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Organic semiconductors

A little energy goes a long way

Excitons in a highly ordered organic semiconductor are found to diffuse over distances of a few micrometres. This may pave the way towards designing efficient excitonic solar cells.

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Figure 1: Molecular structure of rubrene (a) and schematic of the crystal structure (b) along the (a,b) crystallographic plane.
Figure 2: Illumination of a single rubrene crystal produces current at the surface of the crystal if the surface is functionalized with a layer that splits excitons.


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Silva, C. A little energy goes a long way. Nature Mater 9, 884–885 (2010).

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