Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 3, Pages 1389-1393Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am405987t
Keywords
dye-sensitized solar cells (DSSCs); photoanode; electron kinetics; carbon nanotubes
Funding
- Materials Research Center of ETH Zurich
- ETH [42-12-2]
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The kinetics of charge transport in mesoporous photoanodes strongly constrains the design and power conversion efficiencies of dye sensitized solar cells (DSSCs). Here, we report a stratified photoanode design with enhanced kinetics achieved through the incorporation of a fast charge transport intermediary between the titania and charge collector. Proof of concept photoanodes demonstrate that the inclusion of the intermediary not only enhances effective diffusion coefficients but also significantly suppresses charge recombination, leading to diffusion lengths two orders of magnitude greater than in standard mcsoporous titania photoanodes. The intermediary concept holds promise for higher-efficiency DSSCs.
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