Two-Dimensional Time-Dependent Numerical Modeling of Edge Effects in Dye Solar Cells
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Journal of Physical Chemistry C, Volume 115, Issue 14
AbstractA two-dimensional transient model of dye solar cells (DSC) describing the electrochemical reactions in the cell has been prepared. The model includes the relevant components of DSCs: the photoelectrode, the electrolyte, and the counter electrode. The solved variables are potential and the concentrations of the different ion species, which can be used to determine, e.g., the current−voltage characteristics of the cell. The largest benefit of this model is its 2D features which enable the study of lateral inhomogeneity. Using the model, a new phenomenon was described: lateral current density distribution caused by a small difference in the size between photoelectrode and counter electrode, typical of laboratory test cells, causes tri-iodide to move from the edge region to the active area of the cell. This process takes a relatively long time (8 min) and can be important for performance characterization and design of DSCs.
sensitized, modeling, electrochemical impedandance
Miettunen, Kati & Halme, Janne & Visuri, Anne-Maria & Lund, Peter. 2011. Two-Dimensional Time-Dependent Numerical Modeling of Edge Effects in Dye Solar Cells. Journal of Physical Chemistry C. Volume 115, Issue 14. 7019-7031. ISSN 1932-7447 (printed). DOI: 10.1021/jp110927j.