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Ballistic Charge Separation and Long-range Energy Transfer

Energy and charge transfer lies at the heart of many optoelectronic devices such as PVs and LEDs. We are exploring the limits of energy and charge transfer in molecular and nanoscale systems and examining questions such as, can excitons be transferred efficiently over µm length scales? How does coherent wave-like separation of electrons and holes occur in organic systems.

 

Coherent Electron-Hole Separation in Organic Photovoltaics

Charge Separation

We have developed a unique method to measure the strength of electric fields at interfaces with mv accuracy and on fs timescales. Using this method we have shown that efficient charge separation in organic PVs occurs via coherent ballistic motion of electrons through delocalised states. This allows charges to escape the Coulomb interaction in 200-300fs

Gélinas et al, Science (2014), Read More 

 

We have recently shown for the first time, that it is possible to efficiently transfer spin-triplet excitons from Organic to Inorganic Semiconductors. This opens up new possibilities for long-range energy transfer due to the long diffusion length of triplet excitons and provides new device architectures to build singlet fission enhanced solar cells.

Tabachnyk et al. Nature Materials (2014), Read More

 

 

 

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Paper published in Nature Reviews

Oct 05, 2017

Our review of Singlet Fission is published in Nature Reviews Materials

ERC Starter Grant

Sep 18, 2017

Our project SOLARX is funded by the ERC.

Paper published in Nature Chemistry

Sep 11, 2017

Hannah and Alex's paper on ultrafast 'endothermic' singlet fission is published in Nature Chemistry.

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