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arXiv · 1407.5596

Impact of quantized vibrations on the efficiency of interfacial charge separation in photovoltaic devices

Soumya Bera·Nicolas Gheeraert·Simone Fratini·Sergio Ciuchi·Serge Florens
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Abstract

We demonstrate that charge separation at donor-acceptor interfaces is a complex process that is controlled by the combined action of Coulomb binding for electron-hole pairs and partial relaxation due to quantized phonons. A joint electron-vibration quantum dynamical study reveals that high energy vibrations sensitively tune the charge transfer probability as a function of time and injection energy, due to polaron formation. These results have bearings for the optimization of energy transfer both in organic and quantum dot photovoltaics, as well as in biological light harvesting complexes.

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Soumya Bera, Nicolas Gheeraert, Simone Fratini, Sergio Ciuchi, Serge Florens. 2014-07-21. Impact of quantized vibrations on the efficiency of interfacial charge separation in photovoltaic devices. https://doi.org/10.1103/physrevb.91.041107

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