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Ultrafast Charge Separation in Low Band-Gap Polymer Blend for Photovoltaics

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Abstract

We observe ultrafast charge dissociation in a promising low-band-gap-polymer:fullerene blend for organic photovoltaics. An hot charge transfer state, precursor of free carriers, is formed in ~30 fs upon impulsive photoexcitation with excess energy.

© 2012 Optical Society of America

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