Publication Details

Mozer, A. J., Sariciftci, N. S., Lutsen, L., Vanderzande, D., Osterbacka, R., Westerling, M. & Juska, G. (2005). Charge transport and recombination in bulk heterojunction solar cells studied by the photoinducted charge extraction by linearly increasing voltage technique. Applied Physics Letters, 86 (11), 1-3.


Charge carriermobility and recombination in a bulk heterojunctionsolar cell based on the mixture of poly[2-methoxy-5-(3,7-dimethyloctyloxy)-phenylene vinylene] (MDMO-PPV) and 1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)-C61 (PCBM) has been studied using the novel technique of photoinduced charge carrier extraction in a linearly increasing voltage (Photo-CELIV). In this technique, charge carriers are photogenerated by a short laser flash, and extracted under a reverse bias voltage ramp after an adjustable delay time (tdel). The Photo-CELIV mobility at room temperature is found to be μ = 2 × 10−4 cm2 V−1 s−1, which is almost independent on charge carrier density, but slightly dependent on tdel. Furthermore, determination of charge carrier lifetime and demonstration of an electric field dependent mobility is presented.



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