Effect of the Surface-State Distribution on Electron Transport in Dye-Sensitized TiO2 Solar Cells: Nonlinear Electron-Transport Kinetics

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Abstract

Analytical expressions describing electron transport in dye-sensitized nanocrystalline TiO2 solar cells are derived and verified by intensity-modulated photocurrent spectroscopy measurements. An exponential distribution of surface states can account for the observed power law dependence of the electron-transport rate on the electron population. Use of an effective electron diffusion coefficient to describe the electron transport kinetics is found to be inadequate. A slope of 69 meV is inferred for the surface-state distribution curve.

Original languageAmerican English
Pages (from-to)4292-4294
Number of pages3
JournalJournal of Physical Chemistry B
Volume104
Issue number18
DOIs
StatePublished - 2000

NREL Publication Number

  • NREL/JA-520-28684

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