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Photophysics of molecular materials for photovoltaics

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If you have a question about this talk, please contact Jan Anton Koster.

In organic photovoltaics, usually combination of two molecular materials is used as active layer. After excitation one of these materials acts as electron donor and the other as electron acceptor. Photons that are aborbed by these layers can be converted very efficiently into charge carriers collected at the electrode at zero bias voltage(efficiency >50 %)Molecular materials generally have a low dielectric constant (relative dielectric constant 3-4) and it is not obvious how the photogenerated electron is separated from the hole against the Coulombic attraction. In this seminar I will discuss spectroscopic studies aimed at clearifying the origin of the high short circuit photocurrent in organic photovolatics.

This talk is part of the Optoelectronics Group series.

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