Estimation of the Charge-Collection Efficiency of Dye-Sensitized Nanocrystalline TiO2 Solar Cells

G. Schlichthörl; N. G. Park; A. J. Frank

doi:10.1524/zpch.1998.1.1.047

Estimation of the Charge-Collection Efficiency of Dye-Sensitized Nanocrystalline TiO₂ Solar Cells

G. Schlichthörl
, N. G. Park
, A. J. Frank

National Renewable Energy Laboratory

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

2 Scopus citations

Abstract

The dependence of the charge collection efficiency on the time constant for recombination τ_oc and for the combined process of recombination and charge collection τ_sc is calculated. The respective time constants can be obtained experimentally by intensity modulated photo voltage spectroscopy (IMVS) and intensity modulated photocurrent spectroscopy (IMPS) measurements. A new method is presented to determine τ_oc and τ_sc from the steady-state electron-concentration profiles in the TiO₂ film n(x) calculated for constant light intensity. The continuity equation is modified to account for charge trapping and detrapping and the nonlinearity of the recombination rate on n. A simple expression is derived for calculating the charge-collection efficiency from the measured values of values of toc/tsc and the light intensity dependence of τ_oc.

Original language	English
Pages (from-to)	47-52
Number of pages	6
Journal	Zeitschrift fur Physikalische Chemie
Volume	1
Issue number	1
DOIs	https://doi.org/10.1524/zpch.1998.1.1.047
State	Published - Jan 1998
Externally published	Yes

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10.1524/zpch.1998.1.1.047

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abstract = "The dependence of the charge collection efficiency on the time constant for recombination τoc and for the combined process of recombination and charge collection τsc is calculated. The respective time constants can be obtained experimentally by intensity modulated photo voltage spectroscopy (IMVS) and intensity modulated photocurrent spectroscopy (IMPS) measurements. A new method is presented to determine τoc and τsc from the steady-state electron-concentration profiles in the TiO2 film n(x) calculated for constant light intensity. The continuity equation is modified to account for charge trapping and detrapping and the nonlinearity of the recombination rate on n. A simple expression is derived for calculating the charge-collection efficiency from the measured values of values of toc/tsc and the light intensity dependence of τoc.",

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AU - Schlichthörl, G.

AU - Park, N. G.

AU - Frank, A. J.

PY - 1998/1

Y1 - 1998/1

N2 - The dependence of the charge collection efficiency on the time constant for recombination τoc and for the combined process of recombination and charge collection τsc is calculated. The respective time constants can be obtained experimentally by intensity modulated photo voltage spectroscopy (IMVS) and intensity modulated photocurrent spectroscopy (IMPS) measurements. A new method is presented to determine τoc and τsc from the steady-state electron-concentration profiles in the TiO2 film n(x) calculated for constant light intensity. The continuity equation is modified to account for charge trapping and detrapping and the nonlinearity of the recombination rate on n. A simple expression is derived for calculating the charge-collection efficiency from the measured values of values of toc/tsc and the light intensity dependence of τoc.

AB - The dependence of the charge collection efficiency on the time constant for recombination τoc and for the combined process of recombination and charge collection τsc is calculated. The respective time constants can be obtained experimentally by intensity modulated photo voltage spectroscopy (IMVS) and intensity modulated photocurrent spectroscopy (IMPS) measurements. A new method is presented to determine τoc and τsc from the steady-state electron-concentration profiles in the TiO2 film n(x) calculated for constant light intensity. The continuity equation is modified to account for charge trapping and detrapping and the nonlinearity of the recombination rate on n. A simple expression is derived for calculating the charge-collection efficiency from the measured values of values of toc/tsc and the light intensity dependence of τoc.

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JF - Zeitschrift fur Physikalische Chemie

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Estimation of the Charge-Collection Efficiency of Dye-Sensitized Nanocrystalline TiO₂ Solar Cells

Abstract

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