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Choice of electrode geometry for accurate measurement of organic photovoltaic cell performance
Kim, M. -S.; Kang, M.-G.; Guo, L. Jay*; Kim, J.*
Organic Photovoltaic Cell
The relationship between the performance and the electrode geometry of organic photovoltaic devices was investigated to establish proper electrode geometry for reproducible and accurate performance measurement. Photovoltaic cells (ITO/PEDOT:PSS/P3HT+PCBM/LiF/Al) having crossbar-type and island-type electrode geometry were fabricated. The crossbar-type cells varied greatly in performance depending on the illuminated light beam size relative to the overlap area of the crossbar-type electrodes due to excess photo-current generated from the cell region outside the overlapped electrode area, where PEDOT:PSS plays as anode. We systematically investigated the relationship between the conductivity of the PEDOT:PSS, the illumination area and the amount of excess photo-current generated.
Appl. Phys. Lett.
2008
92
13
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