Organic heterojunctions with dissimilar semiconducting properties are expected to provide a reliable platform in understanding the behaviors of photocarriers, important for the development of efficient photon-to-electrical energy conversion systems.  Although bottom-up supramolecular approaches are considered promising for the realization of such nanoscale heterojunctions, the dynamic nature of molecular assembly is problematic.  Here we report semiconducting nanoscale organic heterojunctions, demonstrated by nanotubular assembly of strategically designed molecular graphenes (Science 2006, PNAS 2009, Science 2011).  The dissimilar semiconducting segments thus connected are electronically communicable with one another over the heterojunction interface, and display characteristic excitation energy transfer and charge transport properties.

Tailoring nanoscale coaxial/linear semiconducting heterojunctions by controlled assembly of molecular graphenes

243rd National Meeting (2012)

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