Origin of the efficient polaron-pair dissociation in polymer-Fullerene blends.
作者： Carsten Deibel , Thomas Strobel , Vladimir Dyakonov
DOI: 10.1103/PHYSREVLETT.103.036402
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摘要: The separation of photogenerated polaron pairs in organic bulk heterojunction solar cells is the intermediate but crucial step between exciton dissociation and charge transport to the electrodes. In state-of-the-art devices, above 80% of all polaron pairs are separated at fields of below 10 7 V/m. In contrast, considering just the Coulomb binding of the polaron pair, electric fields above 10 8 V/m would be needed to reach similar yields. In order to resolve this discrepancy, we performed kinetic Monte Carlo simulations of polaron-pair dissociation …
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