamy
Jinwoo Lee
10.1021/jp1074797.s001
https://acs.figshare.com/articles/journal_contribution/Ordered_Mesoporous_SnO_sub_2_sub_Based_Photoanodes_for_High_Performance_Dye_Sensitized_Solar_Cells/2702806
Ordered mesoporous SnO<sub>2</sub> with three-dimensional bicontinuous cubic mesostructure, high surface area, and crystalline frameworks was synthesized by the solvent-free infiltration of tin precursor in KIT-6 silica template and employed as a photoanode in dye-sensitized solar cells (DSSCs). It is shown that coating an ultrathin TiO<sub>2</sub> or Al<sub>2</sub>O<sub>3</sub> layer on mesoporous SnO<sub>2</sub> photoanode greatly improves the open-circuit voltage, short-circuit current, and fill factor, leading to more than a 3-fold improvement in the energy conversion efficiency. The superior photovoltaic performance of surface modified mesoporous SnO<sub>2</sub> photoanode is mainly the result of inhibited electron recombination caused by passivation of reactive surface states and increased dye loading. Control cells fabricated with conventional nanoparticle SnO<sub>2</sub>/TiO<sub>2</sub> photoanode exhibit a similar trend but with about 30% lower energy conversion efficiency, which is mainly because of limitations due to low dye loading and poor light scattering.
2010-12-23 00:00:00
ultrathin TiO 2
mesoporous SnO 2 photoanode
DSSC
energy conversion efficiency
reactive surface states
KIT
dye loading
Al 2O layer