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- W2076015275 abstract "Transport of nanoscale energy in the form of excitons is at the core of photosynthesis and the operation of a wide range of nanostructured optoelectronic devices such as solar cells, light-emitting diodes and excitonic transistors. Of particular importance is the relationship between exciton transport and nanoscale disorder, the defining characteristic of molecular and nanostructured materials. Here we report a spatial, temporal and spectral visualization of exciton transport in molecular crystals and disordered thin films. Using tetracene as an archetype molecular crystal, the imaging reveals that exciton transport occurs by random walk diffusion, with a transition to subdiffusion as excitons become trapped. By controlling the morphology of the thin film, we show that this transition to subdiffusive transport occurs at earlier times as disorder is increased. Our findings demonstrate that the mechanism of exciton transport depends strongly on the nanoscale morphology, which has wide implications for the design of excitonic materials and devices. Excitons are bound electron-hole pairs that mediate light absorption and emission in organic devices. Here, the authors use spatial, spectral and time-resolved imaging to visualize exciton transport in tetracene crystals and thin films, showing the role of disorder on the diffusion of excitons." @default.
- W2076015275 created "2016-06-24" @default.
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- W2076015275 date "2014-04-16" @default.
- W2076015275 modified "2023-10-18" @default.
- W2076015275 title "Visualization of exciton transport in ordered and disordered molecular solids" @default.
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- W2076015275 doi "https://doi.org/10.1038/ncomms4646" @default.
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