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http://dx.doi.org/10.7316/KHNES.2013.24.5.421

Time Dependent Degradation of Cell in Dye-Sensitized Solar Cell  

Seo, Hyun Woo (Department of Materials science and Engineering, Hongik University)
Kim, Ki Soo (Department of Materials science and Engineering, Hongik University)
Beak, Hyun Duk (Department of Materials science and Engineering, Hongik University)
Kim, Dong Min (Department of Materials science and Engineering, Hongik University)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.24, no.5, 2013 , pp. 421-427 More about this Journal
Abstract
We report on the time dependent degradation of cell in dye-sensitized solar cells (DSSC). The photovoltaic performance of DSSC over a period of time was investigated in liquid electrolyte based on triiodide/iodide during six days. It was found that the short circuit current density ($j_{sc}$) of the cell dropped from 9.9 to $7mA/cm^2$ while efficiency (${\eta}$) of the cell decreased from 4.4 to 3.3%. The parameters corresponding to fundamental electronic and ionic processes in a working DSSC are determined from the electrochemical impedance spectrascopy (EIS) at open-circuit potential ($V_{oc}$). EIS study of the DSSC in the this work showed that the electron life time ${\tau}_r$ and chemical capacitance $C_{\mu}$ decreased significantly after six days. It was correlated the $j_{sc}$ and efficiency decreased after six days.
Keywords
DSSC; degradation; Electrochemical Impedance spectroscopy; j-V curve; efficiency;
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