Two-Dimensional Time-Dependent Numerical Modeling of Edge Effects in Dye Solar Cells
Loading...
Journal Title
Journal ISSN
Volume Title
School of Science |
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Unless otherwise stated, all rights belong to the author. You may download, display and print this publication for Your own personal use. Commercial use is prohibited.
Date
2011
Major/Subject
Mcode
Degree programme
Language
en
Pages
7019-7031
Series
Journal of Physical Chemistry C, Volume 115, Issue 14
Abstract
A 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.Description
Keywords
sensitized, modeling, electrochemical impedandance
Other note
Citation
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.