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High performance organic photovoltaic devices typically rely on type‐II P/N junctions for assisting exciton dissociation. Heremans and co‐workers recently reported a high efficiency device with a third organic layer which is spatially separated from the active P/N junction; but still contributes to the carrier generation by passing its energy to the P/N junction via a long‐range exciton energy transfer...
In article number 1606909, Ming‐Fai Lo, Chun‐Sing Lee, and co‐workers report unusual free‐carrier generation in some bipolar organic materials (SubNc and SubPc) upon photoexcitation. Single‐layer devices with SubNc or SubPc sandwiched between two electrodes can give power conversion efficiencies 30 times higher than previously reported single‐layer devices. Interestingly, these photoactive layers...
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