We use neutron reflectivity and scattering to structurally characterize polymer-based solar cells having a fullerene derivative as the electron acceptor. From these data we find the structure coarsens upon annealing which results in a more efficient device although the photoluminescence also increases. This detrimental effect is counteracted by an improved co-continuous network of the two components which we demonstrate using sophisticated modeling.

Morphological effects on polymer-based solar cell performance

240th National Meeting (2010)

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