perature. In general, the total series resistance (RS) of a
DSSC can be represented as the expression RS = RFTO + -
RPt + RI. Here, RFTO denotes the resistance of the FTOcoated
glass substrate, RPt the charge transfer resistance
at the Pt-coated counter electrode, and RI the diffusion
resistance resulting from the transport of holes in the
iodide-based liquid electrolyte. In our trials, there was no
appreciable change in RFTO at various cell temperatures.
This suggests that cell temperature hardly affects the RFTO
values. However, both RPt and RI gradually decrease with
increasing operating temperature, thereby suggesting that
the operating temperature strongly affects the charge transfer
kinetics between the counter electrode and liquid electrolyte.
We believe that the increase in cell temperature
correspondingly changes the viscosity of the liquid electrolyte
such that the charge recombination rate between
photogenerated electrons and liquid electrolyte is accordingly
affected.
perature. In general, the total series resistance (RS) of aDSSC can be represented as the expression RS = RFTO + -RPt + RI. Here, RFTO denotes the resistance of the FTOcoatedglass substrate, RPt the charge transfer resistanceat the Pt-coated counter electrode, and RI the diffusionresistance resulting from the transport of holes in theiodide-based liquid electrolyte. In our trials, there was noappreciable change in RFTO at various cell temperatures.This suggests that cell temperature hardly affects the RFTOvalues. However, both RPt and RI gradually decrease withincreasing operating temperature, thereby suggesting thatthe operating temperature strongly affects the charge transferkinetics between the counter electrode and liquid electrolyte.We believe that the increase in cell temperaturecorrespondingly changes the viscosity of the liquid electrolytesuch that the charge recombination rate betweenphotogenerated electrons and liquid electrolyte is accordinglyaffected.
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