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Carrier Dynamics of Films of Zinc Phthalocyanine and C60 Measured By Terahertz Time Domain Spectroscopy

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Abstract

We studied photocarrier dynamics in organic photovoltaics by terahertz time domain spectroscopy. Transient THz absorption decays in C60 and zinc phthalocyanine span a wide range of timescales and reveal how to optimize photocarrier yields. We find evidence for direct excitation of a charge transfer state of C60 and morphology dependent excitation of free carriers.

© 2010 Optical Society of America

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