Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 19, Issue 29, Pages 18813-18830Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp03007j
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Funding
- Deutsche Forschungsgemeinschaft [SPP1839, SPP1840]
- Korea Foundation for International Cooperation of Science and Technology (Global Research Laboratory project) [K20815000003]
- German-Israeli Foundation [1256]
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Light-induced charge transfer from the photoexcited donor to the acceptor is the fundamental step towards current generation in organic solar cells. Experimental evidence for efficient charge separation on ultrafast time scales has been available for quite some time. Yet even today, the elementary mechanisms underlying this process in organic semiconductors and in particular the role of the coherent wave-like motion of electrons and nuclei for the charge separation are still a matter of considerable debate. In this perspective, we present a survey of the current understanding on the role of quantum coherences in organic semiconductors. Specifically, we discuss the role of vibronic couplings for ultrafast charge separation dynamics with particular attention on the potential implications for the light-to-current conversion process in photovoltaic devices.
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