Journal of Applied Physics · 2011 · 27 citations · 18 references
EngineeringOrganic ElectronicsOrganic Solar CellPhotovoltaic EffectInduced ChargePhotovoltaic DevicesOptoelectronic DevicesChemistryPhotovoltaicsElectronic DevicesPhotodetectorsOptical PropertiesSolar Cell StructuresMaxwell-wagner Effect SystemCharge SeparationCharge ExtractionMw EffectElectrical EngineeringPhotochemistrySolar PowerNon-linear OpticPentacene/c60 InterfaceOrganic SemiconductorOrganic Charge-transfer CompoundElectronic MaterialsApplied PhysicsSolar CellsOptoelectronicsSolar Cell Materials
By using time-resolved optical electric-field-induced second-harmonic generation measurement, we directly probed photo-voltage generation process in organic double-layer (pentacene/C60) solar cells. Results showed that photoillumination induced negative excess charge Qs = −3.6 × 10−9 C/cm2 at the pentacene/C60 interface, and the induced charge caused generation of the open-circuit voltage 0.26 V. Using an equivalent circuit based on a Maxwell-Wagner (MW) effect model well accounted for the excess charge accumulation process. The MW model analysis also well accounted for the open-circuit voltage, the short-circuit current, and the fill-factor of organic solar cells (OSCs). We concluded that the excess charges due to the MW effect give a significant effect on the photovoltaic effect of OSCs.
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Solar cell efficiency tables (version 37)
Martin A. Green, Keith Emery, Yoshihiro Hishikawa et al. · Progress in Photovoltaics Research and Applications · 2010 · 759 citations · Full text