Università Cattolica del Sacro Cuore Università Cattolica del Sacro Cuore

Campus di Brescia

Ultrafast electronic and nuclear dynamics in photovoltaic materials


Ore: 11.00

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Introduce: Stefania PAGLIARA, Università Cattolica del Sacro Cuore

Interviene: Dr. Carlo Andrea ROZZI, CNR - Istituto Nanoscienze, Modena, Italia

I will report on recent studies of sub-ps dynamics of photoinduced charge separation in several prototypical photovoltaic materials. The simulations, performed by combining Time-dependent Density-Functional Theory and Ehrenfest molecular dynamics were validated against high time resolution pump-probe spectroscopy and ultrafast electron diffraction. I will discuss the role of the coherent coupling between electronic and nuclear degrees of freedom in triggering charge delocalization and charge transfer both for covalently bonded molecules, non-bonded bulk heterojunctions, polymer-copolymer aggregates and Methylammonium Lead Iodide perovskites. I will further discuss the possible exploitation of our findings in order to design and synthesize novel molecular scaffolds for photovoltaic applications.

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