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- W1996305046 abstract "The key process in organic photovoltaic cells is the charge separation at organic donor-acceptor interfaces. However, exactly how the charges separate into free charge carriers still remains a puzzle. We present here simulations of the electron dynamics of this process using a nonadiabatic Ehrenfest method. From these simulations, we give a direct illustration of the charge separation process. The results show that the delocalization of the electronic states involved plays a critical role in order to overcome the Coulomb attraction of the charge transfer (CT) exciton. Charge separation only occurs for sufficiently strong intermolecular interactions. Alternatively, the CT exciton relaxes into a bound polaron pair. The results also show that the ``excess energy'' of the hot CT exciton facilitates the charge separation process to a certain degree." @default.
- W1996305046 created "2016-06-24" @default.
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- W1996305046 date "2014-09-15" @default.
- W1996305046 modified "2023-09-25" @default.
- W1996305046 title "Dynamics of charge separation at an organic donor-acceptor interface" @default.
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- W1996305046 doi "https://doi.org/10.1103/physrevb.90.115420" @default.
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