Pankaj Kumar, Abhishek Sharma and Dwijendra Pratap Singh Effect of voltage sweep direction on the performance evaluation of P3HT : PCBM solar cells Progress in Photovoltaics: Research and Applications 21
Degradation studies are presented on P3HT : PCBM solar cells with forward (+ve to −ve) and reverse (−ve to +ve) sweep of applied voltages. The direction of voltage sweep during performance evaluation is found to have crucial effect on the photovoltaic parameters. This effect is observed because of polarization of active layer due to degradation and depends on the applied voltage. The effect becomes more prominent with time. For seriously degraded cell, both the dark and illuminated density–voltage characteristics passed through the second quadrant for forward sweep and at the same time through fourth quadrant for reverse sweep.
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