염료 감응형 태양전지에서 시간의 경과에 따른셀의 특성 저하 연구

초록

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 (jsc) of the cell dropped from 9.9 to 7mA/cm2while efficiency (jsc) 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 (Voc). EIS study of the DSSC in the this work showed that the electron life time Tr and chemical capacitance Cu decreased significantly after six days. It was correlated the jsc and efficiency decreased after six days.

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