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Dan Credgington, Rick Hamilton, Pedro Atienzar, Jenny Nelson and James R. Durrant Non-Geminate Recombination as the Primary Determinant of Open-Circuit Voltage in Polythiophene:Fullerene Blend Solar Cells: an Analysis of the Influence of Device Processing Conditions Advanced Functional Materials 21

Version of Record online: 1 JUN 2011 | DOI: 10.1002/adfm.201100225

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The role of non-geminate recombination in determining the open-circuit voltage of P3HT/PCBM solar cells fabricated using different fabrication procedures is analyzed. Variations in open-circuit voltage between 0.4 and 0.65 V are shown to arise from variations in the rate coefficient for non-geminate recombination, as well as variations in charge carrier density in the photoactive layer of the devices. Quantification of these variations enables us to calculate the open-circuit voltage of each device to within ±5 mV.

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