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

J. Van De Lagemaat; A. J. Frank

doi:10.1021/jp000836o

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

J. Van De Lagemaat, A. J. Frank

Chemistry and Nanoscience

Research output: Contribution to journal › Article › peer-review

256 Scopus Citations

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 language	American English
Pages (from-to)	4292-4294
Number of pages	3
Journal	Journal of Physical Chemistry B
Volume	104
Issue number	18
DOIs	https://doi.org/10.1021/jp000836o https://doi.org/10.1021/jp000836o
State	Published - 2000

NREL Publication Number

NREL/JA-520-28684

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

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.",

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AB - 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.

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

Abstract

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